Top Software Testing Companies in Sofia

Ratings Updated: December 31, 2025

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Featured

What are Featured Providers?
QA Wolf

4.9 56 reviews
Premier Verified

$5,000+

Undisclosed

50 - 249

Serves Sofia, Bulgaria

Services provided

100% Application Testing

QA Wolf is a specialized company offering comprehensive Application Testing services, including automated QA testing and software quality assurance. Across their reviews, clients praise QA Wolf for their efficiency, responsiveness, and ability to integrate seamlessly into development processes. With consistently positive feedback, QA Wolf has been lauded for improving test coverage and reducing production bugs, with over 80% of reviews highlighting their impactful testing services and project management.

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Reviews mention Knowledgeable
The feedback from clients highlights QA Wolf's extensive knowledge and expertise in QA automation. One client noted that collaborating with QA Wolf felt like integrating a team of experienced QA engineers into their own staff, emphasizing their responsiveness and ability to deliver high-quality results. Achieving 99% test coverage in a short period and maintaining proactive communication further underscores their knowledgeable approach, with clients expressing overall satisfaction with their professionalism and commitment to continuous improvement.

QA Test Suite Dev & Maintainance for Security Platform

5.0 Jan 22, 2024

Using QA Wolf is like having a team of experienced QA automation engineers on my own engineering staff, but at a fraction of the cost, and without any hiring or training overhead. They took us from 0% to 99% test coverage in a few months, and they handle all ongoing test maintenance and development with very little time investment from us. Finally, the team at QA Wolf are great people - knowledgeable, friendly, responsive, and fun to work with.
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8 of 8 reviews are 5 stars

8 new reviews for Application Testing services

$50,000 – $199,999 avg. project cost

Reviewed 8 times in the past 6 months
In the last six months, QA Wolf has received consistently positive feedback from clients, highlighting their responsiveness, effective communication, and high-quality deliverables. Clients noted successful outcomes such as increased automated test coverage, reduced production bugs, and improved project management. One client emphasized the company's unique ability to maintain tests, while another praised their adaptability to shifting priorities. Overall, sentiment is highly favorable, with no significant areas for improvement identified.
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Average Project Cost Breakdown

$50,000 to $199,999 (10) $10,000 to $49,000 (2) Less than $10,000 (1) $200,000 to $999,999 (1)

What Clients Have Said
Clients consistently highlight QA Wolf's competitive pricing and exceptional value for money, noting that their services fit within budget constraints while delivering high-quality automated testing solutions. Feedback indicates that QA Wolf enables companies to reduce manual testing efforts significantly, with one client reporting a 50% decrease in QA costs. Overall, clients express satisfaction with the cost-effectiveness of QA Wolf's offerings, describing them as a reliable partner that enhances productivity and efficiency without compromising quality.
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United States (49) Canada (2) Australia (1) Colombia (1)

This provider is fluent in 1 language:

English
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Simform

4.8 82 reviews
Premier Verified

$25,000+

$25 - $49 / hr

1,000 - 9,999

Serves Sofia, Bulgaria

Services provided

10% AI Development

10% CRM Consulting and SI

10% Cloud Consulting & SI +7 services

10% Custom Software Development

10% E-Commerce Development

10% ECM Consulting and SI

10% ERP Consulting and SI

10% Enterprise App Modernization

10% Mobile App Development

10% Unified Communications Consulting & SI

Simform is a versatile software development company specializing in application testing and quality assurance services. The company consistently receives positive feedback, with 90% of reviews highlighting timely delivery and effective communication. Clients commend Simform for its technical expertise, flexibility, and proactive approach, making it a reliable partner for software quality assurance and development testing projects.

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Reviews mention Flexible
Client feedback consistently highlights Simform's flexibility as a key strength. For instance, one client noted their ability to adapt to changing project requirements and accommodate additional features without hesitation. Another client appreciated the team's responsiveness and willingness to work closely to prioritize adjustments. Overall, the sentiment surrounding flexibility is overwhelmingly positive, with clients emphasizing how this adaptability has fostered effective collaboration and successful project outcomes.

Mobile App Development for Digital Transformation Agency

4.5 Aug 24, 2023

The ability to accommodate and be flexible to our needs is impressive. This demonstrates their willingness to adapt and tailor their approach to meet our specific requirements.
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Custom Software Dev for an IT Consulting Company

5.0 Jun 23, 2023

We’re impressed by Simform’s flexibility and the knowledgeable ideas that they propose. This adaptability ensures that they can adjust to the evolving needs of our project.
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UI/UX Design & Custom Software Development for HR Firm

5.0 May 10, 2022

I’m impressed with Simform’s flexibility. This is new for us, and we haven’t been shy about continuing to develop our software after we’ve already given them specs. Simform happily and graciously accepts the challenges of us growing our software while they’re recoding.
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Custom Software Dev for Software & AI Design Company

4.5 May 9, 2022

Their lead time, flexibility, and personal touch are impressive. This enables them to respond swiftly and effectively to our changing demands.
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Product Development for Engagement SaaS Provider

5.0 Sep 17, 2021

They were very flexible when our team had a personal emergency interfere with the project. This is the reason I will certainly come back to Simform for more.
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12 of 13 Application Testing reviews are 5 stars

1 new review for Application Testing in past 6 months

$50,000 – $199,999 avg. project cost

Application Testing PROJECT HIGHLIGHT

App Development Services for Medical Cannabis Co
5.0 — Simform provided app development services for a medical cannabis company. The team updated the functionality of the client's main app product over a period of two years. Read more
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Industry Experience

Simform has received positive feedback across various industries, showcasing their expertise in business services, healthcare, fitness, and real estate, among others. Clients commend their responsiveness, project management, and technical knowledge, with many noting successful outcomes such as improved applications and streamlined processes. The overall sentiment indicates strong satisfaction with their services in these sectors, highlighting Simform's ability to adapt to diverse project requirements and deliver high-quality solutions.
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Utilities Financial services eCommerce Real estate Healthcare Logistics & Supply Chain Wellness & Fitness Agriculture Information technology Human Resources Media Other industries Consulting Advertising & marketing IT Services Nonprofit Construction Legal Arts, entertainment & music Gaming Food & Beverages Other Industry Hospitality & leisure Education Consumer Products Fitness Software Business services

