Top Application Modernization Services
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$10,000+$50 - $99 / hr2 - 9Bergamo, Italy
Services provided
Cognitronica SRL is an AI Agents company. They are based in Bergamo, Italy, and their services include AI Agents and Custom Software Development.
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$1,000+$25 - $49 / hr2 - 9General Pacheco, Argentina
Services provided
Tu App Arg is a web design agency. In General Pacheco, Argentina, the company offers Web Design and Custom Software Development.
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$1,000+< $25 / hr2 - 9
Services provided
Outofplace is a web development company. Located in Warszawa, Poland, the team focuses on Web Development and Web Design.
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$5,000+$150 - $199 / hr10 - 49Colorado Springs, CO
Services provided
In Colorado Springs, Colorado, 30dps aka HubSpot Gurus is a web development company. Established in 1989, the team specializes in Web Development and Enterprise App Modernization.
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$10,000+$50 - $99 / hr10 - 49Madrid, Spain
Services provided
WAAVI STUDIO S.L. Is a Madrid, Spain-based application development firm. They offer Mobile App Development and Web Development and were launched in 2013.
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$50,000+Undisclosed10 - 49Horsforth, England
Services provided
Proximity Group is an Application Management & Support company. They were launched in 2007 and provide Application Management & Support and ERP consulting and SI.
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$25,000+$100 - $149 / hr10 - 49Columbia, SC
Services provided
Software development company Krumware was founded in 2016. The team focuses on Custom Software Development and Enterprise App Modernization and is located in Columbia, South Carolina.
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$1,000+$25 - $49 / hr10 - 49Oxford, MS
Services provided
Artificial intelligence firm Ataraxy Developers was founded in 2023. The team specializes in Artificial Intelligence and Custom Software Development and is based in Oxford, Mississippi.
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$1,000+$50 - $99 / hr10 - 49Liverpool, England
Services provided
Village Software Engineering is a web development company launched in 1986. The small team specializes in Web Development and Custom Software Development.
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$10,000+Undisclosed50 - 249Austin, TX
Services provided
Phunware, Inc. Is a custom software development firm. Founded in 2009, the company is in Austin, Texas and. Their team specializes in Custom Software Development and Mobile App Development.
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$10,000+$100 - $149 / hr50 - 249Warszawa, Poland
Services provided
Asseco DUS, a mobile app development firm, offer Mobile App Development and Custom Software Development. They were founded in 2016.
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$1,000+Undisclosed10 - 49
Services provided
Established in 2019, Pungo is a web design agency. The team focuses on Web Design and HR Consulting.
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$10,000+< $25 / hr50 - 249
Services provided
Smartlogiq Limited is a midsize London, England-based artificial intelligence development company. The team provides Artificial Intelligence and IT staff augmentation.
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$5,000+$25 - $49 / hrFreelancer
Services provided
Bhambri Industries is an user experience company. The small Ludhiana, India-based team provides UX/UI Design and Web Development. The agency was launched in 2025.
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$1,000+$25 - $49 / hr50 - 249
Services provided
Software development firm Lukor Technologies was founded in 1999. The team provides Custom Software Development and Mobile App Development.
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$5,000+$25 - $49 / hr2 - 9Prishtinë, Kosovo
Services provided
Sync-Code is a software development company. Located in Prishtinë, Kosovo, the firm offers Custom Software Development and Web Development.
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Undisclosed$50 - $99 / hr2 - 9
Services provided
Azur Mobile is a Nice, France-based mobile application development company. They offer Mobile App Development and Custom Software Development and were established in 2012.
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$25,000+$25 - $49 / hr2 - 9Helsinki, Finland
Services provided
Softros Systems Inc. OY is a small Helsinki, Finland-based custom software development firm. The team provides Custom Software Development and Enterprise App Modernization.
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Undisclosed$25 - $49 / hr2 - 9Bhubaneswar, India
Services provided
KORSENEX is a software development company founded in 2026. The team provides Custom Software Development and IoT development and is in Bhubaneswar, India.
