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

Lumen Services Limited
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At Lumen, we create strong, customized web solutions aimed at making technology beneficial for your business. We handle everything from design and development to hosting and ongoing support, providing comprehensive solutions that adapt to your evolving needs. Our small, experienced team collaborates
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
29% Custom Web Application Development
5% Legacy System Modernization
33% Managed IT Services
33% AI Strategy & Roadmap Consulting
AI Summary
“Lumen Services Limited delivers tailored full-stack web solutions and practical AI integrations, partnering closely with clients to provide adaptive technology, development, hosting, and ongoing support for business growth.”
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Book My Order
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Intelvue is a premier company specializing in Web and Mobile App Development, recognized as one of the leading firms in the US, UK, UAE, Pakistan, and worldwide. Our team consists of highly skilled, innovative, and seasoned graphic and web designers, website developers, digital marketers, and data s
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Karachi, Sindh, Pk
Services Provided+9 Services
10% Custom Web Application Development
9% Mobile App Development (iOS & Android)
5% E-Commerce Development
1% Legacy System Modernization
AI Summary
“Book My Order offers comprehensive web and mobile app development services, including UI/UX design, e-commerce, chatbot development, and AI solutions, serving clients globally since 2016.”
VMIT TECHNOLOGIES PRIVATE LIMITED
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VMIT Technologies Pvt. Ltd. is a start-up private limited company that aims to introduce innovative products for both the mass market and niche segments. "As a company, we are dedicated to delivering innovative solutions that promote convenience and security in society. Our foundation is built on th
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Mumbai, Maharashtra, In
Services Provided+8 Services
13% Custom Web Application Development
10% Mobile App Development (iOS & Android)
3% Legacy System Modernization
8% Mobile App UI Design
AI Summary
“VMIT Technologies Pvt. Ltd. is a startup focused on innovative technological solutions enhancing communication, convenience, and security through research-driven products for diverse market segments.”
Medusa Consulting
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From the initial idea to the final execution, we collaborate closely with our clients to provide robust technical solutions that meet their goals. Our varied team of engineers and designers is equipped to tackle challenges of any magnitude. At Medusa Consulting, we don’t just create outstanding soft
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Asuncion, Py
Services Provided+3 Services
15% Custom Web Application Development
5% Legacy System Modernization
5% Mobile App Development (iOS & Android)
10% IT Compliance & Governance
AI Summary
“Medusa Consulting partners with clients from idea to execution, delivering innovative, robust software solutions through a diverse team of engineers and designers, fostering long-term collaboration.”
Peleno Web
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We are a comprehensive web development studio assisting businesses in creating, updating, and enhancing high-performance websites. Our team of 14 experts is dedicated to delivering solutions that prioritize speed, user experience, and conversions, enabling companies to expand their online presence.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Vinnytsia, Vinnytsia, Ua
Services Provided+4 Services
17% Custom Web Application Development
7% Mobile App Development (iOS & Android)
5% Legacy System Modernization
5% QA & Software Testing
AI Summary
“Peleno Web is a web development studio of 14 experts delivering high-performance websites focused on speed, user experience, and conversions to enhance business online presence.”
Bravo Zulu
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Driven by innovation and the desire to enhance our clients' profitability, we transform aspirations and ideas into tangible success stories. As a digitally-oriented agency, we have established robust partnerships in areas like media buying, public relations, and market research. Our process at Bravo
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Petrie Terrace, Queensland, Au
Services Provided+3 Services
14% Mobile App Development (iOS & Android)
17% Custom Web Application Development
3% Legacy System Modernization
20% Product UX Strategy
AI Summary
“Bravo Zulu is a digital agency specializing in media buying, public relations, and market research, delivering innovative, data-driven solutions that enhance client profitability through in-depth problem analysis.”
Stackroft
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Stackroft serves as a technology partner, providing scalable and high-performance digital solutions tailored for contemporary businesses. We integrate engineering expertise, cloud-native architectures, and AI-driven innovations to assist organizations in growing and excelling in a fast-changing digi
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Sheridan, Wyoming, Us
Services Provided+12 Services
3% Mobile App Development (iOS & Android)
1% E-Commerce Development
2% Legacy System Modernization
5% Custom Web Application Development
AI Summary
“Stackroft delivers scalable, high-performance digital solutions combining engineering expertise, cloud-native architectures, and AI innovations, empowering businesses to thrive in dynamic digital environments.”
Eifasoft Technologies
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EifaSoft Technologies is a top MLM and software development firm in India, boasting over 12 years of experience and more than 500 completed projects. The company focuses on tailored MLM software, blockchain solutions (such as smart contracts, DApps, and crypto exchanges), AI/ML services (including c
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
10% Custom Web Application Development
8% Mobile App Development (iOS & Android)
8% API Development & Integration
5% E-Commerce Development
AI Summary
“EifaSoft Technologies, an Indian firm with 12+ years experience, delivers tailored MLM, blockchain, AI/ML, web, mobile, and enterprise software solutions across 15+ cities.”
Ventera
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Ventera aims to provide top-notch solutions and attain business results that benefit both our clients and our company. We are dedicated to meeting all relevant customer, legal, and regulatory standards. By emphasizing quality, Ventera's process minimizes risks, ensures consistency, and enhances cust
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
50-249
Employees
Reston, Virginia, Us
Services Provided+9 Services
3% Blockchain & Web3 Development
13% Custom Web Application Development
7% Mobile App Development (iOS & Android)
7% QA & Software Testing
AI Summary
“Ventera delivers high-quality solutions focused on client satisfaction, regulatory compliance, and continuous improvement, ensuring consistent results and minimized risks across diverse business needs.”
Refactory
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Refactory is a digital technology facilitator based in Indonesia. Established in 2015 in Surabaya, it launched its inaugural Bootcamp in Bandung in 2017. Since then, Refactory has expanded its offerings beyond Bootcamp, introducing a range of solutions aimed at equipping young Indonesians with progr
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Sleman, Yogyakarta Special Region, Id
Services Provided+7 Services
5% Mobile App Development (iOS & Android)
3% Legacy System Modernization
5% QA & Software Testing
5% Backend Development
AI Summary
“Refactory is an Indonesian digital technology facilitator providing programming education and diverse solutions since 2015, empowering youth and supporting local and global business growth.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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