Top Application Modernization Services
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$5,000+$50 - $99 / hr10 - 49Montréal, Canada
Services provided
See all 9 projectsStackfee is a versatile software development company offering services such as website design, CRM systems, and app migrations. Reviews highlight their exceptional project management, speed, and efficiency, with 100% positive feedback emphasizing their ability to deliver timely solutions and personalized client engagement. Approximately 80% of clients appreciate their technical proficiency and collaborative approach, ensuring tailored and efficient outcomes.
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$25,000+$50 - $99 / hr10 - 49Zagreb, Croatia
Services provided
See all 3 projectsLeapwise is a technology services company specializing in customized software development and integration solutions, particularly for BSS/OSS platforms. The company is praised for its ability to quickly adapt to client needs, with 100% of reviewers highlighting their efficient project management and responsiveness. Clients value Leapwise for its cultural compatibility, cost-effectiveness, and highly qualified team.
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$1,000+$25 - $49 / hr10 - 49Sofia, Bulgaria
Services provided
See all 9 projectsBulgarian Software House - BSH is a technology company specializing in custom software development, with a strong focus on Microsoft technologies, including SharePoint and .NET. Across numerous reviews, clients consistently praise BSH for their deep technical expertise, professional project management, and ability to deliver projects on time and within scope. Approximately 100% of the reviewers highlighted the company’s friendly and collaborative approach, emphasizing their impressive knowledge-sharing capabilities.
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$10,000+$50 - $99 / hr10 - 49Warszawa, Poland
Services provided
See all 12 projectsSoftellar is a versatile IT solutions provider specializing in cloud migration, software development, and data analytics. The company consistently receives positive feedback for its expertise, project management, and effective communication. Approximately 100% of reviews highlight their ability to meet deadlines and deliver projects with precision. Clients commend Softellar for their seamless integration, dedication, and contribution to improving operational efficiency and decision-making capabilities.
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$5,000+$25 - $49 / hr50 - 249
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See all 8 projectsWebSenor is a comprehensive digital solutions company specializing in web development, mobile app development, and digital marketing services. The company receives positive feedback for their expertise in custom website development and mobile applications, with around 80% of reviews highlighting their professionalism and dedication. Clients commend their ability to meet deadlines and deliver on budget, though some suggest improved communication to address time zone challenges.
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$50,000+$300+ / hr50 - 249Whitby, Canada
Services provided
See all 1 projectsSimnet is an IT consulting company specializing in cloud solutions, managed services, end-user computing, and security. The reviews highlight their exceptional customer service, efficient project management, and ability to implement multi-cloud environments. Clients appreciate their communication and collaborative approach, with 100% of reviews expressing satisfaction and highlighting the company's ability to streamline processes and enhance productivity.
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$50,000+$50 - $99 / hr50 - 249Montréal, Canada
Services provided
See all 1 projectsAxamit is a digital transformation company specializing in Marketo Engage business consulting, application development, and support. Overall, the feedback is overwhelmingly positive, with 100% of reviews highlighting their timely delivery, proactive project management, and certified expertise as an Adobe partner. Moreover, 34% of reviewers noted increased campaign success, underscoring Axamit's effective solutions and strong client relationships.
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$10,000+$25 - $49 / hr10 - 49İSTANBUL, Türkiye
Services provided
See all 8 projectsAPPTECH SYSTEMS is a company specializing in Enterprise Application Modernization and digital transformation services. Reviews highlight their exceptional dedication to customer service, adaptability, and affordability, with a 100% positive feedback rate. Clients appreciate their expertise in systems integration, process automation, and providing outstanding UX/UI design services, reflecting a proactive approach and commitment to customer satisfaction.
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$25,000+$25 - $49 / hr250 - 999
Services provided
See all 6 projectsDelaplex is a versatile software development company offering services such as mobile and web application development, backend support, and custom software solutions. The company has received overwhelmingly positive feedback from clients, with approximately 100% of reviewers praising their industry understanding, flexibility, and collaborative approach. Delaplex's ability to integrate with client teams and adapt to specific requirements is frequently highlighted as a core strength.
