Top Application Modernization Services
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UndisclosedUndisclosed50 - 249London, England
Services provided
Codurance Ltd, a custom software development company, was launched in 2013. They offers Custom Software Development and Enterprise App Modernization.
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$5,000+$50 - $99 / hr10 - 49New York, NY
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See all 1 projectsSoftescu is an enterprise technology partner that combines deep technical expertise with unwavering security standards to deliver exceptional digital solutions. Since 2008, we've been helping
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$50,000+$200 - $300 / hr10 - 49Carlsbad, CA
Services provided
Launched in 2000, RemedyOne, a small custom software development company, is in Carlsbad, California. Their services include Custom Software Development and Web Development.
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$5,000+$100 - $149 / hr10 - 49Tulsa, OK
Services provided
Seed Technologies is a small website development firm. Founded in 2004, the team offers Web Development and Custom Software Development.
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$5,000+$100 - $149 / hr2 - 9Tillsonburg, Canada
Services provided
Opid Technologies Incorporated is a Tillsonburg, Canada-based software development firm. The team provides Custom Software Development and Enterprise App Modernization.
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$5,000+$50 - $99 / hr2 - 9Varaždin, Croatia
Services provided
OmnifIT d.o.o., a custom software development company, was launched in 2020. The small team offers Custom Software Development and Enterprise App Modernization.
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$5,000+Undisclosed50 - 249Sheffield, England
Services provided
Nimble Approach is a midsize Digital Engineering company located in Sheffield, England and Leeds, England. Their services include Digital Engineering and Custom Software Development.
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$1,000+$50 - $99 / hr2 - 9Frisco, TX
Services provided
Raincurve is an AI company. Founded in 2026, the company is based in Frisco, Texas. Their services include Artificial Intelligence and AI Consulting.
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$10,000+$25 - $49 / hr2 - 9Bengaluru, India
Services provided
TerexSoft LLP is a software development firm founded in 2024. The agency focuses on Custom Software Development and Application Management & Support.
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$5,000+$150 - $199 / hr10 - 49Windermere, FL
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Established in 2017, Persepta is a business intelligence company. Located in Windermere, Florida, the team focuses on BI & big data consulting & SI and cloud consulting & SI.
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$5,000+< $25 / hr1,000 - 9,999
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See all 2 projectsArionERP is a company specializing in ERP consulting and web development services. Reviews indicate a high level of customer satisfaction, with 100% positive feedback praising their cost-effective pricing, responsive communication, and alignment with client values. Notably, 50% of reviewers commend their significant expertise and convenience in project management, and no areas for improvement were identified as major issues.
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$50,000+$50 - $99 / hr250 - 999Wrocław, Poland
Services provided
See all 19 projectsCSHARK is a software development company offering services such as SaaS solutions, fintech applications, and UX/UI design. Reviews indicate a 100% satisfaction rate, with clients praising their professionalism, prompt delivery, and high-quality code. Approximately 33% of reviewers highlight effective communication and project management, while 20% commend their innovative use of technology. However, minor improvements in communication have been noted.
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$25,000+$25 - $49 / hr250 - 999Jaipur, India
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See all 123 projectsThe NineHertz is a versatile IT services company specializing in app development, digital marketing, and automation solutions. They maintain high client satisfaction, with reviews highlighting their effective project management and expertise in advanced technologies. Approximately 90% of reviews commend their commitment to quality and communication, while nearly 80% emphasize their innovative approach, making them a trusted partner for complex business needs.
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$5,000+$50 - $99 / hr10 - 49Brno, Czech Republic
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See all 12 projectsSenvio is an adept software development company specializing in creating bespoke applications and platforms, including SaaS, subscription management systems, and AI-powered solutions. Reviews are overwhelmingly positive, emphasizing Senvio's exceptional communication, flexibility, and adherence to project timelines. Approximately 100% of reviewers commend their professional project management and understanding of complex requirements, highlighting their capability to deliver user-friendly and efficient solutions.
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$100,000+$50 - $99 / hr1,000 - 9,999Oakland, CA
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See all 7 projectsCI&T, a prominent software development company, specializes in providing comprehensive IT solutions, including software engineering, product development, and support across various industries. Across their reviews, 90% of clients praise their proactive approach and strong communication, with 80% highlighting their ability to integrate seamlessly with in-house teams. Some clients noted areas for improvement in managing turnover and resource allocation. Overall, CI&T maintains a reputation for delivering high-quality, timely solutions.