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United States (48) Canada (6) England (4) Germany (4) United Arab Emirates (2) Switzerland (2) Netherlands (1) Norway (1) Singapore (1) Sweden (1) Israel (1) Ireland (1) Hungary (1) Finland (1)

This provider is fluent in 1 language:

English

This provider is available in 4 time zones:

Central Standard Time (CST)

Eastern Standard Time (EST)

Pacific Standard Time (PST)

Mountain Standard Time (MST)
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QualityLogic

4.9 30 reviews
Premier Verified

$5,000+

$25 - $49 / hr

50 - 249

Serves Sofia, Bulgaria

Services provided

100% Application Testing

QualityLogic is a distinguished provider of Application Testing and Software Quality Assurance services, offering comprehensive testing solutions such as QA Testing and Software Validation. Across numerous reviews, QualityLogic is praised for its professional communication, timely project delivery, and exceptional value for cost. Notably, 100% of reviewers commend their team’s expertise, communication, and commitment to quality, with no significant areas for improvement reported.

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20 of 22 Application Testing reviews are 5 stars

1 new review for Application Testing in past 6 months

$50,000 – $199,999 avg. project cost

Application Testing PROJECT HIGHLIGHT

Application Testing & QA for Cybersecurity Company
5.0 — QualityLogic provided QA services for a cybersecurity company. Their work included creating automation tests, test cases, and test plans, as well as executing those test cases and plans as manual QA Read more
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Industry Experience

QualityLogic has demonstrated its expertise across diverse industries including healthcare, advertising & marketing, information technology, and software development. Clients consistently commend their responsiveness, attention to detail, and professionalism. In healthcare, they excelled in enhancing product launches and user experiences. In the advertising sector, they ensured ADA compliance effectively. In IT and software industries, their testing capabilities, including regression and exploratory testing, significantly improved product quality. Overall, QualityLogic is well-suited for projects in healthcare, IT, advertising, and software development, showcasing strong customer satisfaction across all sectors.
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Healthcare Advertising & marketing Information technology Business services Legal Software Education Other Industry Arts, entertainment & music Consulting Transportation IT Services Financial services Media

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Average Project Cost Breakdown

$50,000 to $199,999 (7) $200,000 to $999,999 (7) $10,000 to $49,000 (6) Less than $10,000 (1) $1,000,000 to $9,999,999 (1)

What Clients Have Said
Clients consistently highlight QualityLogic's competitive pricing and exceptional value for money. One client noted that their 'cost to benefit ratio was a real win for our product launch,' while another mentioned that QualityLogic delivered 'strong project management' under budget. Overall, feedback indicates that clients feel they receive high-quality services that justify their investment, with many expressing satisfaction with the responsiveness and professionalism of the team.
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United States (25) Canada (1) Singapore (1) Spain (1)

This provider is fluent in 1 language:

English

This provider is available in 3 time zones:

Central Standard Time (CST)

Pacific Standard Time (PST)

Mountain Standard Time (MST)
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Cleverix - Software Engineering

5.0 7 reviews

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Premier Verified

$5,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

50% Application Testing

20% Mobile App Development

20% Web Development +1 service

10% UX/UI Design

Cleverix - Software Engineering is a specialized software testing company, offering comprehensive services like App Testing, QA Testing, and Software Quality Assurance. Across reviews, 100% of clients praised their technical expertise, responsiveness, and ability to integrate into teams seamlessly. Clients noted significant improvements in product quality, testing coverage, and release velocity, with no reported areas for improvement.

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3 of 3 reviews are 5 stars

3 new reviews for Application Testing services

$10,000 – $49,000 avg. project cost

Reviewed 3 times in the past 6 months
In the last six months, client feedback for Cleverix - Software Engineering has been overwhelmingly positive. Clients praised their strong technical expertise, efficient project management, and ability to deliver high-quality results on time. For instance, a CTO highlighted improvements in test coverage and defect detection, while a General Manager noted a 110% reduction in quote response times. Overall, Cleverix is recognized for its seamless integration into client teams and proactive communication, with no reported areas for improvement.
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Industry Experience

Cleverix has demonstrated expertise across Information Technology, Logistics & Supply Chain, and Consumer Products. In IT, they excel in QA processes, microservices, and cloud development, consistently delivering high-quality results and improved testing coverage. In Logistics, they effectively developed tailored CRM solutions, enhancing operational efficiency. Their work in Consumer Products focused on robust QA for a gifting platform, streamlining go-to-market strategies. Overall, clients praise their professionalism, responsiveness, and technical proficiency, making them a strong fit for projects in these industries.
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Logistics & Supply Chain Consumer Products Information technology

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Average Project Cost Breakdown

$50,000 to $199,999 (4) $10,000 to $49,000 (2)

What Clients Have Said
Clients consistently commend Cleverix for their competitive pricing and excellent value for money. One client noted that their pricing fit the budget while providing great cultural alignment and value for cost. Another highlighted their ability to deliver high-quality services on time, often exceeding expectations. Overall, sentiment is overwhelmingly positive, with clients expressing satisfaction with the cost-effectiveness of their engagements and the quality of deliverables received.
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United States (3) Bulgaria (2) England (1)

This provider is fluent in 4 languages:

Bulgarian

English

German

Russian

This provider is available in 3 time zones:

Greenwich Mean Time (GMT)

Eastern European Time (EET)

Eastern Standard Time (EST)
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Scalefocus

4.8 36 reviews
Premier Verified

$75,000+

$50 - $99 / hr

250 - 999

София, Bulgaria

Services provided

10% Application Testing

20% Mobile App Development

15% Custom Software Development +5 services

15% Web Development

10% AI Development

10% CRM Consulting and SI

10% Cloud Consulting & SI

10% IT Staff Augmentation

Scalefocus is a technology consulting and software development company providing tailored solutions across diverse industries, including energy, automotive, gaming, and telecommunications. With consistently positive feedback, 100% of reviews highlight their expertise, adaptability, and effective project management. Clients value their technical proficiency and customer-centric approach, which results in successful project outcomes and long-term partnerships.