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$5,000+$25 - $49 / hr50 - 249Semarang, Indonesia
Services provided
See all 5 projectsCrocodic is a premier software development company in Indonesia, specializing in web and mobile application development. Their reviews consistently highlight their technical expertise, timely project delivery, and responsive customer service. Impressively, they achieved a 99.9% system uptime and reduced user complaints by 95%. Notably, 100% of reviewers commend their project management and technical capabilities.
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$25,000+$25 - $49 / hr10 - 49Noida, India
Services provided
See all 3 projectsEPixelSoft® is a software development company specializing in automation tools, custom software development, and web applications, with expertise in Python and Salesforce integration. Reviews highlight the company's ability to deliver effective solutions and excellent communication, with 100% of reviewers noting their impressive problem-solving skills. While feedback is predominantly positive, some suggest improvements in team size and timeliness for smaller tasks.
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$25,000+$50 - $99 / hr10 - 49
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See all 7 projectsMinimal Studio is a design and development agency specializing in UI/UX and web platform solutions, particularly for Web3 and SaaS products. Across reviews, 100% of clients commend their responsive project management and high-quality deliverables. Their creativity, understanding of complex requirements, and ability to align with clients' visions are consistently highlighted, though some mention room for improvement in documentation and communication.
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$25,000+$100 - $149 / hr10 - 49Calgary, Canada
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See all 8 projectsVertical Motion is a multifaceted technology consultancy and software development firm, offering services such as CRM development, app design, technical audits, and brand strategy. The company has received overwhelmingly positive feedback, with over 90% of reviews praising its responsiveness, expertise, and collaborative approach. Clients consistently highlight the team's professionalism and ability to deliver timely solutions, with one noting a 20% increase in development speed and another achieving recurring revenue from a scalable MVP.
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$10,000+Undisclosed50 - 249São Paulo, Brazil
Services provided
See all 2 projectsVenturiX Solutions is a technology and development company specializing in scalable app and platform development using technologies like C#, Figma, Xamarin, and ReactJS. Reviews praise their thoughtful approach and commitment to delivering quality products efficiently. Approximately 100% of reviewers highlight their effective project management and problem-solving capabilities, while no significant areas for improvement were mentioned.
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$1,000+< $25 / hr10 - 49Ahmedabad, India
Services provided
See all 7 projectsBuoyancy Software LLP is a versatile software development company specializing in mobile app and web application development, with strengths in CRM systems and AI integrations. The company consistently receives high praise for its project management and technical skills, with 100% of reviewers noting timely delivery and exceptional value for cost. Their expertise in developing tailored solutions and a high level of client satisfaction are frequently highlighted in feedback.
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UndisclosedUndisclosed10 - 49Wrocław, Poland
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See all 4 projectsInnovation Software is a versatile software development company offering advanced web application solutions and e-commerce platform enhancements. The company has received overwhelmingly positive feedback, with 100% of reviewers highlighting their professionalism, timely delivery, and effective communication. Clients appreciate their ability to seamlessly integrate into existing systems and their use of modern technologies to achieve significant business improvements.
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$25,000+$50 - $99 / hr50 - 249
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See all 1 projectsEversis is a project management firm specializing in IT infrastructure projects. Overall, feedback is overwhelmingly positive, with 100% of reviewers highlighting effective communication and successful project outcomes. The company is noted for managing complex and satisfying projects, evidenced by securing new work proposals from esteemed clients like the European Space Agency.
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$25,000+$100 - $149 / hr10 - 49Toronto, Canada
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See all 15 projectsQuantum Mob - Out of Business was a software development company specializing in web and mobile app development, with expertise in technologies such as React, Node.js, and PHP. Across various projects, they were praised for their professionalism, responsiveness, and ability to manage complex projects, with over 90% of reviews highlighting their technical proficiency and project adaptability. However, some feedback indicated inconsistencies in resource availability and developer expertise.
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$5,000+< $25 / hr50 - 249Kochi, India
Services provided
See all 44 projectsZartek Technologies is an enterprise application modernization firm that excels in transforming legacy systems and modernizing digital platforms. A noteworthy 100% of reviews highlight their professionalism and effective project management, indicating a strong commitment to client success. Clients appreciate their alignment with company values and the high value for cost offered by their services.
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$50,000+$50 - $99 / hr50 - 249Budapest, Hungary
Services provided
See all 5 projectsDanubius IT Solutions offers services including disaster recovery, managed Kubernetes setup, CI/CD deployment, API exposure, and the development of internal and external tools. Overall feedback highlights their flexibility, strong teamwork, and ability to meet deadlines, making them a reliable partner for App Modernization and IT Modernization projects.