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$10,000+$25 - $49 / hr2 - 9Gdynia, Poland
Services provided
Web24.com.pl Sp. Z o.o. Is a web development firm launched in 2008. Their services include Web Development and Web Design.
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UndisclosedUndisclosed250 - 999
Services provided
Analance, a big data company, is in Miami, Florida. Established in 2022, the team focuses on BI & big data consulting & SI and IT strategy consulting.
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$10,000+$50 - $99 / hr250 - 999Columbus, OH
Services provided
Founded in 2012, Devfi, Inc is a midsize data analytics company. Their services include BI & big data consulting & SI and IT staff augmentation.
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$75,000+< $25 / hr250 - 999Pune, India
Services provided
CentraLogic is an e-commerce development firm. They are in Pune, India. Their team focuses on E-Commerce Development and Web Development.
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$10,000+$100 - $149 / hr2 - 9
Services provided
Launched in 2008, Neuserv is a software development firm. The team offers Custom Software Development and Enterprise App Modernization.
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$25,000+$100 - $149 / hr50 - 249Kowloon, Hong Kong
Services provided
Mobile application development company Oursky is based in Kowloon, Hong Kong and Taipei, Taiwan. Launched in 2008, the team focuses on Mobile App Development and Artificial Intelligence.
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UndisclosedUndisclosed50 - 249Tallinn, Estonia
Services provided
TeamDev Ltd. Is a custom software development firm. Located in Tallinn, Estonia and Kharkiv, Ukraine, their team offers Custom Software Development and Artificial Intelligence.
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$1,000+< $25 / hr10 - 49Berlin, Germany
Services provided
Established in 2017, webartPros, a small web development firm, is in Berlin, Germany and Karachi, Pakistan. Their team offers Web Development and Custom Software Development.
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$25,000+$25 - $49 / hr10 - 49
Services provided
Onelogica is a cloud consulting & SI company. They were launched in 2023 and focus on cloud consulting & SI and CRM consulting and SI.
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UndisclosedUndisclosed50 - 249P N Palayam, India
Services provided
V&D Labs is a mobile app development company. The team is located in P N Palayam, India and Bengaluru, India, and their services include Mobile App Development and Custom Software Development.
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$1,000+$25 - $49 / hr50 - 249Sviatopetrivske, Ukraine
Services provided
Established in 2015, S2K Software is a software development firm. The team specializes in Custom Software Development and Web Development.
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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
35.8/40.020/20 Reviews10/10 Clients & Experience5.8/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$50,000+$50 - $99 / hr1,000 - 9,999New York, NY
Ability to deliver
37.8/40.020/20 Reviews10/10 Clients & Experience7.8/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$100,000+$50 - $99 / hr250 - 999Miami, FL
Ability to deliver
34.7/40.019/20 Reviews10/10 Clients & Experience5.7/10 Market PresenceService focus
25% Enterprise App Modernization75% Other -
$10,000+$25 - $49 / hr1,000 - 9,999Southborough, MA
Ability to deliver
32.1/40.016.6/20 Reviews10/10 Clients & Experience5.5/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
UndisclosedUndisclosed1,000 - 9,999Atlanta, GA
Ability to deliver
34/40.018.8/20 Reviews10/10 Clients & Experience5.2/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$50,000+$50 - $99 / hr250 - 999Wrocław, Poland
Ability to deliver
31.6/40.015.8/20 Reviews10/10 Clients & Experience5.8/10 Market PresenceService focus
40% Enterprise App Modernization60% Other -
$5,000+$50 - $99 / hr10 - 49Brno, Czech Republic
Ability to deliver
31.3/40.017.8/20 Reviews9.8/10 Clients & Experience3.7/10 Market PresenceService focus