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Industry Experience

Scalefocus has demonstrated notable expertise across various industries including Energy & Natural Resources, Automotive, Gaming, Gambling, and Healthcare. Clients praise their project management, technical proficiency, and ability to deliver tailored solutions. In the energy sector, they excel in data analytics and platform development, while in automotive and healthcare, they focus on digital transformation and user experience improvements. Overall, Scalefocus is perceived as a valuable partner, particularly for projects requiring a combination of technology insight and operational efficiency.
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Energy & natural resources Automotive Gaming Gambling Software Transportation Consulting IT Services Information technology Healthcare Hospitality & leisure Business services Advertising & marketing Manufacturing Government Telecommunications Media Other Industry Nonprofit

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Average Project Cost Breakdown

$50,000 to $199,999 (6) $200,000 to $999,999 (4) Less than $10,000 (2) $10,000 to $49,000 (2)

What Clients Have Said
Client feedback on Scalefocus indicates a strong overall sentiment regarding their cost and value for money. Many clients highlighted that Scalefocus provides 'good value for cost' and has a 'great culture fit.' One client noted that their pricing fit their budget while another emphasized a 'high price to quality ratio.' Overall, clients expressed satisfaction with the return on investment, citing timely delivery and high-quality results, reinforcing Scalefocus's reputation as a reliable partner.
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More responsive than most other service providers

Scalefocus is very responsive
They are a great candidate to start a conversation with. Send them a short message or project inquiry.
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Bulgaria (10) England (8) Germany (4) Switzerland (3) Belgium (2) Canada (1) France (1) Albania (1) Jordan (1) Netherlands (1) Sweden (1) United States (1) Austria (1)

This provider is fluent in 3 languages:

English

German

Turkish

This provider is available in 4 time zones:

Greenwich Mean Time (GMT)

Central European Time (CET)

Eastern European Time (EET)

Universal Coordinated Time (UTC)
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Featured

What are Featured Providers?
Savarian.tech

5.0 8 reviews
Verified

$1,000+

$25 - $49 / hr

10 - 49

Serves Sofia, Bulgaria

Services provided

100% Application Testing

Savarian.tech is an application testing company specializing in Software Quality Assurance and comprehensive Testing Services. They have consistently received positive feedback, with reviewers highlighting their expertise in App QA and their client-centric approach. Approximately 100% of reviewers praised their commitment to quality and project management skills, noting timely delivery and seamless communication. Their flexibility and attention to detail are frequently commended.

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Reviews mention Exceptional results
Savarian.tech has garnered exceptional feedback for delivering outstanding results in software testing and quality assurance. Clients praised their meticulous approach, with one CEO noting a significant decrease in critical bugs and improved system performance. Another client highlighted enhanced website functionality leading to doubled leads. Their commitment to quality, seamless communication, and adaptability to project needs were frequently mentioned, underscoring their capability to exceed expectations consistently.

App Testing Services for App Development Company

5.0 Sep 5, 2023

Savarian.tech's testing processes led to a substantial decrease in critical and high-severity bugs, ensuring a more stable and reliable software environment. Through load and performance testing, Savarian.tech improved system response times and scalability, resulting in enhanced user satisfaction and system efficiency. Security assessments by Savarian.tech identified vulnerabilities, reducing the risk of security incidents and boosting user trust.
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Multifaceted QA Services for Content Marketing Studio

5.0 Jan 19, 2023

The number of happy leads doubled since we improved functionality and user experience. Website performance has improved, and it works without a hitch. Savarian.tech is a dedicated and skilled team, a master of its business. They know how to bring the quality of your product to the next level.
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Industry Experience

Savarian.tech has demonstrated expertise across several industries, including Software, Design, Advertising & Marketing, and Other sectors. Clients have praised their commitment to quality, innovation, and effective communication. In the Software domain, they excel in performance optimization and scalability. In Design, they enhance user experience, while in Advertising & Marketing, they streamline testing workflows. Overall, feedback reflects strong satisfaction, indicating Savarian.tech is a solid choice for projects requiring thorough testing and quality assurance across these industries.
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Software Design Advertising & marketing Other Industry

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Poland (2) Ukraine (2) United States (1)

$499 1 Website (<10 pages max) 2 Browsers 1 Mobile $999 1 Website (<20 pages) 3 Browsers 2 Mobile $1,999 1 Website (>20 pages) 5 Browsers 5 Mobile

Website Testing Packages
With our Website Testing Packages, you can confidently launch your website, knowing it has been thoroughly tested and optimized by our experienced QA professionals. Stay ahead of the competition and provide your users with a flawless online journey. Choose the package that aligns with your goals and let us transform your website
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BetterQA

4.9 63 reviews
Premier Verified

$5,000+

Undisclosed

50 - 249

Serves Sofia, Bulgaria

Services provided

80% Application Testing

10% Application Management & Support

10% Other IT Consulting and SI

BetterQA is a specialized software testing company, focusing on QA Testing, Software Quality Assurance, and Development Testing across various industries. With 100% positive feedback, their expertise in App Testing, structured QA processes, and tailored solutions are consistently praised. 60% of reviewers highlight their exceptional communication and ability to integrate seamlessly into client workflows, ensuring effective and efficient project outcomes.

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Reviews mention Autonomous
The feedback regarding Better QA highlights their autonomy and effectiveness in project execution. Clients noted their testers took on additional responsibilities beyond initial expectations, managed their tasks well, and consistently delivered high-quality work without missing deadlines. One client emphasized their ability to work independently and contribute significantly to the overall testing efforts, showcasing a remarkable work ethic. Overall sentiment is highly positive, with clients expressing satisfaction and regret over budget constraints limiting continued collaboration.

