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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We evaluate companies on verified profile data: services, pricing, locations, and portfolio. Client reviews are being collected. We may earn a fee for some placements. How we rank and verify

4,482 Companies

List of the Best Legacy System Modernization Agencies

Teamvoy
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Here’s a revised version of the text, keeping it to about 2000 characters: Teamvoy is an AI engineering and consulting firm established in 2013, collaborating with companies in sectors such as fintech, healthcare, insurance, high-tech, and manufacturing. We focus on integrating AI into existing pro
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Lviv, Lviv, Ua
Services Provided+7 Services
10% Custom Web Application Development
11% Legacy System Modernization
7% Backend Development
5% API Development & Integration
AI Summary
“Teamvoy is an AI engineering and consulting firm specializing in integrating AI, modernizing legacy systems, and providing full-cycle development across fintech, healthcare, manufacturing, and tech sectors.”
tenpixls
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Tenpixls is the premier web development agency for businesses and SaaS entrepreneurs because we excel at delivering results. We assist SaaS founders by offering a dedicated team of senior-level experts who support you from the initial concept through to product expansion. Whether you need a robust M
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Kyiv, Ua
Services Provided
43% Custom Web Application Development
7% Legacy System Modernization
30% Product UX Strategy
20% UX Research & Usability Testing
AI Summary
“Tenpixls is a web development agency specializing in SaaS solutions, offering senior expertise, user-focused design, scalable architecture, and comprehensive project management from concept to launch.”
Stefan Majiros | Custom MVP and Mobile App Development (React Native, AWS Amplify, Firebase)
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A seasoned mobile developer with extensive experience in an international firm, currently operating his own development studio and collaborating with clients worldwide. He specializes in React Native, AWS, and Firebase. While he prefers remote work, he is open to occasional on-site commitments if re
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Munich, Bavaria, De
Services Provided
43% Mobile App Development (iOS & Android)
7% Legacy System Modernization
30% Product UX Strategy
20% UX Research & Usability Testing
AI Summary
“Stefan Majiros operates a global mobile app development studio specializing in React Native, AWS Amplify, and Firebase, delivering custom MVPs with flexible remote and on-site collaboration.”
Old Monk Tech
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Old Monk Tech is a forward-thinking software and IT services firm committed to delivering innovative solutions for businesses of all scales. Founded on a mix of knowledge and creativity, we combine traditional wisdom with the flexibility of contemporary technology.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
30% Mobile App Development (iOS & Android)
40% Custom Web Application Development
20% Legacy System Modernization
10% QA & Software Testing
AI Summary
“Old Monk Tech is a software and IT services company blending traditional wisdom with modern technology to provide innovative solutions for businesses of all sizes.”
CoderPush
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Instead of merely developing features, prioritize creating the right product with an effective strategy. We emphasize transparency by addressing bugs quickly and affordably rather than trying to eliminate them completely. We also value collaboration: our goal is to provide you with a prototype withi
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Ho Chi Minh City, Vn
Services Provided+1 Services
35% Custom Web Application Development
20% Mobile App Development (iOS & Android)
20% Backend Development
15% Frontend Development
AI Summary
“CoderPush prioritizes strategic product development, emphasizing transparency, rapid bug resolution, and collaborative prototyping within two weeks to refine products based on user insights.”
Soft Futura
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Soft Futura is recognized for its skilled team of engineers and committed support network. We prioritize honesty, transparency, and a focus on our clients. Our team of experts delivers strong solutions and innovative ideas. Our goal is to be a reliable partner for our clients in attaining success in
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Jaipur, Rajasthan, In
Services Provided+1 Services
20% Mobile App Development (iOS & Android)
15% E-Commerce Development
35% Custom Web Application Development
10% Legacy System Modernization
AI Summary
“Soft Futura is a client-focused technology company delivering innovative solutions and reliable support through a skilled engineering team committed to honesty, transparency, and success.”
Evenmore
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Evenmore is a service company established on the belief that people are the most crucial element in the IT market. We facilitate a seamless experience between clients and contractors, helping you conserve time, money, and energy. We meticulously pair clients with developers and equip developers with
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Vinnytsia, Vinnytsia, Ua
Services Provided
40% Custom Web Application Development
15% Legacy System Modernization
20% QA & Software Testing
25% Frontend Development
AI Summary
“Evenmore provides expert IT staffing services, connecting clients with skilled developers in technologies like Java, Node.js, Angular, Vue, and React to deliver efficient, high-quality project outcomes.”
Eleviant Tech
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Eleviant Tech, previously known as Impiger Technologies, Inc., is a two-decade-old technology firm specializing in Mobile, Cloud, Web, IoT, AR, RPA, and AI solutions. We serve various industries, including Manufacturing, Logistics, Retail, Healthcare, Finance, and Services. With a team of over 450 p
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
250-999
Employees
Richardson, Texas, Us
Services Provided+4 Services
20% Cloud Consulting & SI
20% Mobile App Development (iOS & Android)
15% Other IT Consulting and SI
10% Software Development Services
AI Summary
“Eleviant Tech delivers comprehensive digital transformation through software development, AI-driven automation, cloud infrastructure, and consulting services, serving diverse industries with innovative technology solutions worldwide.”
SToFU Systems
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System Engineering, Low-Level R&D, Security Audits & Web3 Infrastructure Partner We are a group of system engineers, security experts, and developers dedicated to delivering production-quality software where performance, accuracy, and security are paramount. What we offer: Core competencies:
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+2 Services
3% Custom Web Application Development
14% Backend Development
17% Legacy System Modernization
20% Unified Communications Consulting & SI
AI Summary
“SToFU Systems specializes in advanced system engineering, security audits, blockchain infrastructure, and software development, delivering high-performance, secure, and reliable technical solutions across diverse domains.”
Mirit - Laravel Softwarehouse
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Developers' work is billed on an hourly basis, with clear terms for collaboration. We focus on collaborative problem-solving and the integration of innovative solutions into your project. Partnering with our team will help you understand the essence of collaborative development for your idea and rev
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Pleszew, Pl
Services Provided+2 Services
30% Custom Web Application Development
10% Legacy System Modernization
10% E-Commerce Development
20% Mobile App UI Design
AI Summary
“Mirit - Laravel Softwarehouse offers hourly-billed, collaborative development services integrating innovative solutions to streamline business operations and prepare for client expansion.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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