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

Grey8 Technologies Private Limited
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I am the Founder and Principal Consultant at Grey8, a company that specializes in AI systems engineering and product development. With over two decades of experience in distributed systems, cloud platforms, and large-scale product engineering, I assist both startups and established companies in tran
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Hyderabad, Telangana, In
Services Provided+2 Services
13% AI Strategy & Roadmap Consulting
13% Custom AI Chatbot Development
17% Machine Learning Model Development
7% Conversational AI & Voice Assistant Development
AI Summary
“Grey8 Technologies Private Limited specializes in AI systems engineering and product development, enabling startups and enterprises to build scalable, reliable, and secure AI-driven platforms and cloud-native solutions.”
Pragmatic Coders
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Pragmatic Coders, located in Kraków, serves as a product collaborator for companies in sectors such as FinTech, HealthTech, legacy systems, and AI automation, assisting them in creating scalable digital products. Since our inception in 2014, we have produced over 150 products with a team of more tha
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Krakow, Lesser Poland, Pl
Services Provided+4 Services
12% Custom Web Application Development
5% Mobile App Development (iOS & Android)
12% Legacy System Modernization
5% E-Commerce Development
AI Summary
“Pragmatic Coders, based in Kraków, delivers scalable digital products in FinTech, HealthTech, and AI, combining development, product management, and UX for rapid, business-focused solutions.”
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C-Scale Software
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C-Scale Software is a nearshore outsourcing firm located in the university town of Craiova, Romania. It was established by a small group of specialists in embedded systems and networking, who have been providing embedded applications to various industries and businesses globally for over a decade. O
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Craiova, Dolj, Ro
Services Provided+2 Services
20% Custom Web Application Development
10% Mobile App Development (iOS & Android)
10% E-Commerce Development
25% Backend Development
AI Summary
“C-Scale Software, based in Craiova, Romania, specializes in embedded systems and network solutions, offering end-to-end software development and maintenance services globally for over a decade.”
Epixel Solutions
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Epixel Solutions transforms your business with advanced digital technology based on a cutting-edge AI-driven platform that enables you to explore new possibilities. Our digital offerings include business process transformation, digital process automation, cloud services, and blockchain, all designed
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Kochi, Kerala, In
Services Provided+1 Services
35% Custom Web Application Development
15% Legacy System Modernization
20% BI & Big Data Consulting & SI
25% Cloud Consulting & SI
AI Summary
“Epixel Solutions delivers comprehensive digital transformation through AI-driven platforms, offering business process automation, cloud services, and blockchain to enhance operational efficiency and innovation.”
E-gineering, Inc.
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With more than 20 years of experience, E-gineering embodies reliability, skill, and quality. As a trusted partner known for providing innovative solutions, we go beyond being just a software company. We serve as your strategic collaborator, blending creativity with expertise to prioritize your busin
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Indianapolis, Indiana, Us
Services Provided
40% Custom Web Application Development
25% API Development & Integration
20% Mobile App Development (iOS & Android)
15% Legacy System Modernization
AI Summary
“E-gineering, Inc. offers over 20 years of expertise delivering innovative software solutions as a reliable strategic partner, combining creativity and skill to meet diverse business goals.”
Exovara Labs LLC
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Exovara Labs LLC is a tech firm dedicated to making web development accessible to everyone. We merge skilled craftsmanship with an innovative platform, enabling individuals—from startups to established enterprises—to create high-quality websites. Our story began with a devoted full-stack developer w
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
San Francisco, California, Us
Services Provided
40% Custom Web Application Development
25% API Development & Integration
20% E-Commerce Development
15% Legacy System Modernization
AI Summary
“Exovara Labs LLC specializes in democratizing web development by providing an innovative platform for creating and hosting customizable, professional websites accessible to startups and enterprises alike.”
SyncSys
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We focus on creating tailor-made software applications. Our company is particularly skilled in custom programming, database design, and developing software applications for both client-server and internet/intranet environments.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Cluj-Napoca, Cluj, Ro
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% E-Commerce Development
15% Legacy System Modernization
AI Summary
“SyncSys specializes in developing custom software solutions, offering expertise in programming, database design, and applications for client-server and web-based environments.”
Blackbird Labs
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Custom software solutions and IT staffing services. We are part of a company group with over 40 years of experience. Our dedicated training center is designed to enhance the skills of more than 400 individuals annually, offering 8 hours of training each day for eight months.
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Jacksonville, Florida, Us
Services Provided
40% Custom Web Application Development
25% API Development & Integration
20% QA & Software Testing
15% Legacy System Modernization
AI Summary
“Blackbird Labs delivers custom software solutions and IT staffing services, backed by over 40 years of experience and a dedicated training center enhancing over 400 professionals annually.”
DePronto Infotech
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DePronto Infotech is a Software Development Company that is dynamic and innovative, committed to providing advanced technology solutions throughout India and the UK. Our expertise is twofold: we provide skilled in-house developers who are proficient in various areas. We operate within two main servi
Highlights
$5,000+
Min Project Size
50-249
Employees
Mumbai City, Maharashtra, In
Services Provided
20% QA & Software Testing
20% API Development & Integration
10% Legacy System Modernization
50% IT Staff Augmentation
AI Summary
“DePronto Infotech is a dynamic software development company delivering advanced technology solutions with skilled developers across India and the UK, specializing in diverse IT services.”
AppIt Ventures
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AppIt Ventures is a recognized, woman-led custom software development company that has won multiple awards. Since we started in 2012, we have created hundreds of high-quality applications and tailored software solutions for a diverse range of clients, including local small and medium enterprises as
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Denver, Colorado, Us
Services Provided
8% Legacy System Modernization
25% Mobile App Development (iOS & Android)
17% Custom Web Application Development
50% IT Staff Augmentation
AI Summary
“AppIt Ventures is a woman-led custom software development firm since 2012, delivering award-winning mobile and web applications for SMEs and Fortune 500 clients through collaborative solutions.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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