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$50,000+$50 - $99 / hr1,000 - 9,999Atlanta, GA
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See all 31 projectsSparq is a technology solutions provider specializing in leveraging AI and machine learning to extract insights from data for logistics and delivery companies. The reviews for Sparq are overwhelmingly positive, highlighting their efficient project management, timely delivery, and practical use of known platforms and tools, with no negative feedback reported. Clients appreciate their no-nonsense approach and alignment with company values.
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$100,000+$150 - $199 / hr50 - 249Southborough, MA
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See all 24 projectsAndPlus, An Ensono Company, is a platform development and systems integration firm specializing in web and mobile applications. They are highly praised for their professionalism, in-depth knowledge, and long-term project orientation, with approximately 90% of reviews highlighting their strong project management and collaborative approach. While their strengths lie in development and integration, some reviews note a need for improvement in e-commerce technology support and graphic design capabilities.
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$10,000+$50 - $99 / hr250 - 999Hudson, OH
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See all 28 projectsTaazaa Inc. is a custom software development company known for its expertise in developing tailored solutions across various industries, including healthcare and property management. The company consistently receives high praise for its project management, timely delivery, and responsiveness, with over 90% of reviewers highlighting their effective communication and adherence to timelines. Clients commend their professionalism, transparency, and alignment with company values, making Taazaa a recommended partner for complex software development projects.
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$50,000+$100 - $149 / hr10 - 49Costa Mesa, CA
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See all 40 projectsTepia is a versatile app development company that specializes in creating user-friendly mobile applications for various industries, including software, ridesharing, and retail. Across reviews, clients commend Tepia for their structured project management, proactive problem-solving, and seamless communication. Approximately 90% of reviewers mention their professionalism and efficient responsiveness, while no significant areas for improvement are highlighted.
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$25,000+$25 - $49 / hr250 - 999Lakeville, MN
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See all 63 projectsExcellent Webworld is a versatile technology company specializing in mobile and web app development, as well as UI/UX design. Their strong reputation is highlighted by their consistent delivery of high-quality work, timely project management, and adaptability to client needs. Approximately 90% of reviews commend their professionalism, communication, and technical expertise, while 10% suggest enhancements in areas like documentation and quality assurance.
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$50,000+$50 - $99 / hr50 - 249Miami, FL
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See all 45 projectsDevox Software is a company specializing in Enterprise Application Modernization, focusing on modernizing legacy systems and improving scalability. Their reviews are overwhelmingly positive, with 100% praising their ability to enhance system performance and reliability. Clients highlight their technical expertise and effective project management, resulting in faster systems and better business insights.
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UndisclosedUndisclosed1,000 - 9,999Atlanta, GA
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See all 17 projectsKMS Technology is a software development and IT services company that specializes in providing custom software solutions, testing, and technical assessments. The reviews indicate a high satisfaction rate, with around 85% of clients noting the quality of deliverables and project management, while 90% highlighted their responsiveness and expertise in complex environments. Notably, the company excels in communication and timely delivery, consistently adapting to client needs.
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$10,000+$50 - $99 / hr50 - 249Warszawa, Poland
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See all 3 projectsEyzee is a dynamic IT company specializing in Enterprise Application Modernization and software modernization services. The reviews reflect a 100% positive sentiment, highlighting their exceptional client communication, punctuality, and flexibility in addressing customer needs, with all projects delivered efficiently and ahead of deadlines.
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$10,000+$25 - $49 / hr50 - 249Portland, OR
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See all 26 projectsDarwoft is a versatile software development company specializing in web and mobile app development, with expertise in AI, computer vision, and cloud-based solutions. Across various reviews, clients consistently praise their professionalism, flexibility, and strong project management skills. Approximately 100% of reviewers express satisfaction with their deliverables, citing their ability to meet deadlines and adapt to changes as standout qualities. Darwoft is often commended for clear communication and aligning well with client needs and values.
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$50,000+$50 - $99 / hr250 - 999Unterschleißheim, Germany
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See all 24 projectsGP Solutions is a software development company specializing in travel technology solutions, including ERP systems, custom booking platforms, and integrations. Their reviews highlight a strong emphasis on customizable services, technical expertise, and excellent project management skills. Approximately 90% of feedback is positive, with clients praising their responsiveness, communication, and commitment to delivering projects on time and within budget.
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$25,000+$50 - $99 / hr50 - 249Rybnik, Poland
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See all 14 projectsfireup.pro is a versatile software development company providing services in web and mobile application development, backend systems, and cloud computing implementation. Reviews consistently highlight their technical expertise, seamless integration with client teams, and ability to deliver projects on time, with over 90% of clients praising their commitment to understanding client needs and delivering high-quality results. Their project management style and proactive communication are frequently commended by clients.
