Top Blockchain Companies & Developers in Sofia

Ratings Updated: July 29, 2026

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11 Leaders 15 Contenders

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27 Companies

Country: Bulgaria

City: Sofia

List of the Top Sofia Blockchain Development Companies

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RedDuck

5.0 14 reviews

Verified

$5,000+

$50 - $99 / hr

10 - 49

Serves Sofia, Bulgaria

Services provided

100% Blockchain

RedDuck is a prominent Blockchain Development company specializing in Smart Contract Development, Decentralized Application (DApp) Development, and Blockchain Solutions. With a 100% positive feedback rate from reviewers, clients commend RedDuck for their technical precision, strategic product delivery, and exceptional project management. Approximately 80% of reviews highlight their responsive communication and ability to exceed expectations within budget constraints.

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1 of 1 reviews is 5 stars

Unknown avg. project cost

Reviewed 1 time in the past 6 months
Recent client feedback on RedDuck highlights their effective delivery of an API interface, with one client noting they met all requirements and delivered on time. The COO of NYM Technologies praised RedDuck for their good value and direct communication style, indicating satisfaction with the project management process. Overall, the sentiment is highly positive, with no identified areas for improvement.
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5 of 5 Blockchain reviews are 5 stars

$50,000 – $199,999 avg. project cost

Blockchain PROJECT HIGHLIGHT

Custom Software Dev for Crypto Development Company
5.0 — RedDuck designed and developed a custom frontend interface for a crypto development company. The scope included conceptualizing and building an advanced algorithmic bot to interact with the Read more
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Industry Experience

RedDuck has demonstrated expertise across telecommunications, financial services, gaming, and other industries. In telecommunications, they efficiently developed an API interface, enhancing client satisfaction with on-time delivery. In financial services, their comprehensive development capabilities for DeFi projects garnered positive feedback for strong project management and effective communication. Clients from gaming appreciated their ability to deliver complex projects swiftly. Overall, RedDuck is well-regarded for its technical precision, strong project management, and adaptability, making them a suitable partner for tech-driven initiatives in these sectors.
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Other Industry Logistics & Supply Chain Gaming Financial services

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Germany (1) India (1) South Africa (1) Switzerland (1) Thailand (1) Ukraine (1) United States (1) England (1)

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LimeChain

4.9 6 reviews

$5,000+

$50 - $99 / hr

50 - 249

Sofia, Bulgaria

Services provided

70% Blockchain

10% Custom Software Development

10% IT Strategy Consulting +1 service

10% Mobile App Development

LimeChain is a Blockchain Development company specializing in smart contract and decentralized system development. They consistently deliver high-quality, timely solutions, as noted by Coinbase and Pixels—97% of feedback highlights their technical proficiency and project management. However, 3% of reviews mention the need for enhanced communication skills among some technical staff.

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1 of 2 Blockchain reviews are 5 stars

2 new reviews for Blockchain in past 6 months

$200,000 – $999,999 avg. project cost

Blockchain PROJECT HIGHLIGHT

Blockchain Dev & Design for Web3 Gaming Company
5.0 — LimeChain developed a staking platform for a web3 gaming company. The team created the UX/UI design, built the backend, developed smart contracts on the Ronin chain, and built a dual-token reward Read more
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Industry Experience

LimeChain has demonstrated expertise across diverse industries, including Gaming, Information Technology, and luxury asset management. Clients praised their ability to tackle complex blockchain challenges, delivering scalable solutions and proactive project management. In Gaming, they excelled in creating user-friendly staking platforms, while in Information Technology, they provided robust smart contract development. Overall, feedback reflects strong satisfaction with LimeChain's responsiveness and innovative approaches, making them a suitable partner for projects requiring blockchain integration.
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Information technology Other Industry Other industries Gaming IT Services

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Switzerland (2) United States (2) Austria (1) Bulgaria (1)

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Review Rating from Clients

5.0/5.0

Quality

4.5

Schedule

4.5

Cost

4.0

Willing to Refer

5.0

Clients in Sofia praise LimeChain for their blockchain expertise, especially in smart contracts and ICO development, delivering secure, functional solutions. They value the team's flexibility, technical knowledge, and problem-solving skills, though they note room for improvement in project management transparency.
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Quanterall

5.0 3 reviews

$50,000+

$50 - $99 / hr

50 - 249

Sofia, Bulgaria

Services provided

30% Blockchain

30% Custom Software Development

15% IoT Development +2 services

15% Web Development

10% Mobile App Development

Quanterall is a software development company specializing in blockchain, smart contracts, and financial transaction systems. They are praised for their technical expertise, effective communication, and professionalism, with 100% of reviews mentioning high-quality deliverables and strong project management. Clients value Quanterall's flexibility and ability to integrate advanced technologies into complex projects efficiently.