Mobile App Testing for Children's Products Company

5.0 Jul 19, 2022

The team from Better QA were really really good testers, both of them took on way more responsibility than initially projected, and made major contributions to the overall test efforts supported by the NA team. They worked with relative autonomy, managed their efforts well, and reported excellent bugs to the software team.
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4 of 5 reviews are 5 stars

4 new reviews for Application Testing services

$50,000 – $199,999 avg. project cost

Reviewed 5 times in the past 6 months
In the past six months, clients have consistently praised BetterQA for their structured approach to quality assurance and their ability to deliver tailored solutions that align with business needs. Notably, one client reported a 60% reduction in recruitment process time, while another highlighted improved operational consistency and reduced rework. Overall, the sentiment is highly positive, with clients noting excellent communication, timely deliverables, and a strong understanding of their unique challenges, although some suggested minor improvements in detail absorption.
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Average Project Cost Breakdown

$10,000 to $49,000 (19) $50,000 to $199,999 (10) Less than $10,000 (5) $200,000 to $999,999 (2)

What Clients Have Said
Clients consistently highlight BetterQA's strong value for money, noting that their pricing fits within budget while delivering high-quality services. One client stated, 'Good value for cost,' and another emphasized, 'Pricing fit our budget.' Overall sentiment reflects satisfaction with the balance of cost and service quality, with multiple reviews indicating that BetterQA exceeded expectations without significant areas for improvement in pricing.
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$4,500 Startups, Small Teams $7,500 Growing Businesses $9,000 Enterprises, Complex

BetterQA Independent Testing Solutions
Independent testing that tells you what's actually broken, not what you want to hear. We bridge the gap between developers who build it and business teams who sell it. Bottom line: we make sure your releases work so you can sleep at night.
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QAlified

4.9 20 reviews
Premier Verified

Undisclosed

$25 - $49 / hr

10 - 49

Serves Sofia, Bulgaria

Services provided

100% Application Testing

QAlified is a distinguished company specializing in Application Testing and Software Quality Assurance. Their services encompass a wide range of testing, including functional, performance, security, and compatibility testing. With a 100% positive feedback rate, clients consistently praise their high-quality findings, timely delivery, and commitment to enhancing software reliability. Notably, 80% of reviews highlight their impressive flexibility and alignment with client needs.

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Reviews mention Detail-oriented
Clients have consistently praised QAlified for their detail-oriented approach, noting their 'meticulous bug-finding' and 'stringent testing procedures' which significantly enhance user experience. The CEO of Savage Global Marketing highlighted their 'sharp eye for finding and fixing software defects,' ensuring high-quality service delivery. Overall, the sentiment reflects strong satisfaction with QAlified's commitment to detail, contributing to improved platform performance and user satisfaction.

Application Testing for Advertising & Marketing Company

5.0 Jun 8, 2024

Since the beginning of our collaboration with QAlified, they have proven to have a sharp eye for finding and fixing a number of software defects, giving us priceless insight into the caliber of our platform. Their meticulous bug-finding and stringent testing procedures have allowed us to greatly improve the user experience on our platform. Their rigorous attention to detail and testing procedures guarantee that our customers receive high-quality service, which improves user experience and streamlines their platform interactions.
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Application Testing for Aviation Services Company

5.0 Aug 17, 2023

They demonstrated a deep understanding of our application's intricacies, which allowed them to identify even the most subtle issues that could impact user experience. This attention to detail ensured that potential problems were addressed before they could affect the end-user, thereby enhancing the application's performance and reliability.
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Industry Experience

QAlified has demonstrated strong expertise across various industries, including IT Services, Media, Software, Advertising & Marketing, Manufacturing, and Government. Clients have praised their meticulous QA processes, ability to enhance system reliability, and effective communication. The overall sentiment reflects satisfaction with their performance, timely delivery, and adaptability, making QAlified a compelling option for projects in healthcare, media, software development, and government sectors.
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IT Services Media Software Advertising & marketing Manufacturing Education Government Retail Information technology

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Average Project Cost Breakdown

Less than $10,000 (3) $10,000 to $49,000 (3) $50,000 to $199,999 (3) $200,000 to $999,999 (2) $1,000,000 to $9,999,999 (1)

What Clients Have Said
Clients consistently highlight QAlified's competitive pricing and excellent value for money. One client noted that their pricing 'fit our budget' and provided 'good value for cost,' while another appreciated their 'flexibility and turnaround time.' Overall, the sentiment is positive, with multiple reviews emphasizing the company's ability to deliver high-quality services at reasonable rates, making them a preferred choice for various projects.
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United States (9) Uruguay (7) Germany (1)
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Reactive Hive Ltd

5.0 7 reviews

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

100% Application Testing

Reactive Hive – QA service agency specializes in Application and Software Quality Assurance, providing comprehensive testing services such as functional, regression, and automated testing. Across their reviews, 100% of clients commend their attention to detail and ability to integrate seamlessly into existing workflows. They are praised for delivering high-quality testing services at reasonable prices, contributing significantly to project success.

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Reviews mention Communicative
Clients have consistently praised Reactive Hive for their exceptional communication skills, noting their thorough organization at all levels. One client highlighted that effective communication was a key deciding factor in choosing Reactive Hive, stating they 'won hands down' in both experience and communication. Additionally, the fluid workflow facilitated by tools like ClickUp and Slack further underscores their communicative approach, enhancing collaboration and project management.

App Testing for E-Commerce Services Providing Company

5.0 Apr 21, 2022

We have a very fluid workflow, the process of using ClickUp and Slack has worked well in managing the workload. Their expertise in properly testing all aspects of e-commerce platforms and communication skills is impressive. They are thoroughly organized at all levels.
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6 of 6 Application Testing reviews are 5 stars

$10,000 – $49,000 avg. project cost

Application Testing PROJECT HIGHLIGHT

E-Commerce Software Testing for Furtniture Marketplace
5.0 — Reactive Hive was hired by a furniture marketplace to support their manual testing efforts. They're tasked with documenting new features, doing automated tests, and assisting in field tech issue Read more
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Industry Experience

Reactive Hive has demonstrated significant expertise in the IT Services, Retail, and Software industries, particularly excelling in QA for e-commerce and mobile applications. Clients noted their profound attention to detail, effective communication, and ability to uncover critical bugs, enhancing project quality and delivery timelines. Overall sentiment across industries is highly positive, highlighting their capability to integrate seamlessly into existing workflows and their commitment to providing valuable testing solutions tailored to client needs.
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IT Services Retail Software

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Average Project Cost Breakdown

$10,000 to $49,000 (2)

What Clients Have Said
The reviews for Reactive Hive reflect a generally positive sentiment regarding the company's cost-effectiveness and value for money. Clients frequently noted that Reactive Hive delivers exceptional quality at reasonable prices, making their services accessible even to small startups on limited budgets. For instance, one client highlighted their 'great job for a reasonable price,' while another emphasized that the pricing fit their budget and provided 'good value for cost.' Overall, clients expressed satisfaction with the return on investment from Reactive Hive's services.
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App Streams Ltd

5.0 7 reviews

$25,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

15% Application Testing

30% Web Development

25% Mobile App Development +3 services

10% AI Development

10% IoT Development

10% UX/UI Design

App Streams Ltd is a dynamic software development company specializing in Application Testing and QA Testing. The company is praised for its work ethic, efficient project management, and ability to deliver high-quality, reliable software solutions. Positive feedback is evident in 100% of reviews, highlighting their cultural fit and innovative approaches, with 66% mentioning their impressive team culture and alignment with client values.

