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

Tooktech Web Technologies
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Tooktech Web Technologies is a Romanian software firm established in 2015 in Timisoara. We specialize in creating and providing exceptional software solutions that significantly enhance our clients' operations in areas such as efficiency, revenue generation, cost savings, and digital automation. Our
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Timisoara, Timis, Ro
Services Provided+1 Services
13% API Development & Integration
15% Mobile App Development (iOS & Android)
7% Legacy System Modernization
15% Custom Web Application Development
AI Summary
“Tooktech Web Technologies is a Romanian software firm delivering custom software, web and mobile applications, and advanced integrations to enhance business efficiency across varied industries since 2015.”
Geomotiv
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Geomotiv is a leading AdTech company that provides advanced, AI-based advertising solutions for enterprise publishers, brands, and platforms. We develop and integrate AI-driven programmatic, video/CTV, and analytics systems to enhance campaign effectiveness, minimize costs, and adapt to client requi
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
250-999
Employees
Lisboa, Lisbon, Pt
Services Provided+4 Services
20% Custom Web Application Development
3% E-Commerce Development
10% Legacy System Modernization
14% AI Strategy & Roadmap Consulting
AI Summary
“Geomotiv specializes in AI-driven AdTech solutions, offering advanced programmatic, video, and analytics systems to optimize enterprise advertising campaigns with scalable, results-oriented technologies.”
Objectivity Ltd. - Out of Business
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Objectivity Ltd., founded in 1991, is a technology partner focused on delivering custom cloud software solutions. Our goal is to provide professional IT services that enable organizations to gain a genuine competitive edge by utilizing cutting-edge technologies and innovative ideas. As your software
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
250-999
Employees
Coventry, England, Gb
Services Provided+1 Services
43% Custom Web Application Development
8% Legacy System Modernization
12% Other IT Consulting and SI
22% Cloud Consulting & SI
AI Summary
“Objectivity Ltd. specialized in delivering custom cloud software solutions with expertise in web applications, AI, and consulting, emphasizing collaboration and cutting-edge technology since 1991.”
Mechsoft Digital Technologies
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Do you have a difficult task ahead of you? A complex issue requiring carefully designed algorithms? Are you searching for a reliable team to bring your ideas to life? Do you need a trustworthy partner willing to put in extra effort and go above and beyond for you? Mechsoft boasts over 25 years of ex
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Pimpri-Chinchwad, Maharashtra, In
Services Provided+3 Services
20% Custom Web Application Development
8% Mobile App Development (iOS & Android)
8% E-Commerce Development
15% Legacy System Modernization
AI Summary
“Mechsoft Digital Technologies delivers tailored software development, modernization, and tech mentoring across diverse industries, leveraging 25+ years of expertise to drive innovation and measurable business success.”
SoftRize
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SoftRize is a software development service provider located in Kiev, Ukraine. We deliver innovative software solutions designed to help businesses innovate and explore new market opportunities. With over a decade of experience, a team of more than 25 software engineers, and over 50 completed project
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Kyiv, Ua
Services Provided
40% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% Blockchain & Web3 Development
10% Legacy System Modernization
AI Summary
“SoftRize is a Kiev-based software development firm offering full-stack solutions across diverse sectors like healthcare, fintech, and education, leveraging over 10 years of expertise to deliver innovative digital products.”
KORSENEX
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Korsenex LLP is a technology startup recognized by DPIIT and based in Bhubaneswar, Odisha. We focus on creating high-performance B2B SaaS products, tools for Enterprise Automation, and solutions for Government Technology (GovTech). Founded by a team of dedicated engineers, our goal is to connect int
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Bhubaneswar, Odisha, In
Services Provided
40% Custom Web Application Development
30% API Development & Integration
20% Mobile App Development (iOS & Android)
10% Legacy System Modernization
AI Summary
“Korsenex LLP, an Odisha-based tech startup, develops AI-driven B2B SaaS solutions across GovTech, retail, hospitality, and smart agriculture, enhancing automation and operational efficiency in India.”
Coremaitri Software
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Operating a business without data and software is unfeasible. Creating, developing, and managing software can be challenging. With a focus on transparency and a people-oriented approach, we are always prepared to assist you with even the most ambitious software projects you can imagine.
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Long Beach, California, Us
Services Provided
15% Legacy System Modernization
15% ERP & CRM Development
20% Custom Web Application Development
50% ERP Consulting and SI
AI Summary
“Coremaitri Software specializes in delivering transparent, people-focused software development and management services, supporting clients through complex and ambitious digital projects with expert assistance.”
We Build Products GmbH
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We Build Products GmbH is a software agency established by experienced experts from the financial services sector, offering specialized knowledge in software engineering, product development, and data solutions for banks and fintech companies. Our team has decades of experience within leading banks,
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Berlin, Berlin, De
Services Provided+8 Services
15% Legacy System Modernization
10% ERP & CRM Development
3% Robotic Process Automation (RPA)
1% CRM Consulting and SI
AI Summary
“We Build Products GmbH specializes in software engineering and product development for banks and fintechs, delivering scalable, compliant, and efficient technology solutions backed by extensive industry expertise.”
Pijunity Technology OPC Private Limited
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Pijunity Technology (OPC) Private Limited is a technology-oriented firm located in Pune, India, founded in 2025. Our goal is to create secure, scalable, and cutting-edge software solutions for the digital era. We focus on core software development, which includes creating, adjusting, and testing rob
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Pune, Maharashtra, In
Services Provided+2 Services
14% Legacy System Modernization
20% Custom Web Application Development
13% Managed IT Services
13% Cybersecurity Assessments & Hardening
AI Summary
“Pijunity Technology OPC Private Limited, based in Pune since 2025, develops secure, scalable software solutions emphasizing innovation, transparency, and performance to meet evolving business needs.”
Mediaset LLC
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Mediaset is a comprehensive digital agency with a decade of experience and a team of more than 45 skilled professionals. We specialize in the architecture, design, development, and support of enterprise-level web, mobile, and software platforms, assisting clients in reaching their objectives and exp
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Brooklyn, New York, Us
Services Provided
40% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% E-Commerce Development
10% Legacy System Modernization
AI Summary
“Mediaset LLC is a digital agency specializing in enterprise-level web, mobile, and software solutions, offering end-to-end design, development, and support with a focus on quality and innovation.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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