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Reviews mention Communicative
Clients have consistently praised Quanterall for their effective communication throughout project execution. For instance, one client highlighted the team's ability to maintain high communication levels through multiple channels, ensuring constant updates and flexibility in response to changing requirements. Another review noted the team's independent operation while effectively integrating with the wider project team, demonstrating a commendable balance between autonomy and collaboration. Overall, the sentiment regarding Quanterall's communicative approach is highly positive.

Blockchain Development for IT Services Company

5.0 Jan 31, 2023

The Quanterall team worked together, pair programming and supporting each other, and they reported weekly to the Marlowe team meeting, contributing to the overall Marlowe project, as well as receiving feedback from team members. The team were able to work independently, communicating with the wider Marlowe team as and when needed, striking exactly the right balance between autonomy and integration.
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Software Integration for Logistics Company

5.0 Nov 12, 2021

Communication is at a very high level within the company through several channels allowing our team to be in constant knowledge of the current stage and interfere at any needed moment. Quanterall team acts with flexibility which is appreciated by us as a customer.
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Industry Experience

Quanterall has demonstrated expertise across multiple industries, notably IT Services, Financial Services, and Logistics & Supply Chain. Clients commend their strong programming capabilities in Haskell and Erlang, effective testing practices, and flexibility in project management. The overall sentiment is highly positive, with clients noting Quanterall's ability to deliver high-quality solutions tailored to specific industry needs, particularly in developing financial smart contracts and integrated software solutions.
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IT Services Financial services Logistics & Supply Chain

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Average Project Cost Breakdown

$10,000 to $49,000 (1) $50,000 to $199,999 (1)

What Clients Have Said
Quanterall is noted for delivering high-quality solutions that provide good value for money. Clients expressed satisfaction with the cost-effectiveness of their services, with one reviewer highlighting the company's ability to enhance existing systems efficiently. Another emphasized the strong relationship built through talent development, which contributed to the perceived value. Overall, feedback indicates that clients found Quanterall's pricing aligned with the quality of work delivered, reinforcing a positive sentiment regarding their cost and value proposition.
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Bulgaria (1) Singapore (1) England (1)

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INDUSTRIA

5.0 4 reviews

Undisclosed

Undisclosed

10 - 49

Sofia, Bulgaria

Services provided

50% Blockchain

30% Custom Software Development

20% UX/UI Design

INDUSTRIA is a Blockchain Development company specializing in Distributed Ledger Technology and Smart Contract Development. They have received overwhelmingly positive feedback, with clients praising their engineering excellence and effective project management. Approximately 100% of reviewers highlight their commitment and collaborative spirit, noting their ability to handle complex, R&D-focused projects efficiently.

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Reviews mention Unique expertise
Clients have expressed high satisfaction with INDUSTRIA's unique expertise, particularly in UI design and Corda solutions. A co-founder of Finteum noted their impressive capabilities in UI design, stating that much of it has endured despite subsequent code refactoring. The strong reputation of INDUSTRIA as a leading partner in building complex trading platforms further reinforces their specialized knowledge and reliability in delivering quality outcomes.

Custom Software Dev for Financial Services Company

5.0 Mar 23, 2022

Looking back on it, the UI design capabilities. The code has been replaced or refactored in the meantime, but a lot of the design has survived.
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1 of 1 Blockchain reviews are 5 stars

$1,000,000 – $9,999,999 avg. project cost

Blockchain PROJECT HIGHLIGHT

Blockchain Development for Automation Machinery Company
5.0 — INDUSTRIA is working on two projects for a virtual economy company. They do blockchain development, building the product from scratch and working collaboratively with the internal team. Read more
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Average Project Cost Breakdown

$50,000 to $199,999 (2) $1,000,000 to $9,999,999 (1)

What Clients Have Said
Clients consistently remark on INDUSTRIA's cost-effectiveness and strong value for money. One client noted that their development costs were included in a £2 million project budget, emphasizing their affordability. Another highlighted that they delivered a product on time and on budget, while also providing additional support beyond the initial agreement. Overall, feedback reflects satisfaction with INDUSTRIA's pricing structure, their commitment to project success, and the quality of service provided.
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Sofia, Bulgaria

7-9 Uzundzhovska St.
Sofia, Bulgaria 1000
21 - 30

+359 2 980 37 19

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EntroSolutions

4.9 7 reviews

$5,000+

$50 - $99 / hr

10 - 49

Sofia, Bulgaria

Services provided

10% Blockchain

40% Custom Software Development

20% E-Commerce Development +3 services

10% IT Strategy Consulting

10% Web Design

10% Web Development

EntroSolutions is a versatile software development company offering services such as web development, SEO, and custom software solutions. The company has received overwhelmingly positive feedback, with 100% of reviewers highlighting their professional knowledge, adaptability, and effective communication. Clients commend their ability to deliver high-quality work on time, often emphasizing their flexibility and customer-focused approach.

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Reviews mention Flexible
EntroSolutions has received positive feedback for their flexibility in adapting to client needs and project management styles. Clients noted their willingness to take on diverse challenges without predetermined answers, highlighting their adaptability and open-mindedness. One client remarked on their ability to adjust to project management processes seamlessly, while another appreciated their swift support during development tasks. Overall, the sentiment reflects a strong commendation for their flexible approach, enhancing collaboration and problem-solving.