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2 of 2 reviews are 5 stars

$10,000 – $49,000 avg. project cost

Reviewed 2 times in the past 6 months
In the last six months, clients have praised App Streams Ltd for their professionalism, timely delivery, and strong alignment of values. One client noted the impressive quality of code and effective communication, stating, "Everything was perfectly estimated and all features were delivered on time." Another client highlighted their expertise, mentioning that the app launched successfully with 50,000 downloads. Overall, sentiment is highly positive, with no significant areas for improvement identified.
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3 of 3 Application Testing reviews are 5 stars

$200,000 – $999,999 avg. project cost

Application Testing PROJECT HIGHLIGHT

Mobile App Development for Healthcare Company
5.0 — A healthcare company has hired App Streams Ltd for mobile app development. The team's work includes React, Nojde.js, and Python development from scratch. Read more
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Average Project Cost Breakdown

$10,000 to $49,000 (1) $200,000 to $999,999 (1)

What Clients Have Said
Clients consistently regard App Streams Ltd as offering strong value for money, noting their impressive project management and delivery. For instance, a CEO mentioned a $140,000 investment resulting in an app with 50,000 downloads, affirming the return on investment. Another client highlighted 'good value for cost' and 'great culture fit,' reinforcing the sentiment that their pricing aligns well with the quality of service provided. Overall, the feedback reflects a positive perception of cost-effectiveness and project outcomes.
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More responsive than most other service providers

App Streams Ltd is very responsive
They are a great candidate to start a conversation with. Send them a short message or project inquiry.
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Wiser Technology

4.9 42 reviews

$25,000+

$25 - $49 / hr

250 - 999

Sofia, Bulgaria

Services provided

10% Application Testing

70% Custom Software Development

20% IT Managed Services

Wiser Technology is a company specializing in Application Testing and Software Quality Assurance. Feedback highlights their efficient onboarding process and the exceptional skills of their QA testers, making them feel integral to their clients' teams. With 100% positive reviews, clients commend Wiser Technology for their dedication and effective remote collaboration.

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Reviews mention Innovative
Client feedback highlights Wiser Technology's innovative approach, particularly in tackling complex technical challenges with creative solutions. One client noted their ability to deliver unique solutions tailored to specific needs, showcasing a blend of creativity and technical expertise. The commitment to excellence and proactive communication further reinforces the positive sentiment regarding their innovative capabilities, making them stand out in the industry.

Development Staff Augmentation for IT Services Company

5.0 Feb 9, 2024

What truly stood out to us about ITIDO was their innovative approach to solving problems and their unwavering commitment to excellence. They consistently went above and beyond to deliver unique solutions that perfectly met our needs, setting them apart from others in the industry. Their team exhibited a rare blend of creativity, technical expertise, and customer-focused service, making our experience with them not just satisfactory but genuinely impressive.
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Industry Experience

Wiser Technology has garnered positive feedback across various industries, showcasing expertise primarily in IT Services, Telecommunications, Healthcare, and Media. In IT Services, clients praised their innovative solutions and project management. In Telecommunications, they received accolades for responsiveness and integration capabilities. Their work in Healthcare demonstrated adaptability and technical proficiency, while feedback from Media highlighted effective collaboration and user-focused design. Overall, their strengths lie in software development, cloud solutions, and agile project management, making them a suitable partner for clients in these sectors.
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IT Services Research Telecommunications Information technology Sports Real estate Media Healthcare Financial services Software Food & Beverages Nonprofit Business services Education Other Industry Advertising & marketing Agriculture Energy & natural resources

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Average Project Cost Breakdown

$10,000 to $49,000 (10) $50,000 to $199,999 (7) Less than $10,000 (6) $200,000 to $999,999 (4) $1,000,000 to $9,999,999 (2)

What Clients Have Said
Clients consistently highlight Wiser Technology's competitive pricing and excellent value for money. For instance, one client noted that their pricing fit their budget while still delivering high-quality work, emphasizing a great culture and alignment in values. Another client commended them for providing good value for the cost, leading to satisfaction with the project's outcomes. Overall, the sentiment reflects a strong appreciation for the cost-effectiveness of Wiser Technology's services.
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Bulgaria (20) Germany (5) United States (4) Finland (3) Canada (2) Switzerland (2) England (2) Ireland (1) Norway (1) Singapore (1) United Arab Emirates (1)
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Stanga1

4.8 8 reviews

$5,000+

$50 - $99 / hr

250 - 999

Sofia, Bulgaria

Services provided

10% Application Testing

20% Custom Software Development

15% IT Staff Augmentation +5 services

15% Web Development

10% CRM Consulting and SI

10% Cloud Consulting & SI

10% Cybersecurity

10% Mobile App Development

Stanga1 is a leading company specializing in Software Quality Assurance and Development Testing services. Their client reviews highlight a strong commitment to quality, teamwork, and timely delivery, with 100% positive feedback on their communication and problem-solving skills. Notably, 90% of reviewers commend their adaptability and technical expertise in full-stack development and cloud infrastructure.

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Reviews mention Trustworthy
The overall sentiment regarding Stanga1's trustworthiness is highly positive, as evidenced by client feedback highlighting their reactivity, accuracy, and reliability in technical execution. One client noted that Stanga1 delivered on time and provided good value for cost, reinforcing their reputation as a dependable partner. The referral-based selection also suggests a strong level of trust from previous clients, further affirming Stanga1's credibility in the market.

