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

MSET
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We are a software engineering firm dedicated to creating reliable, long-term development teams for clients around the globe. Our approach is straightforward: we closely integrate with our clients' current engineering frameworks, take charge of project delivery, and ensure consistent, predictable res
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
18% Custom Web Application Development
20% Backend Development
10% Frontend Development
3% Legacy System Modernization
AI Summary
“MSET is a software engineering firm specializing in integrated, reliable development teams delivering web, mobile, backend, and cloud solutions with modern technologies and high-quality standards globally.”
APNTTech Private Limited
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We are an IT firm that collaborates with you to explore and innovate, providing solutions tailored to any demographic. Our focus is on delivering high-quality code and expertise aimed at creating scalable software solutions and products. Unlike typical software companies, we are logical thinkers ded
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+10 Services
10% Custom Web Application Development
7% Mobile App Development (iOS & Android)
5% Backend Development
5% Frontend Development
AI Summary
“APNTTech Private Limited is an India-based IT firm specializing in scalable software solutions, digital transformation, and emerging technologies, serving clients globally with expertise in product engineering and cloud services.”
Focalworks Solutions Pvt. Ltd.
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At Focalworks, we are dedicated to making a difference through technology. Founded in 2008, we have become a reliable solutions provider for global organizations, digital agencies, consulting firms, and startups in need of comprehensive web, mobile, and cloud technology solutions. In the realm of
Highlights
50-249
Employees
Navi Mumbai, Maharashtra, In
Services Provided+13 Services
5% SaaS Product Development
5% API Development & Integration
7% Custom Web Application Development
5% Mobile App Development (iOS & Android)
AI Summary
“Focalworks Solutions Pvt. Ltd. offers comprehensive web, mobile, cloud, and e-commerce technology solutions, leveraging agile development to support digital transformation and innovation for global clients.”
ThickDot
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At ThickDot, we connect advanced technology with practical business requirements. Based in North America, we offer the advantages of a locally managed operation that fosters smooth communication and cultural compatibility, alongside a globally experienced technical team boasting over 15 years of exp
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+3 Services
30% Custom Web Application Development
15% E-Commerce Development
5% Legacy System Modernization
20% AI Strategy & Roadmap Consulting
AI Summary
“ThickDot integrates advanced technology with business needs, delivering innovative, affordable solutions through a locally managed North American operation and a globally experienced technical team.”
Luna Studio
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A design and development agency that assists startups and emerging brands in transforming ideas into refined digital products. At Luna, we develop a wide range of offerings, including complete mobile applications, product interfaces, websites, social media content, pitch presentations, and email mar
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Madrid, Madrid, Es
Services Provided+3 Services
15% Mobile App Development (iOS & Android)
12% Custom Web Application Development
3% Legacy System Modernization
3% QA & Software Testing
AI Summary
“Luna Studio is a versatile design and development agency helping startups and brands create and launch digital products, offering tailored services from design to marketing for growth and differentiation.”
Invisigent
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We assist companies in reducing manual tasks and scaling more efficiently by providing tailored AI agents, automation solutions, and software dashboards. Our offerings are specifically designed for your operations, not just generic tools.
Highlights
Services Provided+3 Services
25% AI Agent & Multi-Agent System Development
10% AI Strategy & Roadmap Consulting
15% Generative AI
20% Custom Web Application Development
AI Summary
“Invisigent delivers tailored AI agents, automation solutions, and software dashboards to help companies minimize manual tasks and enhance operational efficiency and scalability.”
WebInfoMart (MCSAM)
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We are a specialized firm based in Gurugram focused on "Product Development," assisting brands such as PayU, CII, Denave, HDFC, and Syndicate Bank in creating various web and software products with the latest technology stacks. We also offer contractual onsite resources with an industry-leading mini
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Gurugram, Haryana, In
Services Provided+10 Services
3% CMS Development & Customization
5% Backend Development
1% Legacy System Modernization
5% Mobile App Development (iOS & Android)
AI Summary
“WebInfoMart (MCSAM) is a Gurugram-based firm specializing in product development, offering web and software solutions, contractual resources, and ongoing support using modern technologies.”
vimigo Technologies Sdn Bhd
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vimigo Technologies has quickly established itself as a dynamic and agile provider of Information Technology (IT) solutions. We are committed to delivering top-notch solutions that meet internationally recognized standards for your IT requirements. Our clientele spans Australia, Singapore, the Unite
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Kuala Lumpur, My
Services Provided+4 Services
7% QA & Software Testing
14% Custom Web Application Development
10% Mobile App Development (iOS & Android)
3% Legacy System Modernization
AI Summary
“vimigo Technologies Sdn Bhd delivers tailored, internationally recognized IT solutions across multiple regions with a skilled team committed to long-term client success and innovation.”
Amber Soft
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AmberCore is a delivery team guided by the CTO that assists founders in developing MVPs and expanding production systems. With over 8 years of experience in creating essential software, we have completed more than 140 projects and work with over 15 technologies in production. We prioritize speed whi
Highlights
$10,000+
Min Project Size
10-49
Employees
Services Provided+6 Services
14% Custom Web Application Development
5% Mobile App Development (iOS & Android)
12% API Development & Integration
3% Legacy System Modernization
AI Summary
“Amber Soft, led by CTO, delivers MVPs and production systems with 8+ years experience, excelling in AI, backend, infrastructure, integrations, and Web3 technologies through focused, accountable engineering.”
Prince Digital Production
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Prince Digital Production ranks among the leading web development agencies globally. We enhance the performance of content publishers and digital agencies through strategic collaborations. By effectively combining the strengths of Eastern and Western cultures, we strategically position our globally
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+8 Services
13% E-Commerce Development
7% Legacy System Modernization
5% Unified Communications Consulting & SI
5% CRM Consulting and SI
AI Summary
“Prince Digital Production is a global web development leader specializing in WordPress implementations, AI-driven CRM, branding, digital marketing, and data analytics for diverse enterprises.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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