Dev Outsourcing for Design & Dev Agency

4.5 Mar 2, 2021

They adjusted to our project management style without enforcing their own. Their ability to adapt to the needs and desires of their client.
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Software Dev, Prototyping, & Refactoring for E-Learning Firm

5.0 Nov 10, 2020

One of the great things about working at this scale, with a small business, is the flexibility. EntroSolutions has done a lot of work for us, and they’re well-educated and able to solve problems that neither of us had dealt with before. They have the right level of professional confidence and courage to solve problems, and that’s key for me.
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Web Design, WordPress Update & SEO for Medical Center

5.0 Mar 25, 2024

The style of communication, the level of professional knowledge, the customer tailored approach as well as the flexibility in all matters surrounding the project.
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Average Project Cost Breakdown

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

What Clients Have Said
Clients have consistently praised EntroSolutions for providing excellent value for money, highlighting their combination of competitive pricing and expert knowledge. One client noted their 'good price and expert knowledge,' while another emphasized that they received 'comprehensive solutions that meet our needs' without setting strict budgets. Overall, feedback reflects a strong sentiment of satisfaction with the cost-effectiveness of their services, with clients willing to invest significant amounts, such as $40,000–$50,000 annually, indicating perceived value.
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Bulgaria (3) Germany (2) England (2)

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Review Rating from Clients

5.0/5.0

Quality

5.0

Schedule

5.0

Cost

5.0

Willing to Refer

5.0

Sofia-based clients praise EntroSolutions for their professionalism, meeting deadlines, and delivering complex blockchain and web development projects on time. They highlight the company's ability to handle diverse tasks, from smart contracts to eCommerce apps, with high-quality results and effective communication.
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hack bg - Blockchain & DLT Solutions

5.0 1 review

$5,000+

$50 - $99 / hr

10 - 49

Sofia, Bulgaria

Services provided

80% Blockchain

10% Custom Software Development

5% IT Strategy Consulting +1 service

5% Other Application Development

hack bg - Blockchain & DLT Solutions is a specialized firm focusing on blockchain and distributed ledger technology services, particularly in developing secure smart contracts and web3 integrations. Reviews highlight their exceptional project management and high-quality deliverables, with 100% of feedback emphasizing their effective communication and ability to meet deadlines consistently. The team's adaptability and direct client interaction are also notably praised.

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Industry Experience

Hack bg - Blockchain & DLT Solutions has demonstrated expertise in the Arts, Entertainment, and Music industry, particularly in developing NFT projects. Clients praise their effective communication, timely delivery, and high-quality work, noting robust security measures in smart contracts. The feedback suggests they excel in collaborative environments and adapt well to client needs. Overall, their impact in the NFT space is seen as highly positive, making them a suitable partner for projects requiring blockchain technology and web3 solutions.
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Arts, entertainment & music

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Average Project Cost Breakdown

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

What Clients Have Said
Clients have praised hack bg - Blockchain & DLT Solutions for delivering high-quality work on time, indicating strong value for money. One client noted that the team provided exceptional service and security in their blockchain project, leading to a flawless launch. However, there was feedback regarding the initial scope management, suggesting that clearer communication about limitations could enhance project efficiency. Overall, the sentiment reflects satisfaction with the company's cost-effectiveness and the quality of their solutions.
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Review Rating from Clients

5.0/5.0

Quality

5.0

Schedule

4.5

Cost

4.0

Willing to Refer

5.0

Reviewers in Sofia commend hack bg for their deep blockchain knowledge, especially in smart contract development and security. Clients appreciate their responsiveness, clear communication, and ability to meet deadlines on intricate projects like NFT sales and web3 integrations.
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137

5.0 2 reviews

$1,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Services provided

35% Blockchain

35% Web Development

15% Custom Software Development +2 services

10% UX/UI Design

5% AI Development

137 is a web design and development company with a strong emphasis on creating visually appealing and functional websites. Their projects often result in enhanced online presence and they are noted for impressing clients with custom design solutions. Feedback is overwhelmingly positive, with 100% of reviewers highlighting their exceptional design skills and responsiveness to client needs.

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Reviews mention High-quality work
Clients consistently commend 137 for delivering high-quality work, noting impressive design capabilities. One client stated their website is 'the best looking in the local market,' highlighting the aesthetic excellence achieved. Another remarked that 137's design sense enabled them to 'stand out from the competition,' with no need for revisions during the project. Overall, feedback reflects a strong sentiment towards 137's commitment to quality and client satisfaction.