Interactive Video for Online Medical Training Company

5.0 May 15, 2023

They were reactive, accurate, and trustworthy.
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Average Project Cost Breakdown

What Clients Have Said
Stanga1 has received consistent feedback highlighting their strong value for cost. Clients have noted their 'good value for cost' in multiple reviews, emphasizing that their services provide tangible benefits, including increased efficiency and reduced implementation costs. One client specifically mentioned substantial cost savings due to leveraging cloud technologies. Overall sentiment reflects satisfaction with the financial investment, indicating that clients perceive Stanga1 as a cost-effective partner in achieving their project goals.
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Belgium (1) Bulgaria (1) France (1) Germany (1)

1 of 1 Sofia-based review is 5 stars

Unknown avg. project cost for Application Testing services in Sofia

Sofia-based Application Testing project highlight

Web & Mobile App Dev for Software Development Company
5.0 — Stanga1 has developed a software development firm's web and mobile apps. They've managed the end-to-end development of the apps, processed and optimized large volumes of data, and built a cloud Read more
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SoCyber

5.0 13 reviews

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

10% Application Testing

10% Application Management & Support

10% BI & Big Data Consulting & SI +7 services

10% Blockchain

10% Corporate Training & Coaching

10% Cybersecurity

10% Graphic Design

10% Public Relations

10% Social Media Marketing

10% Web Development

SoCyber is a specialized company offering Application Testing and Software Quality Assurance services, particularly in web application and API penetration testing. The reviews are overwhelmingly positive, with 100% of clients highlighting the professionalism and efficiency of their technical team and streamlined communication. Clients commend their ability to deliver quality work on time and within budget, although a post-remediation verification phase could enhance their offerings.

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Reviews mention Knowledgeable
Clients consistently praise SoCyber for their extensive knowledge and expertise in cybersecurity. One reviewer highlighted their ability to provide clear insights into security vulnerabilities, emphasizing their proficiency in both technical and non-technical communication. Another client commended SoCyber for their thorough approach, which included sharing best practices and offering structured recommendations. Overall, the sentiment regarding their knowledge is overwhelmingly positive, with clients expressing satisfaction and confidence in their capabilities.

Network Segmentation for IT Consulting Firm

5.0 Jul 5, 2023

They are open and friendly, have a professional approach and are able to bring expertise and knowledge to the table.
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Cybersecurity for Financial Management Solutions Firm

5.0 Jul 5, 2023

SoCyber provided great insights into the security of our web application. They were knowledgeable in their field and are very happy to help us on any questions we had. The results were clear for both technical and non-technical people to read and their online portal, Kikimora, is easy to use.
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Penetration Testing for Cybersecurity Company

5.0 Nov 16, 2021

They identified vulnerabilities the client was not aware of. On top of that they shared know-how and advised on best practices to avoid these in the future.
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2 of 2 Application Testing reviews are 5 stars

1 new review for Application Testing in past 6 months

Less than $10,000 avg. project cost

Application Testing PROJECT HIGHLIGHT

Penetration Testing for Video Chat Services Company
5.0 — SoCyber conducted web app and API penetration testing for a video chat services company. They adhered to the OWASP Web Security Testing Guide and other custom frameworks for the tests. Read more
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Average Project Cost Breakdown

Less than $10,000 (11)

What Clients Have Said
Clients consistently highlight SoCyber's competitive pricing and strong value for money. For instance, a CTO noted that SoCyber's pricing fit their budget while ensuring a good value for the cost. Similarly, another client appreciated the range of service options from basic to complex, allowing for flexibility in expenditures. Overall, sentiment towards SoCyber's cost-effectiveness is positive, with many clients expressing satisfaction with the quality of services received relative to the investment made.
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Bulgaria (8) England (2) United States (1)
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DSS - Digital and Software Solutions

5.0 4 reviews

$10,000+

$25 - $49 / hr

50 - 249

Sofia, Bulgaria

Services provided

10% Application Testing

40% IT Staff Augmentation

20% Web Development +4 services

15% Custom Software Development

5% Application Management & Support

5% IT Managed Services

5% Other IT Consulting and SI

DSS - Digital and Software Solutions provides comprehensive services in software development, ServiceNow development, and consulting. The company has received positive feedback for their professional project management, effective automation of processes, and responsive team. Their expertise in App Testing and QA Testing has been highlighted, with clients appreciating the swift response to needs and high project success rates.

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Reviews mention Detail-oriented
Clients consistently praise DSS - Digital and Software Solutions for their detail-oriented approach. Feedback highlights their 'precision to detail' and ability to deliver solutions that align closely with client needs. One client noted their impressive flexibility and commitment to finding the best solutions, further reinforcing the positive sentiment surrounding their meticulous work. Overall, the sentiment is highly favorable, with no recommendations for improvement, indicating a strong alignment with client expectations.

UX/UI Design for Bank

5.0 Jun 25, 2025

The company is noted for their flexibility and precision to detail. They consistently strive to find the best solution for the client, ensuring that every aspect of the project is carefully considered and executed with meticulous attention.
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1 of 1 reviews is 5 stars

$200,000 – $999,999 avg. project cost

Reviewed 1 time in the past 6 months
Recent reviews for DSS - Digital and Software Solutions reflect a highly positive sentiment, with clients praising their responsiveness and attention to detail. A notable instance involved a project for United Bulgarian Bank, where DSS enhanced mobile banking functionalities and delivered on time. Clients highlighted the company's flexibility and value for cost, with no recommendations for improvement, indicating a strong fit for various projects.
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Industry Experience

DSS - Digital and Software Solutions has demonstrated expertise across several industries, including Banking, Research, and Information Technology. Feedback highlights their strengths in improving customer experiences in banking applications, delivering complex cybersecurity platforms for universities, and providing quality IT support solutions. Overall sentiment is highly positive, reflecting their reliability, flexibility, and strong project management capabilities, making them a suitable partner for clients in these sectors.
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Banks Research Information technology

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Average Project Cost Breakdown

$200,000 to $999,999 (1)

What Clients Have Said
Clients consistently highlight DSS - Digital and Software Solutions for their competitive pricing and strong value for money. One client noted, 'Pricing fits our budget' and 'Good value for cost,' while another echoed similar sentiments, emphasizing their 'great culture fit' and alignment of values. Overall, reviews reflect a positive sentiment regarding cost-effectiveness, with no significant complaints regarding pricing or value, indicating a reliable choice for project partners.
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MyApp.BG

5.0 1 review

$5,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Services provided

10% Application Testing

80% Mobile App Development

10% Application Management & Support

MyApp.BG is a development company that specializes in designing and creating applications from scratch. The overall feedback is highly positive, with 100% of the reviewers highlighting their responsiveness and client-focused approach. The company is praised for its good pricing and effective project management, though it could benefit from increased local advertising.

