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

Trimplement GmbH
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For more than ten years, we have developed payment solutions, e-wallets, and virtual account management software that serve as essential financial tools for prominent companies in global markets. Our skilled software engineers, project managers, and solution architects design software that adheres t
Highlights
10-49
Employees
Cologne, North Rhine Westphalia, De
Services Provided
40% Custom Web Application Development
10% E-Commerce Development
20% Legacy System Modernization
30% Blockchain & Web3 Development
AI Summary
“Trimplement GmbH develops secure payment solutions, e-wallets, and virtual account management software, delivering high-quality financial technology services to prominent global companies for over ten years.”
Bytebrand Outsourcing AG
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ABOUT US: We are passionate about offshoring but dislike when clients receive subpar products due to ineffective communication or inadequate developers. Our goal is to connect businesses with offshore developers seamlessly. We oversee small to medium IT projects to ensure companies receive high-qual
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Lviv, Lviv, Ua
Services Provided
40% Custom Web Application Development
35% Mobile App Development (iOS & Android)
15% Legacy System Modernization
10% QA & Software Testing
AI Summary
“Bytebrand Outsourcing AG specializes in overseeing small to medium IT projects, ensuring high-quality offshore development through effective communication and a blend of advanced technology and cultural understanding.”
Codurance Ltd
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Codurance is an international software consulting firm dedicated to assisting businesses in developing sustainable technical capabilities that foster growth and innovation. They take a comprehensive approach to ensure alignment between business and technical strategies, covering areas such as techni
Highlights
50-249
Employees
London, England, Gb
Services Provided
20% Legacy System Modernization
30% Custom Web Application Development
28% IT Staff Augmentation
22% Cloud Consulting & SI
AI Summary
“Codurance Ltd. is a global software consultancy enhancing businesses' technical capabilities through Agile, Lean, and DevOps practices, delivering secure, adaptable, and cost-effective software solutions.”
Next Solutions
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Next Solutions was created with the goal of fostering positive change and innovation in response to the evolving landscape of business technology. We aim to assist our clients in adapting to these changes by utilizing our over 10 years of expertise in human capital management and software technology
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Sofia, Sofia, Bg
Services Provided
50% Managed IT Services
35% Custom Web Application Development
15% Legacy System Modernization
AI Summary
“Next Solutions leverages over a decade of expertise in human capital management and software technology, delivering comprehensive HCM and managed services to support client innovation and growth.”
Strata Research
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Strata Research is a cutting-edge software firm that focuses on providing comprehensive solutions for both new software development and modernizing legacy systems. We collaborate with discerning clients seeking dependable, secure, and well-crafted software, and who anticipate a thorough approach. Ou
Highlights
$250,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Kitchener, Ontario, Ca
Services Provided+1 Services
15% Custom Web Application Development
20% Legacy System Modernization
10% Backend Development
5% Frontend Development
AI Summary
“Strata Research specializes in developing and modernizing software, delivering dependable and secure solutions tailored to clients seeking comprehensive and high-quality technology services.”
Tesseract TechnoLabs
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Elevate your software development with the newest innovations in Python at Tesseract Technolabs. We focus on creating strong, scalable, and efficient solutions that cater to your business requirements. Whether it's automation or AI-driven applications, we keep your technology at the forefront. At
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+4 Services
23% API Development & Integration
10% E-Commerce Development
18% Legacy System Modernization
15% AI Strategy & Roadmap Consulting
AI Summary
“Tesseract TechnoLabs delivers innovative, scalable AI and Python-based software solutions tailored to diverse industries, specializing in automation, deep learning, and natural language processing to drive business success.”
JAM-IT BPM Consultants
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JAM-IT BPM Consultants is a technology consulting company focused on low-code solutions, automating business processes, and updating legacy systems for government and large enterprise clients. Our team, comprised of industry professionals with years of expertise, assists organizations in optimizing
Highlights
$50,000+
Min Project Size
2-9
Employees
Evanston, Illinois, Us
Services Provided+1 Services
13% Custom Web Application Development
15% API Development & Integration
22% Legacy System Modernization
30% AI Strategy & Roadmap Consulting
AI Summary
“JAM-IT BPM Consultants specializes in low-code technology, automating business processes, and modernizing legacy systems for government and enterprises, delivering tailored, secure, and scalable digital solutions.”
Ambitious Solutions
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We are a software development firm based in Skopje, North Macedonia, specializing in creating customized enterprise software solutions to digitize and automate your business operations. We also focus on enhancing and modernizing legacy systems, providing staff augmentation, and assembling dedicated
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Skopje, Skopje, Mk
Services Provided+1 Services
20% Custom Web Application Development
18% Legacy System Modernization
7% Backend Development
5% Frontend Development
AI Summary
“Ambitious Solutions is a Skopje-based software development firm specializing in customized enterprise solutions, legacy system modernization, staff augmentation, and dedicated team assembly to optimize business operations.”
Alver Services
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Alver Services is a specialized software company committed to delivering high-quality IT solutions that enhance data representation, processes, and communication. This leads to improved efficiency, reduced costs, and more effective data processing. We develop tailored applications that integrate wit
Highlights
$50-99/hr
Avg Hourly Rate
10-49
Employees
Gosport, England, Gb
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% Legacy System Modernization
15% QA & Software Testing
AI Summary
“Alver Services delivers customized IT solutions enhancing data processing, system integration, and efficiency, with ongoing maintenance, agile development, and robust disaster recovery support.”
Valethi Technologies
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We assist organizations in eliminating process confusion and accelerating business results. Our support spans various industries, including distribution, manufacturing, consumer goods, and healthcare, aiding small to mid-sized as well as enterprise-level companies in enhancing process efficiency, ma
Highlights
$50,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
250-999
Employees
Nagpur, Maharashtra, In
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
15% E-Commerce Development
20% Legacy System Modernization
AI Summary
“Valethi Technologies enhances business efficiency and agility across industries by streamlining processes and enabling smarter decisions, serving small to enterprise-level organizations to improve competitiveness and customer experience.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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