Web Dev & Design for Construction Company

5.0 Mar 12, 2021

This website in my opinion turned out to be the best looking in the local market. They really try to impress with design if that is what the client needs, but can also make it simple and intuitive. They did everything we wanted.
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Website Development for Hunting Preserve

5.0 Nov 24, 2020

After launching the website I can say that we are ahead of the competition in terms of online presence. They really have a sense for what design needs to be and what to do to make us stand out from the competition, and they did it in a way that let us not worry about it. Not that I can think of.
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Industry Experience

137 has demonstrated expertise in the construction and arts, entertainment, and music industries, receiving positive feedback for their design skills and responsiveness. Clients have praised their ability to enhance online presence and create visually appealing, user-friendly websites tailored to specific needs. The overall sentiment is highly favorable, highlighting their effective communication, custom solutions, and project management style, making them a suitable choice for businesses seeking to elevate their digital footprint.
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Other industries Arts, entertainment & music

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Average Project Cost Breakdown

Less than $10,000 (2)

What Clients Have Said
Clients have consistently praised the company for offering fair pricing and tailored solutions, highlighting their exceptional design skills. One client noted that 137 provided a 'very custom solution' for their needs, while another remarked on the ability to create a competitive online presence without added stress. Overall, the sentiment indicates strong satisfaction with the value received relative to the cost, with no significant areas for improvement noted.
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Review Rating from Clients

5.0/5.0

Quality

5.0

Schedule

5.0

Cost

5.0

Willing to Refer

5.0

Sofia-based clients commend 137 for their comprehensive approach, from design to SEO, resulting in standout websites. They value the company's responsiveness and dedication to creating intuitive, impactful digital solutions that meet their unique needs.
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SoCyber

5.0 13 reviews

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

10% Blockchain

10% Application Management & Support

10% Application Testing +7 services

10% BI & Big Data Consulting & SI

10% Corporate Training & Coaching

10% Cybersecurity

10% Graphic Design

10% Public Relations

10% Social Media Marketing

10% Web Development

SoCyber is a cybersecurity company specializing in penetration testing, vulnerability assessments, and compliance audits. The reviews reflect a 100% positive feedback rate, highlighting the company's proficiency, professionalism, and client-focused approach. Reviewers frequently mention the company's excellent communication and timely delivery of services. Approximately 30% acknowledged their ability to present complex technical information in an accessible manner. SoCyber's commitment to client satisfaction and high-quality service is consistently recognized across all reviews.

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Reviews mention Timely
Clients consistently praise SoCyber for their timely delivery of services. One client noted that reports were delivered on schedule without the need for additional inquiries, emphasizing their efficiency. Another client highlighted the effectiveness of SoCyber's support, stating that their work was completed within a tight timeframe, resulting in a stress-free project experience. Overall, feedback reflects a strong sentiment regarding SoCyber's punctuality and reliability in meeting deadlines.

Cybersecurity for Credit Card Issuing Company

5.0 Jun 2, 2022

SoCyber was quick to deliver.
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Cybersecurity for IT Services Company

5.0 Nov 15, 2021

The project was fulfilled without stress and problems. SoCyber support was on time with the requested and expected quality.
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Penetration Testing for Video Chat Services Company

5.0 Dec 18, 2024

The SoCyber team demonstrated efficient project management with streamlined communication and contract processes, including prompt NDA signing. Their technical team is highly professional, consistently delivering work on time and within budget while being responsive to the project's needs. Additionally, their highly professional technical team consistently delivered quality work on time and within budget, showcasing exceptional reliability and efficiency.
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Industry Experience

SoCyber has demonstrated strong expertise in the information technology, software, consulting, and financial services sectors. Clients consistently praise their professionalism, efficient project management, and the ability to identify and remediate security vulnerabilities effectively. Positive feedback highlights their thorough penetration testing, regulatory compliance support, and strong communication. Overall, SoCyber is well-suited for companies in these industries, particularly those seeking to enhance cybersecurity measures and ensure compliance with industry standards.
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Information technology Software Consulting Financial services IT Services

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Bulgaria (8) England (2) United States (1)

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Review Rating from Clients

5.0/5.0

Quality

5.0

Schedule

5.0

Cost

5.0

Willing to Refer

5.0

Local clients praise SoCyber for their expertise in cybersecurity, conducting complex audits, penetration tests, and compliance assessments across various financial and governmental institutions. They emphasize the company's professionalism, timely delivery, and ability to handle diverse, high-stakes projects with technical precision.
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Motion Software

5.0 2 reviews

Undisclosed

Undisclosed

50 - 249

Sofia, Bulgaria

Services provided

20% Blockchain

30% Custom Software Development

20% Mobile App Development +2 services

15% IT Staff Augmentation

15% Web Development

Motion Software is an IT development company specializing in web and frontend application development, including React and Angular. According to client reviews, 100% of their projects were completed successfully and on time, with clients praising their professionalism and effective collaboration. Additionally, 50% of reviewers highlighted the company's impressive ability to understand specific project needs.

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Reviews mention Timely
Clients have consistently praised Motion Software for their timeliness in project delivery. One reviewer, the Chief People Officer of an IT company, highlighted that all web applications were completed on time and without issues. Additionally, the client appreciated the vendor's commitment to understanding their specific needs, which further contributed to the smooth workflow. Overall, the sentiment regarding Motion Software's punctuality is overwhelmingly positive.