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Industry Experience

MyApp.BG has received positive feedback primarily from clients in the health and wellness sector, highlighted by successful project outcomes and effective collaboration. Clients appreciate their responsiveness and competitive pricing while noting their expertise in transforming ideas into functional applications. Overall sentiment indicates strong satisfaction with their development capabilities, making them a suitable partner for clients in health-related projects seeking reliable app development services.
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Other Industry

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Average Project Cost Breakdown

What Clients Have Said
Clients have expressed satisfaction with MyApp.BG's pricing, noting that they offer 'good prices' while delivering quality work. One client highlighted the successful sale of their app, attributing their achievement to the effective collaboration with MyApp.BG. Overall, the sentiment regarding cost and value for money is positive, with clients appreciating the balance between affordability and the quality of service received.
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Quality House

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

Sofia, Bulgaria

Services provided

80% Application Testing

20% IT Staff Augmentation

Application Testing company Quality House is in Sofia, Bulgaria and Bucharest, Romania. They provide Application Testing and IT staff augmentation.
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adesso Bulgaria

Not yet reviewed

$25,000+

$25 - $49 / hr

50 - 249

Sofia, Bulgaria

Services provided

20% Application Testing

30% Custom Software Development

20% Application Management & Support +2 services

20% IT Managed Services

10% Enterprise App Modernization

Adesso Bulgaria is a custom software development company established in 2018. Their services include Custom Software Development and IT managed services.
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DeepSource

Not yet reviewed

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

25% Application Testing

30% Mobile App Development

30% Web Development +1 service

15% Custom Software Development

DeepSource, a mobile app development company, is headquartered in Sofia, Bulgaria. The team specializes in Mobile App Development and Web Development.
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Atom Solutions Ltd.

Not yet reviewed

$5,000+

$25 - $49 / hr

50 - 249

Sofia, Bulgaria

Services provided

10% Application Testing

30% Web Development

20% Web Design +4 services

15% Mobile App Development

10% AR/VR Development

10% UX/UI Design

5% Graphic Design

Atom Solutions Ltd. Is a web development firm founded in 2008. Located in Sofia, Bulgaria and Silkeborg, Denmark, the team focuses on Web Development and Web Design.
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Energize Global Services

Not yet reviewed

$10,000+

$50 - $99 / hr

250 - 999

Sofia, Bulgaria

Services provided

10% Application Testing

30% IT Staff Augmentation

19% Custom Software Development +8 services

10% DevOps Managed Services

10% Microservices Architecture Services

10% Web Design

5% Cloud Consulting & SI

3% Staffing

1% AI Development

1% IT Strategy Consulting

1% Recruiting

Energize Global Services is a Yerevan, Armenia-based IT staff augmentation company. They focus on IT staff augmentation and Custom Software Development and were established in 2007.
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NATEK

Not yet reviewed

Undisclosed

Undisclosed

250 - 999

Sofia, Bulgaria

Services provided

10% Application Testing

10% Application Management & Support

10% Cloud Consulting & SI +10 services

10% Custom Software Development

10% IT Managed Services

10% Web Design

7% ERP Consulting and SI

7% Unified Communications Consulting & SI

6% CRM Consulting and SI

5% BI & Big Data Consulting & SI

5% Cybersecurity

5% IT Staff Augmentation

5% Mobile App Development

Launched in 2004, NATEK is a custom software development firm. Their services include Custom Software Development and cloud consulting & SI.
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Estafet

Not yet reviewed

$100,000+

$50 - $99 / hr

50 - 249

Sofia, Bulgaria

Services provided

20% Application Testing

20% AI Development

20% API Development +3 services

20% Microservices Architecture Services

10% Custom Software Development

10% Web Design

Estafet is a midsize custom software development firm. Launched in 2002, the team provides Custom Software Development and Artificial Intelligence.
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1Crew

Not yet reviewed

$5,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

30% Application Testing

30% Cloud Consulting & SI

15% IT Managed Services +2 services

15% IT Strategy Consulting

10% IT Staff Augmentation

1Crew is a cloud consulting & SI company launched in 2013. The team focuses on cloud consulting & SI and Application Testing.
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TINQIN

Not yet reviewed

$50,000+

$50 - $99 / hr

250 - 999

Sofia, Bulgaria

Services provided

10% Application Testing

40% Custom Software Development

15% Business Consulting +5 services

10% Application Management & Support

10% Web Development

5% IT Strategy Consulting

5% UX/UI Design

5% Web Design

In Sofia, Bulgaria, TINQIN is a midsize custom software development firm. Their services include Custom Software Development and Business Consulting.
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Soft2Run

Not yet reviewed

$10,000+

$25 - $49 / hr

10 - 49

Bałsza, Bulgaria

Services provided

15% Application Testing

30% Custom Software Development

20% AI Development +6 services

10% Application Management & Support

5% E-Commerce Development

5% Enterprise App Modernization

5% Mobile App Development

5% Other Application Development

5% Web Development

Soft2Run is a software development company. The team is headquartered in Bałsza, Bulgaria, and their services include Custom Software Development and Artificial Intelligence.
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NCB Ltd

Not yet reviewed

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

20% Application Testing

30% Custom Software Development

30% Web Development +2 services

10% Blockchain

10% IoT Development

Founded in 2013, NCB Ltd is a software development firm. Their team offers Custom Software Development and Web Development.
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Concord Europe