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$50,000+$50 - $99 / hr250 - 999Palo Alto, CA
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See all 4 projectsTuring is a company specializing in providing software development talent for enterprise app modernization projects. Reviews indicate a 100% positive feedback rate, highlighting their ability to deliver timely, high-quality services with seamless project management and a global pool of skilled developers. Clients appreciate their transparent pricing and dedicated customer support.
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$250,000+$50 - $99 / hr250 - 999Broomfield, CO
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See all 23 projectsGorilla Logic is a versatile software development and engineering talent agency known for providing staff augmentation and custom software development services, with a particular focus on architecture consulting, UI/UX design, and agile project management. Across reviews, 100% of clients highlight their high-quality engineering resources and strong communication, with clients noting their responsiveness, high-caliber talent, and cultural fit. Approximately 90% of reviewers mention their satisfaction with Gorilla Logic's ability to integrate seamlessly and deliver projects on time.
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$25,000+$50 - $99 / hr250 - 999Warszawa, Poland
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See all 28 projectsAltkom Software is a versatile IT services company specializing in software development, security assessments, and infrastructure solutions. Across numerous reviews, clients consistently praise Altkom Software for their technical expertise, effective communication, and timely project delivery. Approximately 90% of reviewers highlight Altkom's professionalism and comprehensive project management approach, making them a reliable partner for a diverse range of IT and software needs.
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$25,000+$25 - $49 / hr1,000 - 9,999São Paulo, Brazil
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See all 5 projectsFCamara is a technology solutions provider specializing in developing custom platforms, IT infrastructure modernization, and AI integration. Reviews highlight their exceptional project management, technical expertise, and client collaboration, with 100% positive feedback praising their communication, delivery on time, and tailored solutions. A significant portion of reviews (75%) emphasizes their ability to enhance operational efficiency and drive innovation.
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List of the Top 15 Legacy Modernization Services
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$25,000+$50 - $99 / hr250 - 999Miami, FL
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
30% Enterprise App Modernization70% 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 - 999Miami, FL
Ability to deliver
38.1/40.019/20 Reviews10/10 Clients & Experience9.1/10 Market PresenceService focus
25% Enterprise App Modernization75% 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 -
$25,000+$25 - $49 / hr250 - 999Jaipur, India
Ability to deliver
38/40.018.2/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
20% Enterprise App Modernization80% 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 -
$5,000+$50 - $99 / hr10 - 49Brno, Czech Republic
Ability to deliver
34/40.018.4/20 Reviews9.8/10 Clients & Experience5.7/10 Market PresenceService focus
60% Enterprise App Modernization40% 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 / hr250 - 999London, England
Ability to deliver
37.2/40.017.2/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$50,000+$50 - $99 / hr1,000 - 9,999Atlanta, GA
Ability to deliver
37.1/40.017.4/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$50,000+$50 - $99 / hr1,000 - 9,999Kraków, Poland
Ability to deliver
38.9/40.019.2/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
10% Enterprise App Modernization90% 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 -
$50,000+$50 - $99 / hr50 - 249Gliwice, Poland
Ability to deliver
38.7/40.018.8/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$50,000+$25 - $49 / hr250 - 999Toronto, Canada
Ability to deliver
36.5/40.016.6/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$10,000+$100 - $149 / hr250 - 999London, England
Ability to deliver
36.4/40.017.2/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
20% Enterprise App Modernization80% 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+$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 -
$10,000+$50 - $99 / hr250 - 999Hudson, OH
Ability to deliver
35.8/40.016.4/20 Reviews9.8/10 Clients & Experience9.6/10 Market PresenceService focus
20% Enterprise App Modernization80% 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 -
$10,000+$50 - $99 / hr50 - 249Houston, TX
Ability to deliver
39.6/40.020/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
10% Enterprise App Modernization90% 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 -
$25,000+$25 - $49 / hr50 - 249L'viv, Ukraine
Ability to deliver
38.5/40.019.4/20 Reviews10/10 Clients & Experience9.1/10 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 -
$50,000+$50 - $99 / hr50 - 249Miami, FL
Ability to deliver
35.4/40.017.4/20 Reviews10/10 Clients & Experience8/10 Market PresenceService focus
30% Enterprise App Modernization70% 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+$50 - $99 / hr50 - 249Warszawa, Poland
Ability to deliver
35.2/40.016.6/20 Reviews10/10 Clients & Experience8.6/10 Market PresenceService focus
30% Enterprise App Modernization70% 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
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.