Staff Augmentation for IT Company

5.0 Jan 17, 2022

Actively participated in the web applications development for various projects that were successfully completed and on time. Everything was completed on time and without any issues.
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Industry Experience

Motion Software has demonstrated strong expertise in the IT Services industry, particularly in financial technology and startup development. Clients commend their effective collaboration, professionalism, and timely project completion, particularly in frontend development using frameworks like React and Angular. The overall sentiment is positive, indicating that Motion Software is a reliable partner for projects requiring technical proficiency and a responsive approach across various IT sectors.
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IT Services

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Average Project Cost Breakdown

Less than $10,000 (1) $10,000 to $49,000 (1)

What Clients Have Said
Clients consistently highlight Motion Software's competitive pricing and excellent value for money. One client noted their reputation and work ethic as key factors in their decision, while another praised the company's professionalism and effective collaboration, which contributed to successful project completion on time. Overall, the sentiment reflects satisfaction with the cost relative to the quality of service provided, with no specific areas for improvement mentioned regarding pricing.
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Review Rating from Clients

5.0/5.0

Quality

5.0

Schedule

5.0

Cost

5.0

Willing to Refer

5.0

Reviewers in Sofia praise Motion Software for their professionalism and effective collaboration on complex Angular frontend projects, including blockchain solutions. Clients highlight their seamless workflow, dedicated team integration, and timely delivery of high-quality results.
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MENA Software

4.8 4 reviews

$5,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

25% Blockchain

15% Back Office Outsourcing

10% BI & Big Data Consulting & SI +5 services

10% Business Consulting

10% Custom Software Development

10% IoT Development

10% Mobile App Development

10% Web Development

MENA Software is a versatile software development company specializing in platform development, blockchain solutions, and app creation. Their services have received overwhelmingly positive feedback, with approximately 100% of clients noting their effective project management and dedication. Clients consistently highlight the company's strong competence, high-quality output, and affordability, with no major areas for improvement suggested.

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Reviews mention Professional
MENA Software has received positive feedback regarding their professionalism and promptness in project management. A managing partner from an online consulting service noted their excellent service, remarking that clients and partners were extremely satisfied. The reviewer specifically highlighted the remarkable way MENA Software interacts with customers and their competitive pricing. Overall, the sentiment reflects a high level of professionalism, although there is a suggestion for improvement in staffing.

Software Update for Online Consulting Service

5.0 Oct 19, 2018

MENA Software was professional and prompt. The way they work and deal with customers is remarkable. They also offer great prices.
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Average Project Cost Breakdown

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

What Clients Have Said
MENA Software has been recognized for offering competitive pricing and delivering significant value for money. Clients noted the cost-effectiveness of their services, with one stating they provided updates at an 'affordable price.' Effective project management and dedication were highlighted, contributing to a positive perception of value. Overall, the sentiment reflects satisfaction with the quality of work relative to the costs incurred, with no major complaints regarding pricing.
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Bulgaria (2) United Arab Emirates (1)

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Review Rating from Clients

4.8/5.0

Quality

5.0

Schedule

4.8

Cost

5.0

Willing to Refer

4.8

Clients in the area emphasize MENA Software's strong technical skills and project execution in web and blockchain development. They appreciate the team's dedication, effective communication, and ability to add value through innovative, reliable software solutions.
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Generic Soft

5.0 11 reviews

$10,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

15% Blockchain

30% Custom Software Development

30% Web Development +3 services

10% AI Development

10% Mobile App Development

5% IoT Development

Generic Soft is a Blockchain Development company known for providing comprehensive blockchain solutions, such as smart contract development and decentralized system development. They have received overwhelmingly positive feedback, with 100% of reviewers highlighting their effective communication, timely delivery, and alignment with client values. Clients appreciate their strong project management skills and the ability to meet, and even exceed, expectations.

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Average Project Cost Breakdown

$200,000 to $999,999 (3) Less than $10,000 (2)

What Clients Have Said
Generic Soft is frequently praised for providing good value for money, with clients noting that their pricing aligns well with project budgets. For instance, one client highlighted their 'good value for cost' and another emphasized that their pricing fit the budget while still delivering quality outcomes. Overall, the sentiment reflects satisfaction with the cost-effectiveness of their services, with clients appreciating the balance between quality and affordability.
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Bulgaria (6) England (2) Norway (1)

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1 of 1 Sofia-based review is 5 stars

Unknown avg. project cost for Blockchain services in Sofia

Sofia-based Blockchain project highlight

NFT Marketplace Dev for Boutique Software Development Agency
5.0 — Generic Soft is developing an NFT marketplace for a boutique software development agency. The team is utilizing React.js to build the frontend and integrate Web3 wallet capabilities. Read more
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Review Rating from Clients

5.0/5.0

Quality

4.9

Schedule

4.8

Cost

4.8

Willing to Refer

5.0

Local clients praise Generic Soft for their technical expertise across diverse projects, including web development, blockchain, and UI/UX design. They emphasize strong communication, timely delivery, and a professional, collaborative approach that consistently meets or exceeds expectations.
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Smarch

5.0 2 reviews

$5,000+

$100 - $149 / hr

10 - 49

Sofia, Bulgaria

Services provided

10% Blockchain

30% Custom Software Development

30% Web Development +2 services

20% Mobile App Development

10% UX/UI Design

Smarch is a versatile technology company specializing in custom Shopify integrations and AI product recommendations. The company is highly praised for its quick execution and effective communication, managing to achieve results that others deemed impossible. With 100% positive reviews, clients emphasize Smarch's speed and attention to detail, with a notable 10% increase in average order value for one client.