60% Enterprise App Modernization40% Other -
$10,000+$50 - $99 / hr250 - 999Sacramento, CA
Ability to deliver
30.8/40.016.4/20 Reviews10/10 Clients & Experience4.5/10 Market PresenceService focus
80% Enterprise App Modernization20% Other -
$5,000+< $25 / hr1,000 - 9,999
Ability to deliver
30.7/40.016.2/20 Reviews10/10 Clients & Experience4.5/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$100,000+$50 - $99 / hr1,000 - 9,999Oakland, CA
Ability to deliver
30.5/40.015.2/20 Reviews8.8/10 Clients & Experience6.6/10 Market PresenceService focus
45% Enterprise App Modernization55% Other -
$25,000+$25 - $49 / hr50 - 249Agoura Hills, CA
Ability to deliver
36.4/40.020/20 Reviews10/10 Clients & Experience6.4/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$10,000+$50 - $99 / hr50 - 249București, Romania
Ability to deliver
33.3/40.019.6/20 Reviews10/10 Clients & Experience3.7/10 Market PresenceService focus
35% Enterprise App Modernization65% Other -
$100,000+$150 - $199 / hr50 - 249Southborough, MA
Ability to deliver
30.1/40.015.8/20 Reviews10/10 Clients & Experience4.3/10 Market PresenceService focus
50% Enterprise App Modernization50% Other -
$10,000+$25 - $49 / hr250 - 999Beijing, China
Ability to deliver
35.4/40.019.6/20 Reviews9.1/10 Clients & Experience6.7/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$25,000+$25 - $49 / hr1,000 - 9,999Orlando, FL
Ability to deliver
35.6/40.020/20 Reviews10/10 Clients & Experience5.6/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$10,000+$50 - $99 / hr250 - 999Hudson, OH
Ability to deliver
33.5/40.017.2/20 Reviews9.8/10 Clients & Experience6.5/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$10,000+$150 - $199 / hr10 - 49Littleton, CO
Ability to deliver
31.8/40.017.6/20 Reviews10/10 Clients & Experience4.2/10 Market PresenceService focus
45% Enterprise App Modernization55% Other -
$1,000+< $25 / hr250 - 999Hanoi, Vietnam
Ability to deliver
34.8/40.017/20 Reviews9.7/10 Clients & Experience8/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$25,000+$150 - $199 / hr50 - 249Claymont, DE
Ability to deliver
33.3/40.016.6/20 Reviews10/10 Clients & Experience6.7/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$25,000+$25 - $49 / hr50 - 249L'viv, Ukraine
Ability to deliver
37.2/40.020/20 Reviews10/10 Clients & Experience7.2/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$50,000+$50 - $99 / hr1,000 - 9,999Kraków, Poland
Ability to deliver
35.2/40.019/20 Reviews10/10 Clients & Experience6.2/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$50,000+$50 - $99 / hr1,000 - 9,999Atlanta, GA
Ability to deliver
32.3/40.016.8/20 Reviews10/10 Clients & Experience5.5/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$50,000+$50 - $99 / hr50 - 249Gliwice, Poland
Ability to deliver
34/40.017.8/20 Reviews10/10 Clients & Experience6.2/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$5,000+$50 - $99 / hr250 - 999London, England
Ability to deliver
31.6/40.016.6/20 Reviews10/10 Clients & Experience5/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$50,000+$100 - $149 / hr10 - 49Costa Mesa, CA
Ability to deliver
32.6/40.018.6/20 Reviews10/10 Clients & Experience4/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$50,000+$50 - $99 / hr50 - 249Miami, FL
Ability to deliver
31.5/40.017.2/20 Reviews10/10 Clients & Experience4.3/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$25,000+$25 - $49 / hr1,000 - 9,999São Paulo, Brazil
Ability to deliver
33.4/40.016.6/20 Reviews9.9/10 Clients & Experience7/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$10,000+$50 - $99 / hr50 - 249Warszawa, Poland
Ability to deliver
31.4/40.016.4/20 Reviews10/10 Clients & Experience5/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$50,000+$100 - $149 / hr250 - 999London, England
Ability to deliver
28.2/40.016.2/20 Reviews7.8/10 Clients & Experience4.2/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$25,000+$25 - $49 / hr250 - 999Kropyvnytskyi, Ukraine
Ability to deliver
34.2/40.018.8/20 Reviews10/10 Clients & Experience5.4/10 Market PresenceService focus
10% Enterprise App Modernization90% 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.