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

Majikode
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We are a product development consulting firm focused on meeting deadlines. What can we offer? We can effortlessly resolve your issues. Your project deserves more than just being "almost finished." Whether it's reviving neglected codebases or meeting tight deadlines, we step in when the pressure is o
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
17% Custom Web Application Development
14% Legacy System Modernization
3% API Development & Integration
33% IT Compliance & Governance
AI Summary
“Majikode is a product development consulting firm specializing in reviving codebases and meeting tight deadlines, delivering reliable solutions when projects face critical challenges.”
Kahoa
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Kahoa is a strategic consulting firm focused on digital business. We harness technology to help innovators achieve their goals, thriving on tackling significant challenges. Our expertise lies in creating high-quality, enterprise-level software systems that promote and sustain growth. We cater to a w
Highlights
$100,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
50-249
Employees
Lehi, Utah, Us
Services Provided+2 Services
30% Custom Web Application Development
10% Mobile App Development (iOS & Android)
10% Legacy System Modernization
25% Product UX Strategy
AI Summary
“Kahoa is a strategic consulting firm specializing in high-quality, enterprise-level software solutions across industries like network marketing, edtech, and e-commerce, combining agile methods and expert teams to drive digital growth.”
F&S Digital
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At F&S Digital, we specialize in designing, developing, deploying, and managing personalized websites, web applications, and mobile apps. We provide tailored digital solutions for businesses and events of all sizes and industries, working closely with you as your dedicated software development partn
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Ventnor City, New Jersey, Us
Services Provided
45% Custom Web Application Development
45% Mobile App Development (iOS & Android)
10% Legacy System Modernization
AI Summary
“F&S Digital delivers custom cloud-based websites, web and mobile applications with zero-maintenance solutions, ensuring accessible, secure, and fully supported digital platforms for diverse businesses and events.”
KK Infocrat Nihon
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Infocrat specializes in developing web applications, mobile applications, and other customized software projects in Bangladesh and Japan. The company operates under an offshore development model and was established in Bangladesh in 2007. We are well-equipped with a team of over 30 members and utiliz
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Dhaka, Dhaka, Bd
Services Provided
45% Custom Web Application Development
45% Mobile App Development (iOS & Android)
10% Legacy System Modernization
AI Summary
“KK Infocrat Nihon, established in 2007, specializes in custom web and mobile applications and software modernization, leveraging modern technologies with a skilled offshore team in Bangladesh and Japan.”
Logiology Solutions Pvt. Ltd.
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We are among the premier companies in India offering ERP software specifically for the jewellery industry. Since our establishment, we have dedicated our efforts and resources to creating ERP solutions (including accounting and inventory management software) tailored for jewellery manufacturers, who
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Kozhikode, Kerala, In
Services Provided
50% Custom Web Application Development
15% Mobile App Development (iOS & Android)
30% E-Commerce Development
5% Legacy System Modernization
AI Summary
“Logiology Solutions Pvt. Ltd. delivers specialized ERP software tailored for India's jewellery industry, enhancing transparency, efficiency, and productivity across manufacturing, wholesale, and retail operations.”
Erbis
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Erbis is a trusted technology leader that focuses on expert development and delivery to enhance revenue growth, minimize inefficiencies, and increase profits. With a skilled team of over 100 engineers, we have effectively reduced costs by $110 million for over 45 clients around the globe from our th
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+7 Services
13% Legacy System Modernization
25% Custom Web Application Development
13% Mobile App Development (iOS & Android)
5% Conversational AI & Voice Assistant Development
AI Summary
“Erbis, a global technology leader with 100+ engineers, delivers tailored development services that optimize revenue, reduce costs, and enhance efficiency through flexible collaboration models.”
Shard Labs
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Founded in 2019, we are a startup dedicated to guiding our clients through a comprehensive digital transformation. Our agile team of consultants and developers, based in Zagreb, manages every aspect of successful project delivery, from strategy and planning to the implementation of digital solutions
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Split, Split Dalmatia, Hr
Services Provided
60% Blockchain & Web3 Development
25% Custom Web Application Development
5% Legacy System Modernization
10% API Development & Integration
AI Summary
“Founded in 2019 in Zagreb, Shard Labs offers comprehensive digital transformation services, combining technical expertise and business insight to deliver tailored solutions enhancing client operations and engagement.”
Propel Tech Ltd
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As a specialized bespoke software development firm, we do more than just address software issues; we create solutions that facilitate change, enabling your business to thrive and expand. With offices located in Leeds and London and a hybrid workforce, we take pride in our UK team’s collaboration wit
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
50-249
Employees
Horbury, Gb
Services Provided+2 Services
15% Backend Development
10% Legacy System Modernization
5% ERP & CRM Development
8% Frontend Development
AI Summary
“Propel Tech Ltd. specializes in bespoke software development, offering migration, modernization, augmentation, and digital transformation services to enhance business efficiency and growth across UK sectors.”
iorta Technology Solutions
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iorta Technology Solutions enables insurance and lending companies to leverage AI-powered automation, simplifying sales, operations, and claims management. Our solutions improve efficiency, transparency, and decision-making, allowing businesses to grow more rapidly and provide better service to thei
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
50-249
Employees
Services Provided
60% API Development & Integration
30% Mobile App Development (iOS & Android)
10% Legacy System Modernization
AI Summary
“iorta Technology Solutions delivers AI-driven automation to enhance sales, operations, and claims workflows in insurance and lending, boosting efficiency and customer service in BFSI sectors.”
Ogun Labs
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Our knowledgeable team members possess degrees in engineering and business from prestigious institutions such as MIT, Stanford, Harvard, and Georgia Tech, specializing in areas like AI, software architecture, and entrepreneurship. We offer significant experience in the startup ecosystem and have col
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Los Angeles, California, Us
Services Provided+2 Services
12% Mobile App Development (iOS & Android)
8% Legacy System Modernization
14% Custom Web Application Development
20% Web App UI Design
AI Summary
“Ogun Labs delivers expert mobile and web app development, AI-driven automation, and intuitive UI/UX design, powered by a skilled team with top-tier academic and industry experience.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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