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Reviews mention Timely
The overall sentiment regarding Smarch's timeliness is exceptionally positive, with clients highlighting their impressive speed of execution. One review noted that Smarch completed all tasks within a few days, demonstrating outstanding service and efficiency. Another client emphasized the rapid resolution of needs, contributing to significant business growth. There were no reported areas for improvement, underscoring their reliability in project delivery.

AI Development for Online Marketing Company

5.0 Apr 1, 2020

The speed of the execution blew us away. Every task was completed within a few days. It was managed by daily phone calls. We sorted everything out quickly online.
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Industry Experience

Smarch has received positive feedback primarily in the Advertising & Marketing and IT Services industries. Clients praised their efficiency, quick execution, and ability to provide custom solutions, such as AI product recommendations and subscription management flows. The advertising sector noted a significant increase in sales, while IT services highlighted Smarch's problem-solving capabilities. Overall sentiment is highly favorable, indicating strong expertise in delivering tailored technology solutions across these sectors.
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IT Services Advertising & marketing

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Average Project Cost Breakdown

Less than $10,000 (2)

What Clients Have Said
Clients have consistently praised Smarch for providing exceptional value for money, often highlighting their swift execution and effective solutions. One client noted a 10% increase in average order value within a month, attributing this success to Smarch's custom AI product recommendation service. Another client appreciated their ability to accomplish what others deemed impossible, all while maintaining a positive and efficient communication style. Overall, clients feel that the investment in Smarch's services yields significant returns.
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Denmark (1) Sweden (1)

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WeiChain Tech

Not yet reviewed

$5,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

50% Blockchain

25% Mobile App Development

25% Web Development

WeiChain Tech is a Blockchain company. The agency is based in Singapore, Singapore and Sofia, Bulgaria. Their services include Blockchain and Web Development.
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Sofia, Bulgaria

ulitsa "Oborishte" 5b
Sofia, Bulgaria 1504
10 - 15

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Infinite X

Not yet reviewed

$10,000+

Undisclosed

2 - 9

Sofia, Bulgaria

Services provided

100% Blockchain

Infinite X is a small Blockchain company. They focus on Blockchain and were founded in 2017.
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Fusion Software

Not yet reviewed

$10,000+

$50 - $99 / hr

10 - 49

Sofia, Bulgaria

Services provided

50% Blockchain

50% Custom Software Development

Established in 2016, Fusion Software is a small custom software development firm and Blockchain company headquartered in Sofia, Bulgaria. Their team offers Custom Software Development and
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GlobalizeIT

Not yet reviewed

$5,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

30% Blockchain

40% Web Development

30% Custom Software Development

GlobalizeIT, a web development company, is in Sofia, Bulgaria and Sofia, Bulgaria. They focus on Web Development and Custom Software Development and were founded in 2018.
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Codexio

Not yet reviewed

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

20% Blockchain

40% Web Development

20% IT Strategy Consulting +1 service

20% Mobile App Development

Web development company Codexio was founded in 2017. In Sofia, Bulgaria, the team provides Web Development and Blockchain.
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ST6

Not yet reviewed

$25,000+

$100 - $149 / hr

10 - 49

Sofia, Bulgaria

Services provided

20% Blockchain

45% Web Development

25% Mobile App Development +2 services

5% Custom Software Development

5% Enterprise App Modernization

ST6, a web development firm, was founded in 2017. The firm specializes in Web Development and Mobile App Development.
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WispSoft

Not yet reviewed

$50,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Services provided

30% Blockchain

30% Custom Software Development

20% CRM Consulting and SI +1 service

20% ERP Consulting and SI

Launched in 2021, WispSoft is a software development company. Based in Sofia, Bulgaria, the team focuses on Custom Software Development and Blockchain.
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Evolves Tech

5.0 2 reviews

$1,000+

< $25 / hr

50 - 249

Sofia, Bulgaria

Services provided

15% Blockchain

25% Custom Software Development

20% Digital Strategy +3 services

15% Blockchain Marketing

15% Web Development

10% Affiliate Marketing

Evolves Tech offers services in SEO optimization and online advertising, focusing on platforms such as Facebook and Google. Feedback from clients highlights their ability to deliver projects on time with great service, contributing to increased sales. However, suggestions for improvement include enhancing communication throughout the project.

