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

INTECH Creative Services Pvt Ltd
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INTECH is a technology partner with over 21 years of experience, boasting a team of more than 700 engineers and delivery centers situated in India, the USA, UAE, and Hong Kong. We focus on implementing Odoo and Oracle ERP solutions, providing AI/ML services, and facilitating digital transformation f
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
250-999
Employees
Gandhinagar, Gujarat, In
Services Provided+17 Services
6% Custom Web Application Development
5% API Development & Integration
4% Mobile App Development (iOS & Android)
8% ERP & CRM Development
AI Summary
“INTECH Creative Services Pvt Ltd delivers comprehensive technology solutions including ERP implementation, AI-driven automation, managed IT services, and strategic consulting, driving digital transformation across diverse industries globally.”
Aurora TechLab
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Aurora TechLab is a software development company that specializes in custom solutions for various clients including startups, product companies, and SMBs. For startups, we create products that align with user needs and generate revenue, assisting with everything from delivery roadmaps and validating
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Wroclaw, Pl
Services Provided+5 Services
8% Mobile App Development (iOS & Android)
15% Custom Web Application Development
7% QA & Software Testing
3% Legacy System Modernization
AI Summary
“Aurora TechLab delivers tailored custom software, UX/UI design, and business consulting to startups, SMBs, and product companies, enhancing market fit, efficiency, and software quality globally.”
Stabilix Corporation
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Software and Data Engineers experienced in the healthcare, insurance, and identity management sectors. We bring more than 26 years of expertise in various projects, including 1) Identity and Access Management (IAM) 2) User Interface/User Experience (UI/UX) 3) DevOps 4) Big Data/Machine Learning (ML)
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
San Antonio, Texas, Us
Services Provided+10 Services
6% API Development & Integration
1% E-Commerce Development
4% Legacy System Modernization
9% Custom Web Application Development
AI Summary
“Stabilix Corporation specializes in software and data engineering, delivering solutions in IAM, UI/UX, DevOps, big data, and mobile/web applications with 26 years' healthcare and insurance expertise.”
Purpledecks
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We take your concept for a new product or service and merge it with your key strengths, subject matter expertise, and invaluable domain knowledge, alongside our exceptional capability to develop award-winning digital products. We can collaborate with your team at every stage of the process, from the
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Longford, Leinster, Ie
Services Provided+5 Services
7% Backend Development
3% Legacy System Modernization
10% Mobile App Development (iOS & Android)
5% Frontend Development
AI Summary
“Purpledecks specializes in developing award-winning digital products and FDA/EMA-compliant software, collaborating extensively to deliver tailored mobile, web, and cloud solutions for medical device applications.”
Revolo Infotech
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We have developed software, mobile applications, and web solutions for businesses worldwide. From online platforms to AI and machine learning-driven Android and iOS apps, we've collaborated with both corporations and startups to bring their concepts to fruition.
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Mumbai, Maharashtra, In
Services Provided+9 Services
10% Mobile App Development (iOS & Android)
4% Legacy System Modernization
3% QA & Software Testing
5% Backend Development
AI Summary
“Revolo Infotech delivers comprehensive software, mobile, and web solutions globally, leveraging expertise in AI, machine learning, and cross-platform development to support startups and corporations.”
BurjSoft, LLC
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At BurjSoft, we view software development as more than simply writing code; it's about assembling a dedicated team of skilled professionals tailored to each project's needs, ensuring timely and budget-conscious delivery. Our "Hybrid Model" combines the legal and financial protection of a US LLC with
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Miami, Florida, Us
Services Provided+3 Services
18% Custom Web Application Development
13% API Development & Integration
2% Blockchain & Web3 Development
12% Mobile App Development (iOS & Android)
AI Summary
“BurjSoft, LLC combines US legal assurance with agile software development, delivering tailored web, mobile, and cloud solutions across industries using modern technologies for scalable digital growth.”
Wattage
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Wattage serves as a design engineering partner for agencies and product teams. We transform designs into deployable products, managing everything from initial Figma layouts to final infrastructure deployment. Our white-label services integrate seamlessly with your team, addressing both design and te
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
Pleasant Prairie, Wisconsin, Us
Services Provided+4 Services
28% Custom Web Application Development
5% Legacy System Modernization
8% Product UX Strategy
10% Wireframing & Prototyping
AI Summary
“Wattage partners with agencies and product teams to transform designs into deployable products, providing seamless white-label engineering services from design to infrastructure deployment.”
Draxon Systems
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Draxon Systems is a development agency that emphasizes product creation, specializing in scalable web platforms, SaaS offerings, and business automation systems. With over eight years of experience, we assist startups and large enterprises in developing high-performance digital products that address
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
New York, New York, Us
Services Provided+8 Services
14% Custom Web Application Development
12% SaaS Product Development
3% E-Commerce Development
3% Frontend Development
AI Summary
“Draxon Systems is an experienced development agency specializing in scalable web platforms, SaaS, e-commerce, UX/UI design, and branding, delivering robust, maintainable digital solutions for diverse industries.”
HBM
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We collaborate with startups and enterprises to create tailored software and AI solutions, crafted by seasoned technology experts who bring years of practical experience with distributed teams. We oversee the entire process with careful attention—from initial discovery to post-launch support. What
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Budapest, Budapest, Hu
Services Provided+18 Services
4% Frontend Development
3% Legacy System Modernization
3% CMS Development & Customization
5% Backend Development
AI Summary
“HBM delivers tailored software, AI, cloud, and IT consulting services through seasoned experts, ensuring secure, scalable solutions with efficient execution and strategic business support.”
Avantech Web Grid (Software Development Company)
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Web Grid is a leading and adaptable software development firm based in Hyderabad, providing an extensive array of dependable web and mobile services. These include web design and development, UI/UX design, e-commerce solutions, CMS development, native and cross-platform mobile app development, IT se
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Hyderabad, Telangana, In
Services Provided+14 Services
7% Mobile App Development (iOS & Android)
2% Legacy System Modernization
3% CMS Development & Customization
3% E-Commerce Development
AI Summary
“Avantech Web Grid in Hyderabad delivers comprehensive software development, web and mobile app services, digital marketing, and IT solutions, emphasizing customization and cross-platform capabilities.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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