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$10,000+$25 - $49 / hr1,000 - 9,999Princeton, NJ
Services provided
See all 11 projectsCygnet.One is a comprehensive IT solutions provider, specializing in software development, app development, system integration, and more. Their reviews reflect an overall positive client sentiment, with approximately 90% of comments highlighting their technical expertise and project management efficiency. Clients frequently commend Cygnet.One for their skilled developers and effective communication, although occasional improvements in team member experience and time zone communication are suggested.
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$10,000+$25 - $49 / hr50 - 249Mumbai, India
Services provided
See all 8 projectsMyrah Consulting Services Private Limited specializes in developing customized ERP and CRM solutions tailored to diverse industry needs, including automation, inventory management, and customer engagement. The company consistently receives positive feedback, with a notable 48% improvement in job scheduling for clients and 30% increases in inventory accuracy and lead conversion. Reviewers frequently commend their industry-specific understanding and responsive project management.
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$25,000+Undisclosed250 - 999Randburg, South Africa
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See all 2 projectsScrums.com is a staff augmentation company specializing in digital transformation and custom software development. Reviews highlight their exceptional understanding of business challenges, effective project management, and ability to tailor solutions to client needs. All feedback is positive, emphasizing transparency, responsiveness, and significant improvements in efficiency and system modernization.
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$25,000+$25 - $49 / hr50 - 249Warszawa, Poland
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See all 11 projectsClurgo is a software development company that specializes in Java-based solutions, often working with financial institutions and various industries requiring custom system development. The reviews reflect a consistently positive sentiment, with clients praising their technical expertise, responsiveness, and ability to integrate seamlessly with in-house teams. While 90% of clients commend their technical skills and reliability, some suggest improvements in long-term developer retention and deeper business domain involvement.
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$25,000+$25 - $49 / hr10 - 49Twinsburg, OH
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See all 4 projectsFiduciaSoft, LLC is a software development company specializing in custom solutions, including mobile applications, e-commerce platforms, and ERP system integrations. The reviews indicate high satisfaction with their technical expertise and project management capabilities, with over 90% of feedback highlighting their commitment to quality and successful project outcomes. However, some reviews suggest potential improvements in administrative processes due to their smaller company size.
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$100,000+Undisclosed10 - 49
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See all 10 projectsBiTE Interactive is a software development company specializing in mobile app development and consulting, with a strong emphasis on agile methodologies and high-quality software solutions. Reviews indicate a 100% positive feedback rate, highlighting their expertise in mobile application platforms and rigorous software engineering capabilities. Approximately 80% of reviewers commend their project management and communication skills, while 70% emphasize their ability to integrate seamlessly with internal teams, offering valuable strategic insights and delivering projects within tight deadlines.
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$25,000+$50 - $99 / hr10 - 49Vynnyky, Ukraine
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See all 5 projectsRemSoft.Dev is a custom software development company noted for its expertise in technologies such as .NET, Angular, and SQL, with a focus on delivering tailored solutions across sectors including healthcare. Reviews highlight the company’s reliability and professionalism, with 100% of clients expressing satisfaction with their communication and project management. Additionally, clients appreciate RemSoft.Dev's commitment to meeting project requirements and delivering quality applications efficiently.
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$10,000+Undisclosed50 - 249Chicago, IL
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See all 5 projectsalligatortek is a software development company that specializes in creating custom software solutions, from web and mobile platforms to productivity-enhancing plugins. Their services are highly regarded, with 100% of reviewers highlighting their expertise in project management and responsiveness. Clients frequently praise their customer service and ability to deliver projects on time and within budget, emphasizing their role as long-term partners in innovation.
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$10,000+$50 - $99 / hr10 - 49Banja Luka, Bosnia and Herzegovina
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See all 2 projectsdevelabs is an esteemed software development company specializing in building complex applications and services, particularly in the finance and enterprise performance sectors. Reviews highlight their effective project management and technical expertise, with 100% of feedback noting on-time delivery and high user satisfaction. However, 50% of reviewers suggest improved communication during development cycles. Overall, clients commend develabs for their professionalism and ability to exceed expectations.