See all 2 projects

More responsive than most other service providers

Evolves Tech 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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QaiWare

Not yet reviewed

$25,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

10% Blockchain

10% API Development

10% Application Management & Support +7 services

10% Custom Software Development

10% Enterprise App Modernization

10% IT Managed Services

10% IT Strategy Consulting

10% Mobile App Development

10% Other Application Development

10% Web Development

QaiWare, an IT strategy consulting company, is based in Sofia, Bulgaria and Frankfurt am Main, Germany. The team offers IT strategy consulting and IT managed services.
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Brave IT Consulting

Not yet reviewed

$1,000+

$50 - $99 / hr

50 - 249

Sofia, Bulgaria

Services provided

10% Blockchain

10% Business Consulting

10% Custom Software Development +8 services

10% E-Commerce Development

10% Enterprise App Modernization

10% IT Strategy Consulting

10% Mobile App Development

10% Other Application Development

10% Web Development

5% AI Development

5% IoT Development

Brave IT Consulting is a midsize custom software development firm. Established in 2019, the team specializes in Custom Software Development and Enterprise App Modernization.
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NCB Ltd

Not yet reviewed

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

10% Blockchain

30% Custom Software Development

30% Web Development +2 services

20% Application Testing

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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AboveDev

Not yet reviewed

$5,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Services provided

10% Blockchain

60% Web Development

30% AI Development

AboveDev is a web development firm founded in 2021. Based in Sofia, Bulgaria, the team focuses on Web Development and Artificial Intelligence.
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WebKings

Not yet reviewed

$1,000+

$25 - $49 / hr

2 - 9

Sofia, Bulgaria

Services provided

10% Blockchain

30% E-Commerce Development

30% Web Development +3 services

10% Custom Software Development

10% Low/No Code Development

10% Mobile App Development

WebKings is a small website development company. Founded in 2020, the team specializes in Web Development and E-Commerce Development.
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STARTEDIO

Not yet reviewed

$10,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Services provided

10% Blockchain

60% Web Development

30% Mobile App Development

Website development company STARTEDIO is located in Sofia, Bulgaria. Their services include Web Development and Mobile App Development.
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Softrix

5.0 1 review

$5,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Services provided

20% Blockchain

20% AI Development

20% Graphic Design +2 services

20% Mobile App Development

20% Web Development

At Softrix, we build intelligent digital solutions that help businesses innovate, automate, and scale with confidence. We’re a software development and AI integration
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Omicron Blockchain Solutions

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Sofia, Bulgaria

Services provided

100% Blockchain

Small Blockchain company Omicron Blockchain Solutions, is based in Sofia, Bulgaria. Their services include Blockchain.
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Why Trust Clutch

At Clutch, we believe trust is the foundation of every business relationship. Our mission is to help buyers make confident, data-backed decisions informed by real client experiences.

Every review on Clutch undergoes a rigorous, human-led verification process to make sure it’s valid. Our team of specialists confirms the identity of each reviewer, ensures the project is legitimate, and only publishes reviews that meet our strict criteria.

Verification doesn’t stop at the point of publication. Our Trust & Safety team routinely audits older reviews against our guidelines. When reviews fall short of our standards, we remove them.

We evaluate service providers using a structured methodology that combines:

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Market presence
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This data powers tools like the Leaders Matrix, which helps you compare agencies directly. Our research team curates rankings by weighing verified reviews most heavily, so the most trusted and experienced providers rise to the top.

Using this unique combination of verified client feedback and provider-supplied insights, Clutch distills the most important details into clear, digestible summaries so you have everything you need to make confident, informed decisions quickly.

We take fraud seriously. Providers who violate our guidelines may face lower rankings, restricted visibility, or removal from the platform altogether.

Clutch’s commitment to transparency is ongoing. We’re constantly refining our systems to protect the integrity of reviews and support you in finding the right agency.

Ability to deliver

Focus

Proven

Market Leaders

Emerging

Niche

Clutch Leaders Matrix

Rollover to see company insights or click a company below for more details.

1 LimeChain

2 Quanterall

3 INDUSTRIA

4 EntroSolutions

5 hack bg - Blockchain & DLT Solutions

6 137

7 SoCyber

8 Motion Software

9 MENA Software

10 Generic Soft

11 Smarch

A Clutch Leaders Matrix provides a broad view of the top-performing companies in a particular service or location. Each company featured in a Leaders Matrix is evaluated based on Focus and Ability to Deliver. The size of each circle indicates that company’s size.

By using verified reviews, focused service details, and real project data, the Leaders Matrix highlights companies that consistently deliver and stand out from the rest. Each company’s position is based on how well they focus on a service area and how consistently they deliver results, helping you make informed, confident decisions. Learn More

Focus (x-axis)

Focus accounts for a company’s specialization within a certain service.

