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

We As Web
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About Us: We As Web is a global technology partner focused on AI-driven software engineering, enterprise platforms, and digital transformation. We assist executive teams in navigating complexities by providing flexible nearshore and onshore solutions that ensure full compliance and deliver measurabl
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
1000-9999
Employees
Cluj-Napoca, Cluj, Ro
Services Provided+9 Services
10% Custom Web Application Development
8% Mobile App Development (iOS & Android)
3% E-Commerce Development
5% Legacy System Modernization
AI Summary
“We As Web is a global technology partner specializing in AI-driven software engineering, enterprise platforms, and digital transformation, delivering compliant, innovative solutions for sustainable business growth.”
Perfomatix Solutions
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Perfomatix is a comprehensive engineering firm focused on AGILE product development. We collaborate with organizations throughout their innovation journey, from concept to launch and further. Acting as an outsourced innovation lab, we assist our clients in conducting controlled experiments using the
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Thiruvananthapuram, Kerala, In
Services Provided+14 Services
3% ERP & CRM Development
5% Frontend Development
5% Backend Development
6% Mobile App Development (iOS & Android)
AI Summary
“Perfomatix Solutions is an engineering firm specializing in Agile product development, offering services in full stack, mobile, IoT, machine learning, UX/UI design, cloud, and DevOps to accelerate innovation.”
AMAXZA
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Amaxza Digital excels in creating mobile applications, enterprise solutions, e-commerce platforms, and more. We specialize in the development, customization, integration, and launch of mobile apps, large-scale enterprise solutions, Internet of Things (IoT) systems, wearable technology, and blockchai
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Oyster Bay, New York, Us
Services Provided+10 Services
10% Mobile App Development (iOS & Android)
7% Custom Web Application Development
5% E-Commerce Development
5% API Development & Integration
AI Summary
“Amaxza Digital delivers innovative mobile and enterprise solutions, specializing in app development, IoT, blockchain, and emerging technologies, serving diverse clients with agile, customer-focused expertise.”
Webority Technologies
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Webority Technologies is a software engineering and AI firm that holds a CMMI Level 5 certification. We operate at the crossroads of technology consulting and engineering delivery, assisting enterprises, healthcare organizations, and government entities in creating solutions that address not only th
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Gurugram, Haryana, In
Services Provided+13 Services
5% Legacy System Modernization
8% Custom Web Application Development
4% Mobile App Development (iOS & Android)
17% Cloud Consulting & SI
AI Summary
“Webority Technologies is a CMMI Level 5 software and AI firm delivering technology consulting and engineering solutions tailored to enterprises, healthcare, and government, prioritizing deep business understanding.”
Cygnet Digital
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Since 2018, Cygnet Digital has been utilizing WordPress to help businesses grow and achieve results. Throughout this period, they have created websites for global brands and international charities. A distinctive feature of the agency is their use of GIT version control as the basis for all projects
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Gb
Services Provided+5 Services
40% E-Commerce Development
20% Custom Web Application Development
10% Software Development Services
5% AR/VR & Mixed Reality Services
AI Summary
“Cygnet Digital excels in Software Development, delivering tailored E-Commerce Development, custom web applications, and mobile app solutions. Their expertise in WordPress CMS and enterprise modernization positions them as a reliable partner for scalable digital products.”
gyrominds Technology Solutions
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Gyrominds is a privately owned 'boutique technology solutions' firm based in Bangalore, India. We focus on meeting the specialized needs of a select group of clients, working closely with them to address their distinctive and intricate business challenges while building trust. We prioritize long-ter
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Bengaluru, Karnataka, In
Services Provided+3 Services
3% E-Commerce Development
18% Custom Web Application Development
10% Mobile App Development (iOS & Android)
2% Legacy System Modernization
AI Summary
“Gyrominds Technology Solutions is a boutique firm in Bangalore specializing in flexible, customized technology services, delivering end-to-end solutions and fostering long-term client partnerships.”
Rocketdash
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Our experienced team, boasting over 15 years of expertise in providing scalable solutions and software, specializes in product design, software development, SaaS, startups, and MVPs. We prioritize efficiently delivering MVPs while avoiding the common pitfalls we've encountered in the past. The Rocke
Highlights
2-9
Employees
Tallinn, Harju, Ee
Services Provided+6 Services
5% Mobile App Development (iOS & Android)
7% Custom Web Application Development
8% Backend Development
5% Frontend Development
AI Summary
“Rocketdash delivers agile software development, UI/UX design, and digital strategy services, leveraging 15+ years of experience to create scalable, user-focused solutions for startups and enterprises.”
Hicron Software
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Hicron Software provides customized IT solutions designed to address your most challenging issues, from updating outdated systems to implementing AI-driven automation. With a strong emphasis on professionalism, progress, and collaboration, we assist organizations in scaling their operations, optimiz
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
250-999
Employees
Wroclaw, Lower Silesian, Pl
Services Provided+10 Services
12% Backend Development
17% Custom Web Application Development
5% Legacy System Modernization
5% Managed IT Services
AI Summary
“Hicron Software delivers customized IT solutions across sectors including PropTech, Automotive, and Insurance, focusing on scalable, transparent, and results-driven digital transformations globally.”
LEOCODE
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Who are we? We are a software development company dedicated to delivering high-quality, customized mobile and web solutions. In our projects, we prioritize offering strategic, advanced solutions and writing efficient code to create exceptional digital products that support our clients in expanding t
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Katowice, Silesian, Pl
Services Provided+6 Services
4% QA & Software Testing
1% Blockchain & Web3 Development
10% Mobile App Development (iOS & Android)
3% Legacy System Modernization
AI Summary
“LEOCODE is a software development firm delivering tailored mobile and web solutions using agile methods, leveraging a skilled team and broad expertise to drive client business growth.”
Publisto
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Publisto operates as a nimble backend software company on major international initiatives like QTales and Stories of Tomorrow. It also acts as a standalone global mobile developer for self-funded projects, including Story Chaser. Additionally, Publisto serves as an independent contractor or subcontr
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Athina, Attica, Gr
Services Provided+4 Services
14% Mobile App Development (iOS & Android)
12% Custom Web Application Development
5% Legacy System Modernization
3% QA & Software Testing
AI Summary
“Publisto is a versatile backend software and mobile development firm engaged in international projects and serving varied industries including shipping, telecommunications, retail, and hospitality.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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