Top Legacy System Modernization Firms

Many core systems still run on COBOL, Visual Basic, old .NET or Java monoliths that few engineers can maintain and that cannot connect to modern tools. Legacy system modernization companies replace or rework them without stopping the business: they assess the codebase, choose between rehosting, refactoring, rearchitecting and rebuilding, then migrate data and users in stages. Companies hire them when vendors end support, when the last developer who knows the system is retiring, when security audits flag unsupported software, or when a new product needs APIs the old system cannot offer.

Compare the firms here on modernizations of your specific technology and on how they keep the old and new systems running side by side during the switch.

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4,482 Companies

List of the Best Legacy System Modernization Agencies

Desap Enterprises
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Desap is a comprehensive software and app development firm located in Manchester, UK. We assist our clients in reaching their business goals by providing digital solutions. Our clientele includes both major corporations and emerging startups.
Highlights
$50,000+
Min Project Size
10-49
Employees
Services Provided+7 Services
7% QA & Software Testing
12% Mobile App Development (iOS & Android)
5% Legacy System Modernization
10% Custom Web Application Development
AI Summary
“Desap Enterprises is a Manchester-based software and app development company delivering digital solutions to major corporations and startups to help achieve their business goals.”
Broadteam
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Broadteam offers cutting-edge software for the broadcast sector, enabling clients to enjoy exceptional design and advanced technology through swift and effective solutions. Our commitment to design thinking and refining software drives us. Established in 2015 and located in Sofia and Paris, our prim
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Paris, Ile De France, Fr
Services Provided+9 Services
8% Custom Web Application Development
5% Backend Development
5% Frontend Development
2% Legacy System Modernization
AI Summary
“Broadteam develops innovative, user-friendly software for the broadcast industry, focusing on ergonomic design and technology to deliver efficient, secure, and engaging solutions since 2015.”
Anantam Innovision Private Limited
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At Anantam Innovision, we are dedicated to providing endless opportunities with cutting-edge software solutions. Our skilled team diligently develops software that is user-friendly, dependable, and exceptionally efficient, consistently striving to expand the limits of innovation. We provide services
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+8 Services
10% Custom Web Application Development
8% Mobile App Development (iOS & Android)
5% API Development & Integration
3% E-Commerce Development
AI Summary
“Anantam Innovision develops innovative, reliable software solutions across web, ERP, AI/ML, mobile, desktop, and gaming applications, leveraging advanced technologies to expand digital possibilities.”
Endelevu Labs
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Endelevu Labs is leading the way in sustainable technology, transforming our approach to using innovation for environmental protection. We imagine a worldwide transition where advanced technology establishes new benchmarks in sustainability, encouraging a future in which innovation and environmental
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+7 Services
5% Mobile App Development (iOS & Android)
3% Legacy System Modernization
3% QA & Software Testing
5% API Development & Integration
AI Summary
“Endelevu Labs pioneers sustainable technology innovations, integrating environmental protection with advanced solutions to promote global sustainability benchmarks and eco-conscious innovation.”
Red Web Tigers
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(Red Web Tigers)™ is a skilled group of software developers specializing in web application development with contemporary technology since 2005. Our team has expertise in Ruby on Rails, Phoenix/Elixir, EmberJS, JavaScript, CSS, HTML, MySQL, PostgreSQL, and more. For additional information, please vi
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Bengaluru, Karnataka, In
Services Provided+16 Services
7% Frontend Development
3% Mobile App Development (iOS & Android)
7% E-Commerce Development
13% Backend Development
AI Summary
“Red Web Tigers is a proficient software development team specializing in web applications using modern technologies such as Ruby on Rails, Phoenix/Elixir, and JavaScript since 2005.”
Nearshore Devs
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Nearshore Devs is dedicated to custom software development, specializing in SaaS solutions, mobile applications, and the creation of prototypes and MVPs for businesses. Our expertise encompasses a range of technologies including .NET, Python, PHP, React, Flutter, Azure, and AWS. We pride ourselves o
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+12 Services
5% Custom Web Application Development
4% Mobile App Development (iOS & Android)
3% Backend Development
2% API Development & Integration
AI Summary
“Nearshore Devs specializes in custom software development, offering SaaS, mobile apps, prototypes, plus IT recruitment and staff augmentation with rapid contractor placement.”
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StuTek
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StuTek is an international Software Development as a Service (SDaaS), IT Outsourcing, and Consulting organization based in Canada. We offer sustainable software development solutions, encompassing Web, App, and Game Development, as well as DeFi, CeFi, Blockchain, AI & Machine Learning, ERP, CRM, and
Highlights
10-49
Employees
Toronto, Ontario, Ca
Services Provided+8 Services
10% Custom Web Application Development
6% E-Commerce Development
3% Legacy System Modernization
6% Mobile App Development (iOS & Android)
AI Summary
“StuTek is a global IT services firm delivering custom software development, AI-driven automation, data analytics, cloud infrastructure, and cybersecurity solutions to diverse industries with expert teams.”
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ARRIS AGENCY
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ARRIS is a digital product agency located in Poland that focuses on custom software development, UX/UI design, and automation solutions. We collaborate with startups, scale-ups, and enterprises to create scalable, high-performance web and mobile applications that align with their specific business o
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+5 Services
15% Custom Web Application Development
10% Mobile App Development (iOS & Android)
13% Backend Development
7% Frontend Development
AI Summary
“ARRIS is a Poland-based digital product agency specializing in custom software development, UX/UI design, automation, and scalable web and mobile applications across fintech, automotive, and e-commerce sectors.”
Different Development
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Different Development is your trusted ally for intricate eBusiness-IT projects. With extensive experience in international project management, a strong technological foundation, and the independence and agility of a small yet highly skilled organization, we deliver exceptional results.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+10 Services
5% QA & Software Testing
7% Mobile App Development (iOS & Android)
7% E-Commerce Development
5% Legacy System Modernization
AI Summary
“Different Development specializes in managing complex eBusiness-IT projects, combining extensive international experience and technological expertise within a skilled, agile, and independent team.”
4Blocks Software Labs
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Welcome to 4Blocks, your comprehensive software partner for Web2 and Web3 advancements. Since our inception in 2020, we have successfully completed over 200 projects for both startups and established enterprises, combining extensive technical knowledge with precise execution. We assist you in bringi
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
San Zeno, Trentino South Tyrol, It
Services Provided+8 Services
5% Custom Web Application Development
4% API Development & Integration
4% Mobile App Development (iOS & Android)
4% E-Commerce Development
AI Summary
“4Blocks Software Labs delivers comprehensive software solutions in Web2 and Web3, specializing in scalable platforms, blockchain development, mobile apps, and product consulting for startups and enterprises.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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