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

Tonic
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Tonic is a premier technology service provider that excels in crafting enhanced digital experiences for organizations seeking a reliable technology partner to support their objectives. Tonic aims to deliver measurable results for its clients through its strategy, design, and development services. It
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Denver, Colorado, Us
Services Provided+3 Services
18% Web App UI Design
10% Wireframing & Prototyping
15% Product UX Strategy
7% UX Research & Usability Testing
AI Summary
“Tonic is a trusted technology partner specializing in strategy, UI/UX design, and software development to deliver modernized digital experiences and enterprise applications worldwide.”
Eteksol
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Eteksol is a product engineering company that prioritizes AI, assisting startups and growth-stage businesses in developing intelligent software more quickly. With over 18 years of expertise and a Top Rated Plus reputation on Upwork, we focus on creating AI-powered platforms, minimum viable products
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Lahore, Pk Punjab, Pk
Services Provided+8 Services
25% Custom Web Application Development
10% ERP & CRM Development
15% Legacy System Modernization
8% Custom AI Chatbot Development
AI Summary
“Eteksol is a product engineering firm specializing in AI-driven software, offering agile development, custom platforms, and scalable teams for startups and enterprises across various industries.”
Pragava LLC
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Pragava empowers our clients to harness the capabilities of AI in various areas, including Natural Language Processing, Computer Vision, and Analytics. We specialize in developing tailored models for applications in speech, dialogue, financial services like insurance and payments, among others. We m
Highlights
$50-99/hr
Avg Hourly Rate
50-249
Employees
Pune, Maharashtra, In
Services Provided+1 Services
20% Machine Learning Model Development
20% Cloud Consulting & SI
20% Legacy System Modernization
20% Other IT Consulting and SI
AI Summary
“Pragava LLC specializes in AI-driven solutions, including NLP, computer vision, and analytics, delivering end-to-end model development and product expertise across diverse industries like finance and technology.”
Volano Software
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Hi there! We're Volano, a company that creates tailored software to enhance business operations, conserve time and resources, and boost employee satisfaction. We enjoy collaborating with our clients to simplify their business challenges and streamline workflows.
Highlights
10-49
Employees
Omaha, Nebraska, Us
Services Provided+1 Services
20% Other IT Consulting and SI
20% Software Development Services
20% Legacy System Modernization
20% Mobile App Development (iOS & Android)
AI Summary
“Volano Software specializes in developing customized software solutions that streamline business operations, optimize resources, and improve employee satisfaction through collaborative client partnerships.”
NVT
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NVT is a software development firm based in Poland, renowned for its vast experience in both the maintenance and development of complex, technologically sophisticated IT/ICT projects. We provide custom software solutions that are meticulously crafted, consistently updated, and aligned with the lates
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Warszawa, Masovian, Pl
Services Provided+3 Services
20% Custom Web Application Development
8% Mobile App Development (iOS & Android)
5% E-Commerce Development
17% Legacy System Modernization
AI Summary
“NVT is a Polish software development firm specializing in custom solutions with extensive expertise in complex IT projects, utilizing modern technologies to support diverse clients throughout software production and implementation.”
Reiz Tech
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Reiz Tech is a worldwide IT services collaborator that assists enterprises and public organizations in updating outdated systems, developing scalable digital solutions, and achieving quantifiable business results. Boasting over 20 years of experience and more than 100 successful projects, we serve c
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Vilnius, Lt
Services Provided
38% Custom Web Application Development
12% Legacy System Modernization
20% Robotic Process Automation (RPA)
30% Other IT Consulting and SI
AI Summary
“Reiz Tech delivers versatile IT services globally, specializing in software development, consulting, and digital transformation across regulated industries, ensuring innovative, scalable solutions with proven business impact.”
CSHARK
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Our dedication to your success extends beyond just technology and software development. Through our consulting and product design services, CSHARK takes a comprehensive approach to tackle your business challenges and facilitate digital transformation. **SERVICES WE OFFER** From application devel
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
250-999
Employees
Wroclaw, Lower Silesian, Pl
Services Provided
38% Custom Web Application Development
12% Legacy System Modernization
30% Product UX Strategy
20% UX Research & Usability Testing
AI Summary
“CSHARK delivers comprehensive digital transformation through custom software, UX/UI design, cloud services, and R&D, specializing in scalable solutions for mid-to-large international clients across finance and manufacturing.”
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Lancelotmobile
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Lancelotmobile is a global team of experts collaborating with clients from various countries, including the USA, Germany, the UK, Switzerland, and Belgium. We develop comprehensive solutions in close partnership with our clients. The quality of the end product is important to us, so we utilize the m
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% Legacy System Modernization
10% QA & Software Testing
AI Summary
“Lancelotmobile is a global expert team delivering bespoke software solutions and maintaining legacy systems, collaborating closely with clients across multiple countries to ensure quality and innovation.”
Joblinking
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We focus on linking businesses with elite IT experts from around the globe. Our goal is to deliver flexible, effective, and budget-friendly staffing options tailored to the specific requirements of each project. Through a thorough selection process and a dedication to quality, we guarantee that our
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ridgewood, New Jersey, Us
Services Provided
25% Custom Web Application Development
15% Legacy System Modernization
10% CMS Development & Customization
50% IT Staff Augmentation
AI Summary
“Joblinking connects businesses with top global IT professionals, offering tailored, flexible, and cost-effective staffing solutions including developers, designers, and consultants to drive innovation and success.”
LANhome TECHnologies
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Since 2002, LANhome TECHnologies has been reliably serving the Minneapolis/St. Paul Metro area by providing computer network consulting and support. We specialize in managed services, cloud computing, and mobile solutions. By leveraging cloud-based IT infrastructure and service options, we offer cos
Highlights
$50-99/hr
Avg Hourly Rate
10-49
Employees
Minneapolis, Minnesota, Us
Services Provided
20% Mobile App Development (iOS & Android)
14% Legacy System Modernization
33% Cloud Consulting & SI
33% Managed IT Services
AI Summary
“Since 2002, LANhome TECHnologies delivers managed IT services, cloud computing, and mobile solutions in Minneapolis, providing cost-effective, reliable technology support tailored for small businesses.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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