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

i-ways sales solutions GmbH
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i-ways is a digital technology partner that assists businesses in creating scalable software systems customized to their requirements. Our expertise includes custom software development, cloud architecture, and platform engineering, with a dedicated emphasis on digital transformation and scalability
Highlights
10-49
Employees
Services Provided+4 Services
7% Legacy System Modernization
14% API Development & Integration
5% E-Commerce Development
8% Custom Web Application Development
AI Summary
“i-ways sales solutions GmbH specializes in scalable, custom software development and cloud architecture, delivering modular, API-driven digital transformation solutions for diverse enterprises.”
Digital Garage
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Our goal is to eliminate the obstacles that small and medium enterprises face in adopting technology as they navigate their digital transformation and embrace data-driven decision-making. At Digital Garage, we are dedicated to addressing our clients' business challenges through technological integra
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+11 Services
18% Custom Web Application Development
8% Legacy System Modernization
25% Other Digital Marketing
6% Robotic Process Automation (RPA)
AI Summary
“Digital Garage empowers small and medium enterprises by integrating advanced technologies like Microsoft’s Power Platform, fostering seamless digital transformation and data-driven growth solutions.”
codexium
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Codexium offers AI-driven engineering pods—experienced nearshore development teams that integrate seamlessly with your organization to rapidly deliver production-ready software. We collaborate with startups, SaaS firms, and enterprises in sectors such as fintech, healthcare, and B2B platforms. Our t
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+5 Services
8% Mobile App Development (iOS & Android)
10% Custom Web Application Development
5% Legacy System Modernization
3% E-Commerce Development
AI Summary
“Codexium provides senior AI-enabled nearshore engineering pods delivering rapid, high-quality software solutions across fintech, healthcare, and B2B, emphasizing ownership, transparency, and seamless integration.”
Enkaytech
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We develop contemporary applications designed to enhance user productivity. We assist users in generating revenue from their data by leveraging data science, machine learning, and artificial intelligence. We also connect their applications with various systems and applications. Additionally, we ensu
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+5 Services
14% Custom Web Application Development
7% ERP & CRM Development
10% API Development & Integration
3% Legacy System Modernization
AI Summary
“Enkaytech develops advanced applications integrating data science, machine learning, and AI to boost productivity and revenue, ensuring scalability via cloud computing and container technologies.”
Areus Development
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Areus focuses on delivering high-quality software, pioneering research and development, cybersecurity, and advancing the fields of artificial intelligence and robotics. We work with senior executives, including CEOs, CIOs, and IT VPs, to bring their technological visions to life, ensuring sustainabl
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Boston, Massachusetts, Us
Services Provided+14 Services
4% QA & Software Testing
3% ERP & CRM Development
5% Frontend Development
7% Backend Development
AI Summary
“Areus specializes in software development, AI, robotics, and cybersecurity, partnering with executives and research institutions to deliver innovative, strategic technology solutions with lasting impact.”
Peterson Digital, LLC
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Peterson Digital, established in 2017, is a digital service provider driven by a passion for creating high-quality websites and tailored software solutions. Having worked with more than 15 small and medium-sized business clients across various sectors, Peterson Digital has experienced significant gr
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Sacramento, California, Us
Services Provided+5 Services
20% Custom Web Application Development
18% Mobile App Development (iOS & Android)
8% E-Commerce Development
5% Legacy System Modernization
AI Summary
“Peterson Digital, founded in 2017, delivers customized websites, software, hosting, SEO, and marketing services, supporting SMBs with expert digital solutions and dedicated client partnership.”
MangoTech Solutions
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We are passionate about IT, technology, and yes, mangoes too! Our team comprises some of Pakistan's leading IT experts, skilled in nearly every aspect of Information Technology. Consistency is our hallmark, setting us apart from many other companies. We understand the significance of perseverance an
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Karachi, Sindh, Pk
Services Provided+11 Services
13% Custom Web Application Development
11% Mobile App Development (iOS & Android)
3% E-Commerce Development
2% ERP & CRM Development
AI Summary
“MangoTech Solutions, founded in 2016, offers expert custom software, mobile, and web app development, serving diverse industries globally with innovative, consistent IT solutions.”
Gigasec Services Limited
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Gigasec Services Limited is a Nigerian-based engineering and technology firm that provides Internet Protocol security services and solutions. These offerings aim to enhance communication with our clients by keeping them informed about ongoing events and identities in their vicinity.
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Port Harcourt, Rivers, Ng
Services Provided+10 Services
8% Custom Web Application Development
4% Mobile App Development (iOS & Android)
6% Cloud Consulting & SI
2% Legacy System Modernization
AI Summary
“Gigasec Services Limited is a Nigerian technology firm delivering cybersecurity, software development, cloud consulting, IT managed services, UI/UX and graphic design, alongside business consulting for diverse industries.”
Vaikunth Technologies
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Vaikunth Technologies is a technology company located in India, specializing in web application development, software development, and e-commerce websites. We are recognized for our high-quality web designs that are innovative, unique, professional, and visually appealing. Our mission is to provide
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Bhavnagar, Gujarat, In
Services Provided+6 Services
12% Custom Web Application Development
12% E-Commerce Development
5% Mobile App Development (iOS & Android)
3% Legacy System Modernization
AI Summary
“Vaikunth Technologies is an Indian IT firm delivering innovative web and mobile applications, e-commerce solutions, blockchain, digital marketing, and strategic consulting to enhance business growth.”
Wudox Software Solutions
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Wudox develops high-performance, scalable, and cloud-compatible software tailored for businesses requiring more than just basic websites or simple applications. We specialize in SaaS platforms, custom web and mobile apps, automation tools, and secure digital systems designed to enhance operations an
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Mississauga, Ontario, Ca
Services Provided+5 Services
15% Custom Web Application Development
5% Mobile App Development (iOS & Android)
18% SaaS Product Development
8% API Development & Integration
AI Summary
“Wudox Software Solutions creates scalable, high-performance SaaS and custom applications with secure, efficient architectures, enabling businesses to modernize operations and achieve sustainable growth.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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