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

Musketeers Tech Inc.
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🚀 Established in 2016, Musketeers Tech Inc has rapidly become a leading provider of comprehensive digital solutions, serving over 30 clients and completing more than 100 projects. Our Services include: 🎓 EdTech: Transforming education with innovative digital platforms and tools. 🌐 Metaverse: Crea
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Austin, Texas, Us
Services Provided+3 Services
20% Generative AI
20% IT Staff Augmentation
15% Software Development Services
15% Legacy System Modernization
AI Summary
“Founded in 2016, Musketeers Tech Inc offers comprehensive digital solutions, including EdTech, metaverse, e-commerce, cloud services, cybersecurity, and tailored business applications to drive growth.”
Endava
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Endava is a publicly traded technology firm with more than 18 years of experience collaborating with top companies in sectors such as Finance, Insurance, Telecommunications, Media, Technology, and Retail. By offering solutions in Digital Evolution, Agile Transformation, and Automation, Endava assist
Highlights
1000-9999
Employees
London, England, Gb
Services Provided
38% Custom Web Application Development
13% Legacy System Modernization
32% Operational Process Consulting
17% Go-to-Market Strategy
AI Summary
“Endava is a public technology company delivering digital evolution, agile transformation, and automation services across multiple industries, with global offices and a focus on client partnerships and career growth.”
Xoho Tech, Inc
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Xoho Tech is a leading company specializing in DevOps and network services, cloud migration and consulting, big data consulting, enterprise mobile app development, and web development. We provide sophisticated solutions across various technology platforms to a diverse clientele that includes both mu
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
New York, New York, Us
Services Provided
40% Custom Web Application Development
40% Mobile App Development (iOS & Android)
10% E-Commerce Development
10% Legacy System Modernization
AI Summary
“Xoho Tech, Inc. delivers expert DevOps, cloud migration, big data, and application development services, serving diverse clients with tailored software solutions and extensive technical proficiency for over 20 years.”
Webtonic Solutions
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At Webtonic Solutions, we take pride in being leaders in custom software development, delivering digital solutions that are both innovative and effective in addressing real-world challenges. With over ten years of industry experience, we have established ourselves as specialists in all facets of cus
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Sandton, Za
Services Provided
35% Custom Web Application Development
10% E-Commerce Development
5% Legacy System Modernization
50% Cloud Consulting & SI
AI Summary
“Webtonic Solutions delivers innovative, scalable software and cloud services, specializing in custom development, e-commerce, and cloud infrastructure across global markets with a client-centric approach.”
GeneXus Consulting
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Through a strong partnership with our clients, we create, build, and execute dependable, innovative solutions that significantly affect their businesses. We undertake projects aimed at establishing essential digital solutions for organizations undergoing digital transformation. By blending expertise
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Montevideo, Montevideo, Uy
Services Provided
40% Mobile App Development (iOS & Android)
40% Custom Web Application Development
10% Legacy System Modernization
10% QA & Software Testing
AI Summary
“GeneXus Consulting partners with clients to deliver innovative digital transformation solutions, combining expertise and technical skills to enhance business models and competitiveness.”
Respoworks Technologies Private Limited
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"Regardless of your industry, it's essential for every business to embrace digital transformation." We provide a step-by-step strategy to assist your business and support IT teams in aligning their objectives with the broader business vision.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Udumalaipettai, Tamil Nadu, In
Services Provided+3 Services
15% Custom Web Application Development
8% QA & Software Testing
10% Legacy System Modernization
10% Mobile App Development (iOS & Android)
AI Summary
“Respoworks Technologies Private Limited offers strategic digital transformation solutions, helping businesses and IT teams align objectives to enhance overall organizational growth and efficiency.”
Bridge CRM
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Bridge is an AI-driven CRM platform recognized by SAP, specifically designed to manage the intricate ecosystems of manufacturing and distribution companies. Since its launch, Bridge has led the way in digital transformation, connecting fragmented data with operational realities. Our modular platform
Highlights
50-249
Employees
Brooklyn, New York, Us
Services Provided
70% Custom Web Application Development
20% Mobile App Development (iOS & Android)
10% Legacy System Modernization
AI Summary
“Bridge CRM is an AI-driven platform integrating sales, operations, and logistics for manufacturing and distribution, enhancing decision-making with intelligent insights and unified ecosystem management.”
Zertain
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Zertain is a consulting-focused IT services firm that specializes in hyperautomation, low-code development, data engineering, and enterprise integration. We assist mid-market and large organizations in transforming their operations by utilizing platforms such as Workato, Caspio, BMC Control-M, and C
Highlights
$10,000+
Min Project Size
$150+/hr
Avg Hourly Rate
50-249
Employees
New York, New York, Us
Services Provided+1 Services
23% API Development & Integration
10% Legacy System Modernization
17% AI Strategy & Roadmap Consulting
17% Custom AI Chatbot Development
AI Summary
“Zertain is an IT consulting firm specializing in hyperautomation, low-code development, and enterprise integration, delivering scalable solutions across industries like finance, healthcare, and supply chain.”
Railay
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Railay supports rapidly expanding companies in overcoming the challenges of quickly and affordably accessing software development talent, all while ensuring a strong integration with the existing team and alignment with strategic goals. We assist our clients in meeting their "scale-up" talent needs
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
London, England, Gb
Services Provided+2 Services
50% IT Staff Augmentation
10% Legacy System Modernization
10% Mobile App Development (iOS & Android)
8% E-Commerce Development
AI Summary
“Railay enables rapidly growing companies to augment agile development teams in Vietnam with skilled software talent, offering scalable, cost-effective solutions aligned to strategic objectives.”
PLAN A
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At Plan A, we are a group of experts with over 16 years of experience in enterprise software development and project management, focusing on delivering sophisticated IT solutions and products. Our clients gain not only from our engineering skills but also from our expertise and thorough grasp of bus
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Sofia, Sofia, Bg
Services Provided+2 Services
10% Legacy System Modernization
8% Frontend Development
10% Mobile App Development (iOS & Android)
12% Backend Development
AI Summary
“PLAN A delivers expert enterprise software development and project management services, employing advanced technologies and agile teams to create tailored, efficient IT solutions across diverse business needs.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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