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

Sofia, Bulgaria

Services provided

15% Application Testing

30% Custom Software Development

30% IT Staff Augmentation +3 services

10% BI & Big Data Consulting & SI

10% Other IT Consulting and SI

5% IT Strategy Consulting

Concord Europe is an IT staff augmentation company launched in 2017. The team offers IT staff augmentation and Custom Software Development.
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ENDIGITAL

Not yet reviewed

$25,000+

$50 - $99 / hr

50 - 249

Sofia, Bulgaria

Services provided

15% Application Testing

15% Custom Software Development

15% E-Commerce Development +4 services

15% IT Staff Augmentation

15% Mobile App Development

15% Web Development

10% IT Managed Services

ENDIGITAL is a custom software development firm launched in 2012. The team offers Custom Software Development and E-Commerce Development and is located in Sofia, Bulgaria and LONDON, England.
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Wildorb Interactive Design Studio

Not yet reviewed

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

10% Application Testing

10% Branding

10% Custom Software Development +7 services

10% E-Commerce Development

10% Graphic Design

10% IoT Development

10% Mobile App Development

10% UX/UI Design

10% Web Design

10% Web Development

Wildorb Interactive Design Studio, a software development firm, is based in Sofia, Bulgaria. They provide Custom Software Development and UX/UI Design.
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Sourcelab

Not yet reviewed

$5,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

15% Application Testing

15% UX/UI Design

15% Web Development +6 services

10% Custom Software Development

10% E-Commerce Development

10% Low/No Code Development

10% Mobile App Development

10% Web Design

5% Application Management & Support

Sourcelab is an UX design agency. They offer UX/UI Design and Web Development and were established in 2019. The company is in Sofia, Bulgaria and Amsterdam, Netherlands.
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More responsive than most other service providers

Sourcelab is very responsive
They are a great candidate to start a conversation with. Send them a short message or project inquiry.
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Roller Gaming Ltd.

Not yet reviewed

$100,000+

$50 - $99 / hr

10 - 49

Sofia, Bulgaria

Services provided

15% Application Testing

45% Mobile App Development

20% Custom Software Development +1 service

20% Web Development

Roller Gaming Ltd. Is a mobile app development company established in 2021. The firm provides Mobile App Development and Custom Software Development, and is small.
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Devocean Services

5.0 2 reviews

$10,000+

$50 - $99 / hr

50 - 249

Sofia, Bulgaria

Services provided

10% Application Testing

25% Custom Software Development

25% Enterprise App Modernization +3 services

15% Mobile App Development

15% Web Development

10% Application Management & Support

Devocean Services provides comprehensive IT solutions, including application testing, software testing, and app QA, specializing in creating and overhauling platforms for consultancy and IT firms. Their reviews highlight a strong emphasis on professionalism, transparent communication, and timely delivery. Clients commend their entrepreneurial experience, superior project management, and ability to meet client needs efficiently, often exceeding expectations without compromise on budget or timeline.

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VA Software Solutions ltd

Not yet reviewed

$50,000+

$50 - $99 / hr

10 - 49

Sofia, Bulgaria

Services provided

10% Application Testing

20% Custom Software Development

20% Enterprise App Modernization +4 services

20% Web Development

10% Application Management & Support

10% BI & Big Data Consulting & SI

10% Robotics Process Automation

Launched in 2019, VA Software Solutions ltd is a custom software development company. Based in Earley, England and Sofia, Bulgaria, the team focuses on Custom Software Development and Web
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SavvyTribe

Not yet reviewed

$25,000+

$50 - $99 / hr

10 - 49

Sofia, Bulgaria

Services provided

10% Application Testing

25% Custom Software Development

25% IT Staff Augmentation +4 services

10% AI Development

10% BI & Big Data Consulting & SI

10% Cloud Consulting & SI

10% Enterprise App Modernization

SavvyTribe is an IT staff augmentation company. Launched in 2022, the agency is in Sofia, Bulgaria and Sofia, Bulgaria. Their services include IT staff augmentation and Custom Software Development.
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Emerging Markets Consulting

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Sofia, Bulgaria

Services provided

25% Application Testing

50% IT Strategy Consulting

25% Business Consulting

Emerging Markets Consulting is a small IT strategy consulting company located in Sofia, Bulgaria. The team provides IT strategy consulting and Application Testing.
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Populosoft

Not yet reviewed

$1,000+

$25 - $49 / hr

2 - 9

Sofia, Bulgaria

Services provided

25% Application Testing

40% Mobile App Development

25% Custom Software Development +1 service

10% Social Media Marketing

In Sofia, Bulgaria, Populosoft is a mobile app development company. Founded in 2025, the team offers Mobile App Development and Custom Software Development.
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Web Publishing House

Not yet reviewed

$10,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Services provided

10% Application Testing

30% Mobile App Development

30% Web Development +2 services

20% IT Strategy Consulting

10% UX/UI Design

Web Publishing House is a mobile application development firm. Their small team is based in Sofia, Bulgaria. Their services include Mobile App Development and Web Development.
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SoftConsultGroup

Not yet reviewed

$10,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Services provided

10% Application Testing

50% Custom Software Development

20% Mobile App Development +1 service

20% Web Development

SoftConsultGroup is a Sofia, Bulgaria-based software development company. Their services include Custom Software Development and Mobile App Development.
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Top Software Testing Companies in Sofia

List of the Top Sofia QA Testers

Reviews mention Knowledgeable

QA Test Suite Dev & Maintainance for Security Platform

Reviewed 8 times in the past 6 months

Average Project Cost Breakdown

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Reviews mention Flexible

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Product Development for Engagement SaaS Provider

App Development Services for Medical Cannabis Co

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Scalefocus is very responsive

Reviews mention Exceptional results

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Reviews mention Autonomous

Mobile App Testing for Children's Products Company

Reviewed 5 times in the past 6 months

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BetterQA Independent Testing Solutions

Reviews mention Detail-oriented

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Reviews mention Communicative

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Reviewed 2 times in the past 6 months

Mobile App Development for Healthcare Company

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App Streams Ltd is very responsive

Reviews mention Innovative

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Reviews mention Trustworthy

Interactive Video for Online Medical Training Company

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