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$5,000+$25 - $49 / hr10 - 49Kristiansand, Norway
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See all 2 projectsFrontbyte AS is a software development company specializing in both frontend and backend solutions, as well as project management services. Across the reviews, clients consistently praise their skilled team and effective collaboration, with 100% of reviewers highlighting their impressive expertise and resource flexibility. Overall, clients express satisfaction with their ability to deliver cutting-edge solutions and scale development capacity efficiently.
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List of the Top 15 Legacy Modernization Services
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$50,000+$50 - $99 / hr250 - 999Miami, FL
Ability to deliver
38.5/40.019.4/20 Reviews10/10 Clients & Experience9.1/10 Market PresenceService focus
25% Enterprise App Modernization75% Other -
$5,000+< $25 / hr1,000 - 9,999
Ability to deliver
35.9/40.016.6/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$50,000+$50 - $99 / hr250 - 999Wrocław, Poland
Ability to deliver
35.4/40.015.8/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
40% Enterprise App Modernization60% Other -
$50,000+$50 - $99 / hr50 - 249Miami, FL
Ability to deliver
35/40.017/20 Reviews10/10 Clients & Experience8/10 Market PresenceService focus
50% Enterprise App Modernization50% Other -
$5,000+$50 - $99 / hr10 - 49Brno, Czech Republic
Ability to deliver
34.2/40.018.6/20 Reviews9.8/10 Clients & Experience5.7/10 Market PresenceService focus
60% Enterprise App Modernization40% Other -
$25,000+$25 - $49 / hr1,000 - 9,999Orlando, FL
Ability to deliver
40/40.020/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$100,000+$50 - $99 / hr1,000 - 9,999Oakland, CA
Ability to deliver
34/40.015.2/20 Reviews8.8/10 Clients & Experience10/10 Market PresenceService focus
45% Enterprise App Modernization55% Other -
$50,000+$50 - $99 / hr1,000 - 9,999New York, NY
Ability to deliver
39.8/40.020/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$50,000+$50 - $99 / hr1,000 - 9,999Kraków, Poland
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$50,000+$50 - $99 / hr1,000 - 9,999Atlanta, GA
Ability to deliver
37.3/40.017.6/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$10,000+$50 - $99 / hr50 - 249Warszawa, Poland
Ability to deliver
39.1/40.019.6/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$50,000+$50 - $99 / hr50 - 249Gliwice, Poland
Ability to deliver
38.9/40.019/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$10,000+$100 - $149 / hr250 - 999London, England
Ability to deliver
36.8/40.017.6/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$50,000+$50 - $99 / hr250 - 999London, England
Ability to deliver
36.8/40.016.8/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$10,000+< $25 / hr250 - 999Ahmedabad, India
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$100,000+$150 - $199 / hr50 - 249Southborough, MA
Ability to deliver
32.2/40.015.8/20 Reviews10/10 Clients & Experience6.4/10 Market PresenceService focus
50% Enterprise App Modernization50% Other -
$50,000+$50 - $99 / hr250 - 999Hudson, OH
Ability to deliver
36/40.016.6/20 Reviews9.8/10 Clients & Experience9.6/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$50,000+$150 - $199 / hr50 - 249Conshohocken, PA
Ability to deliver
36/40.016.2/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$50,000+$50 - $99 / hr50 - 249San Francisco, CA
Ability to deliver
39.8/40.020/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$50,000+$100 - $149 / hr10 - 49Costa Mesa, CA
Ability to deliver
36.8/40.018/20 Reviews10/10 Clients & Experience8.8/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$25,000+$25 - $49 / hr250 - 999Lakeville, MN
Ability to deliver
37/40.017.2/20 Reviews9.9/10 Clients & Experience9.9/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$50,000+$150 - $199 / hr50 - 249Montréal, Canada
Ability to deliver
37.5/40.017.8/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$10,000+$50 - $99 / hr50 - 249Warszawa, Poland
Ability to deliver
35.3/40.016.8/20 Reviews10/10 Clients & Experience8.6/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$25,000+$25 - $49 / hr50 - 249L'viv, Ukraine
Ability to deliver
38.3/40.019.4/20 Reviews10/10 Clients & Experience8.9/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$10,000+$25 - $49 / hr50 - 249Warszawa, Poland
Ability to deliver
38.3/40.019.2/20 Reviews10/10 Clients & Experience9.1/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
UndisclosedUndisclosed1,000 - 9,999Atlanta, GA
Ability to deliver
33.3/40.016/20 Reviews10/10 Clients & Experience7.3/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$25,000+$50 - $99 / hr50 - 249Prague, Czech Republic
Ability to deliver
39.2/40.020/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$10,000+$25 - $49 / hr50 - 249Portland, OR
Ability to deliver
35.1/40.016.8/20 Reviews10/10 Clients & Experience8.3/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$25,000+$25 - $49 / hr250 - 999Frisco, TX
Ability to deliver
36.5/40.016.6/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$50,000+$100 - $149 / hr50 - 249Belfast, Northern Ireland
Ability to deliver
37/40.017.2/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
20% Enterprise App Modernization80% Other
Top App Modernization Agencies
App modernization companies upgrade, refactor, or re-platform legacy software so it performs like a modern, cloud-ready application. They begin by auditing the existing codebase, infrastructure, and business requirements, then create a roadmap that might include re-architecting monolithic apps into microservices, containerizing workloads, or migrating databases to scalable cloud environments. Their end goal is to improve performance, security, and maintainability while minimizing downtime.
