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

WideVision Technologies
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WideVision Technologies is a renowned web application development company based in India, specializing in custom web application development, iOS and Android app development, open-source PHP and Joomla development, responsive web and graphic design, as well as online digital marketing services to en
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Los Angeles, California, Us
Services Provided
70% Custom Web Application Development
20% E-Commerce Development
10% Legacy System Modernization
AI Summary
“WideVision Technologies is an Indian web application development firm offering custom software, mobile apps, open-source solutions, responsive design, and digital marketing tailored to diverse business needs.”
Team Connect Ltd.
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Team Connect is a premier nearshore and offshore IT service provider in Poland. We focus on software development using Agile and DevOps methodologies, working with technologies such as JEE, .NET, Python, Angular, React, and Node.js, as well as implementing Salesforce and RPA solutions. Team Connect
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Warszawa, Masovian, Pl
Services Provided+2 Services
30% Software Development Services
25% IT Staff Augmentation
15% Managed IT Services
10% QA & Software Testing
AI Summary
“Team Connect Ltd. is a Poland-based IT service provider specializing in Agile software development, DevOps, and technologies like JEE, .NET, Python, Salesforce, and RPA, employing over 2,000 professionals.”
Epsilon Technologies
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Epsilon Technologies is a firm that focuses on software engineering and AI solutions, emphasizing customized technology that facilitates measurable business transformation. We collaborate with organizations to create, develop, and implement intelligent software solutions designed to address their sp
Highlights
$1,000+
Min Project Size
2-9
Employees
San Pedro Garza Garcia, Nuevo Leon, Mx
Services Provided+1 Services
35% Custom Web Application Development
15% Legacy System Modernization
20% AI Strategy & Roadmap Consulting
13% Custom AI Chatbot Development
AI Summary
“Epsilon Technologies specializes in tailored software engineering and AI solutions, collaborating with organizations to drive digital transformation, enhance operations, and deliver measurable business value.”
Energma
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Energma offers more than just product delivery. As a strategic partner, we combine human knowledge and artificial intelligence to achieve tangible business results. Our worldwide team consists of experienced engineers, industry specialists, and advanced developer agents, all focused on reducing deli
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Smederevo, Rs
Services Provided+3 Services
15% Legacy System Modernization
10% Custom Web Application Development
13% IT Staff Augmentation
7% AI Strategy & Roadmap Consulting
AI Summary
“Energma leverages AI and expert engineers to enhance software delivery, quality, and maintainability across Fintech, Media, Logistics, E-commerce, and SaaS industries worldwide.”
Teren Soft
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Teren Soft is a small company aiming for growth. We are engaged in projects based on Java.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Lviv, Ua
Services Provided
45% Custom Web Application Development
40% Mobile App Development (iOS & Android)
15% Legacy System Modernization
AI Summary
“Teren Soft is a small, growth-oriented company specializing in Java-based projects, delivering professional software solutions with a focus on quality and innovation.”
CloudMe Software Solution
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We focus on implementing POS, inventory, and ERP systems tailored for the retail and wholesale sectors, including restaurants, supermarkets, department stores, footwear shops, auto parts dealers, electrical showrooms, stationery stores, gift shops, coffee shops, and service industries such as gyms,
Highlights
10-49
Employees
Dubai, Dubayy, Ae
Services Provided+1 Services
10% CRM Consulting and SI
38% ERP Consulting and SI
2% Other IT Consulting and SI
35% Custom Web Application Development
AI Summary
“CloudMe Software Solution specializes in tailored POS, inventory, and ERP systems for diverse retail, wholesale, and service industries, enhancing operational efficiency and management.”
coMakeIT
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coMakeIT, based in Baarn, Netherlands, with additional offices in Australia, the UK, and India, specializes in software product engineering. The company focuses on speeding up product innovation, modernizing outdated applications, and transforming best practices into new software intellectual proper
Highlights
$10,000+
Min Project Size
250-999
Employees
Baarn, Utrecht, Nl
Services Provided
35% Custom Web Application Development
15% Legacy System Modernization
50% IT Staff Augmentation
AI Summary
“coMakeIT is a global software product engineering firm specializing in accelerating innovation and modernizing applications across diverse sectors using a product-oriented approach and enterprise expertise.”
Indian App Developer
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The Indian App Developer is a prominent IT development company specializing in mobile app creation. We offer a variety of services, including Android app development, cross-platform mobile app development in India, iPad app development, iPhone app development, Laravel app development, and more. Sinc
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Jaipur, Rajasthan, In
Services Provided
85% Mobile App Development (iOS & Android)
5% Legacy System Modernization
10% QA & Software Testing
AI Summary
“Indian App Developer is an established IT firm offering specialized mobile and enterprise app development, modernization, and testing services, delivering cost-effective, timely solutions globally since 2008.”
DevSecOps Services- Mastek
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Conventional software development frequently encounters a gap between development and operations, resulting in inefficiencies, lengthy release cycles, and difficulties in adjusting to shifting business needs. Furthermore, manual procedures, isolated teams, and inconsistent environments cause delays,
Highlights
$100,000+
Min Project Size
1000-9999
Employees
Addison, Texas, Us
Services Provided+19 Services
3% AI Strategy & Roadmap Consulting
3% Machine Learning Model Development
2% Custom AI Chatbot Development
3% Other IT Consulting and SI
AI Summary
“DevSecOps Services- Mastek offers integrated solutions spanning AI automation, IT infrastructure, software development, digital marketing, and business consulting to optimize software delivery and digital transformation.”
Dexoc - Custom Software Development
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Dexoc is a prominent custom software development and mobile application development agency with locations in India, the USA, and Canada. The company provides a wide array of software application development services aimed at reaching your target audience and protecting your valuable information whil
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+1 Services
8% Legacy System Modernization
20% Custom Web Application Development
5% E-Commerce Development
17% Mobile App Development (iOS & Android)
AI Summary
“Dexoc is a global custom software and mobile app development firm offering diverse IT services, including development, migration, maintenance, and consulting across multiple technologies with 12+ years' experience.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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