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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We evaluate companies on verified profile data: services, pricing, locations, and portfolio. Client reviews are being collected. We may earn a fee for some placements. How we rank and verify

4,482 Companies

List of the Best Legacy System Modernization Agencies

V-Mobile
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As a genuinely mobile-first and always mobile-focused team, we are excited to provide comprehensive mobile development services for your B2B or B2C applications. Our Areas of Expertise Include: - Native & Hybrid Mobile App Development - Mobile IoT Solutions - AI-Enhanced Mobile Apps - Mobile App Red
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Yerevan, Am
Services Provided+2 Services
43% Mobile App Development (iOS & Android)
8% Legacy System Modernization
10% AI Strategy & Roadmap Consulting
12% Custom AI Chatbot Development
AI Summary
“V-Mobile specializes in comprehensive mobile development services, offering tailored native, hybrid, IoT, and AI-enhanced solutions with collaborative, cross-functional teams ensuring quality and business alignment.”
Exaud
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We are a specialized software development and technical consultancy that connects traditional engineering with future advancements. As an AI leader, we create innovative custom software and provide impactful development services for Fortune 1000 companies, large corporations, and mid-sized businesse
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Ermesinde, Pt
Services Provided+2 Services
23% Custom Web Application Development
18% Mobile App Development (iOS & Android)
10% Legacy System Modernization
20% Generative AI
AI Summary
“Exaud is a specialized software development firm blending engineering and AI expertise to deliver custom solutions across automotive, fintech, healthcare, and embedded systems for leading global clients.”
Frogslayer
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Brands focused on enhancing guest experiences collaborate with Frogslayer to synchronize their systems, data, and interactions, ensuring guests remain engaged, operations are optimized, and each venue excels. Whether it's family entertainment centers, cinemas, restaurant chains, or amusement parks,
Highlights
$25,000+
Min Project Size
50-249
Employees
College Station, Texas, Us
Services Provided+6 Services
17% Legacy System Modernization
14% Custom Web Application Development
3% Mobile App Development (iOS & Android)
3% Custom AI Chatbot Development
AI Summary
“Frogslayer partners with hospitality brands to modernize and integrate digital systems, optimizing guest engagement and operations across entertainment, dining, and leisure venues with scalable technology solutions.”
LINKERSOFT GROUP
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Revolutionize Your Business with Tailored .NET Solutions
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Batumi, Ge
Services Provided+5 Services
28% Custom Web Application Development
18% Legacy System Modernization
5% API Development & Integration
8% AI Agent & Multi-Agent System Development
AI Summary
“LINKERSOFT GROUP specializes in delivering customized .NET software solutions, enhancing business performance through innovative, tailored technology services across various industries.”
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NIkhil Ai Agency
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Nikhil AI Agency is a contemporary product development studio that specializes in quickly creating MVPs, AI-driven SaaS solutions, automation systems, and efficient web applications. We assist founders, startups, and businesses in transforming concepts into real, scalable products swiftly and reliab
Highlights
$1,000+
Min Project Size
2-9
Employees
Services Provided
45% Custom Web Application Development
15% Mobile App Development (iOS & Android)
20% E-Commerce Development
20% Legacy System Modernization
AI Summary
“Nikhil AI Agency is a product development studio specializing in fast delivery of scalable AI-driven SaaS, MVPs, automation systems, and web applications, focusing on quality and user experience.”
Leapwise
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Leapwise is a software engineering firm that operates in dynamic, fast-paced environments, including enterprise-grade settings, scale-ups, and startups. We provide robust and scalable niche products designed to enhance operations and improve service delivery, helping our clients maintain agile and e
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Zagreb, Grad Zagreb, Hr
Services Provided
25% Custom Web Application Development
9% Legacy System Modernization
33% Other IT Consulting and SI
33% Cybersecurity Assessments & Hardening
AI Summary
“Leapwise delivers custom software development, AI-driven consulting, cybersecurity, and system integration services, empowering diverse industries with robust, scalable solutions and dedicated collaborative teams for digital transformation.”
ThinkAiCorp
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Think AI serves as a reliable strategic ally for business leaders seeking to address intricate challenges through contemporary technologies such as AI, business intelligence, and chatbots. Partnering with Think AI equips you to tackle these complexities with an effective strategy, a well-defined pla
Highlights
250-999
Employees
Irvine, California, Us
Services Provided+1 Services
35% Mobile App Development (iOS & Android)
15% Legacy System Modernization
25% AI Strategy & Roadmap Consulting
20% BI & Big Data Consulting & SI
AI Summary
“ThinkAiCorp specializes in AI development, business intelligence, and software modernization, delivering strategic, AI-driven solutions and modern mobile applications to address complex business challenges effectively.”
Amdaris
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Amdaris elevates business software by providing exceptional teams. We specialize in outstanding software development, application support, and digital transformation projects. As premier problem solvers, we connect the right individuals with the right tasks and work together seamlessly. Our clients
Highlights
$25,000+
Min Project Size
250-999
Employees
Bristol, England, Gb
Services Provided+3 Services
13% Custom Web Application Development
8% Mobile App Development (iOS & Android)
10% Backend Development
7% Frontend Development
AI Summary
“Amdaris delivers expert software development, digital transformation, and managed application support globally, partnering with diverse clients to provide tailored, agile solutions and mitigate project risks.”
Variant Systems
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We founded Variant Systems after years of developing various products, including healthcare platforms, fintech solutions, and SaaS at different stages. Then, AI tools significantly advanced. Suddenly, founders using tools like Cursor could construct an application in just one afternoon. Copilot coul
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
New Delhi, Delhi, In
Services Provided+5 Services
15% Custom Web Application Development
5% Mobile App Development (iOS & Android)
5% E-Commerce Development
18% Legacy System Modernization
AI Summary
“Variant Systems specializes in enhancing AI-generated software by combining skilled engineering with AI tools to optimize performance, code quality, and maintainability across healthcare, fintech, and SaaS domains.”
Voiceano
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We are a startup located in Delhi, India, specializing in the design and development of voice applications. Our goal is to offer tailored solutions that enable users to enhance their business through voice assistants. Our team is committed to creating voice applications for businesses and consists o
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Ghaziabad, Uttar Pradesh, In
Services Provided
50% Custom Web Application Development
38% Mobile App Development (iOS & Android)
12% Legacy System Modernization
AI Summary
“Voiceano, an Indian startup, specializes in designing and developing customized voice applications, mobile software, and enterprise solutions to enhance business experiences through innovative voice technology.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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