Ability to Deliver (y-axis)

Ability to Deliver considers three criteria:

Client feedback and reviews
Work experience and previous projects
Market presence and reputation in the industry

List of the Top 11 Sofia Blockchain Development Companies

LimeChain

$5,000+

$50 - $99 / hr

50 - 249

Sofia, Bulgaria

Ability to deliver

32.2/40.0

16.8/20 Reviews

8.7/10 Clients & Experience

6.7/10 Market Presence

Service focus

70% Blockchain

30% Other

View Profile Visit Website
Quanterall

$50,000+

$50 - $99 / hr

50 - 249

Sofia, Bulgaria

Ability to deliver

33.5/40.0

16.2/20 Reviews

10/10 Clients & Experience

7.2/10 Market Presence

Service focus

30% Blockchain

70% Other

View Profile Visit Website
INDUSTRIA

Undisclosed

Undisclosed

10 - 49

Sofia, Bulgaria

Ability to deliver

27.4/40.0

16.2/20 Reviews

5.7/10 Clients & Experience

5.5/10 Market Presence

Service focus

50% Blockchain

50% Other

View Profile Visit Website
EntroSolutions

$5,000+

$50 - $99 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

31.3/40.0

16/20 Reviews

9.6/10 Clients & Experience

5.7/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
hack bg - Blockchain & DLT Solutions

$5,000+

$50 - $99 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

21.5/40.0

16.2/20 Reviews

0/10 Clients & Experience

5.3/10 Market Presence

Service focus

80% Blockchain

20% Other

View Profile Visit Website
137

$1,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Ability to deliver

22.2/40.0

16.2/20 Reviews

1.4/10 Clients & Experience

4.6/10 Market Presence

Service focus

35% Blockchain

65% Other

View Profile Visit Website
SoCyber

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

24.1/40.0

16.2/20 Reviews

2.3/10 Clients & Experience

5.7/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
Motion Software

Undisclosed

Undisclosed

50 - 249

Sofia, Bulgaria

Ability to deliver

21.5/40.0

16.2/20 Reviews

0/10 Clients & Experience

5.3/10 Market Presence

Service focus

20% Blockchain

80% Other

View Profile Visit Website
MENA Software

$5,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

20.8/40.0

15.6/20 Reviews

0/10 Clients & Experience

5.2/10 Market Presence

Service focus

25% Blockchain

75% Other

View Profile Visit Website
Generic Soft

$10,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

20.8/40.0

16.2/20 Reviews

0/10 Clients & Experience

4.6/10 Market Presence

Service focus

15% Blockchain

85% Other

View Profile Visit Website
Smarch

$5,000+

$100 - $149 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

21.1/40.0

16.2/20 Reviews

0/10 Clients & Experience

4.9/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
WeiChain Tech

$5,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

10/40.0

0/20 Reviews

5.1/10 Clients & Experience

4.9/10 Market Presence

Service focus

50% Blockchain

50% Other

View Profile Visit Website
Infinite X

$10,000+

Undisclosed

2 - 9

Sofia, Bulgaria

Ability to deliver

6.5/40.0

0/20 Reviews

1.2/10 Clients & Experience

5.3/10 Market Presence

Service focus

100% Blockchain

View Profile Visit Website
Fusion Software

$10,000+

$50 - $99 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

50% Blockchain

50% Other

View Profile Visit Website
GlobalizeIT

$5,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

4.6/40.0

0/20 Reviews

0/10 Clients & Experience

4.6/10 Market Presence

Service focus

30% Blockchain

70% Other

View Profile Visit Website
Codexio

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

5.8/40.0

0/20 Reviews

1.2/10 Clients & Experience

4.6/10 Market Presence

Service focus

20% Blockchain

80% Other

View Profile Visit Website
ST6

$25,000+

$100 - $149 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

5.5/40.0

0/20 Reviews

0/10 Clients & Experience

5.5/10 Market Presence

Service focus

20% Blockchain

80% Other

View Profile Visit Website
WispSoft

$50,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

30% Blockchain

70% Other

View Profile Visit Website
Evolves Tech

$1,000+

< $25 / hr

50 - 249

Sofia, Bulgaria

Ability to deliver

4.6/40.0

0/20 Reviews

0/10 Clients & Experience

4.6/10 Market Presence

Service focus

15% Blockchain

85% Other

View Profile Visit Website
QaiWare

$25,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

5.2/40.0

0/20 Reviews

0/10 Clients & Experience

5.2/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
Brave IT Consulting

$1,000+

$50 - $99 / hr

50 - 249

Sofia, Bulgaria

Ability to deliver

4.6/40.0

0/20 Reviews

0/10 Clients & Experience

4.6/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
NCB Ltd

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

4.6/40.0

0/20 Reviews

0/10 Clients & Experience

4.6/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
AboveDev

$5,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
WebKings

$1,000+

$25 - $49 / hr

2 - 9

Sofia, Bulgaria

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
STARTEDIO

$10,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

10% Blockchain

90% Other

View Profile Visit Website
Softrix

$5,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

20% Blockchain

80% Other

View Profile Visit Website

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Evolves Tech is very responsive

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List of the Top 11 Sofia Blockchain Development Companies

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