Most firms deliver a mix of strategic and technical services, such as:
- Legacy code assessment and technical debt analysis
- Re-platforming (e.g., on-prem to AWS, Azure, or GCP)
- Code refactoring and re-architecting into microservices
- API enablement and containerization (Docker, Kubernetes)
- UI/UX refresh and mobile optimization
- Data migration, cleansing, and database modernization
- Ongoing maintenance, DevOps, and cloud cost optimization
Pricing varies widely depending on project scope, complexity, and the tech stack involved. Clutch data shows most engagements range from $50,000 to $500,000 overall, with hourly rates between $75 and $200. Lighter projects like a UI facelift or limited refactoring tend to fall near the lower end, while full re-architectures involving cloud migration, data overhaul, and strict compliance can exceed $1 million. Always request a detailed proposal that outlines costs for discovery, development, testing, and support.
When choosing the best right app modernization for your business, consider these:
- Review expertise: Look for case studies that mirror your tech stack (Java, .NET, PHP) and industry compliance needs.
- Check client feedback: Verified Clutch reviews reveal how the team communicates, hits deadlines, and handles setbacks.
- Evaluate methodology: A strong partner will propose a phased approach that includes assessment, pilot, and rollout stages, each with clear success metrics.
- Validate certifications: Cloud partnerships (AWS, Microsoft, Google) signal deep platform knowledge.
- Assess cultural fit: Long projects require easy communication, mutual trust, and shared time zones or overlap.
These are some of the red flags that you should watch for when hiring an app modernization company:
- Guaranteed timelines before an audit: Accurate estimates require a code and infrastructure review.
- Lack of documentation: If they won’t commit to architecture diagrams, test plans, or knowledge transfer, future maintenance may suffer.
- One-size-fits-all solutions: Forcing every project onto a single cloud or framework can indicate limited expertise.
- Poor security practices: Outdated OWASP knowledge or no DevSecOps pipeline is a deal-breaker for critical systems.
- Minimal client references: A reputable firm should readily provide recent, relevant references.
Here are some questions you can ask app modernization companies before hiring them:
- Which modernization strategies (rehost, refactor, re-architect) do you recommend for our stack, and why?
- Can you share success metrics from similar projects—e.g., performance gains or cost reductions?
- What is your approach to minimizing downtime during migration?
- How will you ensure code quality and security (tooling, peer reviews, automated testing)?
- What support and knowledge-transfer do you provide after launch?
- How do you handle scope changes and unforeseen legacy issues?
Partnering with specialists accelerates time-to-value. Experienced teams bring proven frameworks, automation toolchains, and cloud partnerships that help reduce risk and shorten migration windows. Businesses often benefit from faster performance, lower maintenance costs, improved security compliance, and easier feature releases, all without overburdening internal teams.
A freelancer may handle small refactoring tasks cost-effectively but often lacks the resources for large-scale audits, DevOps, and 24/7 support. Agencies provide multidisciplinary teams including architects, developers, QA specialists, DevOps engineers, and project managers who can deliver end-to-end transformations with enterprise-grade SLAs.