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

Shawn DeWolfe Consulting
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With two decades of experience in web development, we have gained insights into what is required to achieve optimal design, messaging, and results for your online presence. Our approach involves utilizing a streamlined and carefully chosen set of technologies, such as PHP, JavaScript, and MySQL, to
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Saanichton, British Columbia, Ca
Services Provided+3 Services
28% Custom Web Application Development
5% Legacy System Modernization
23% Search Engine Optimization (SEO)
5% Digital Strategy
AI Summary
“Shawn DeWolfe Consulting crafts versatile, user-friendly websites using expert web development in PHP, JavaScript, and MySQL, delivering optimized, search-engine-friendly, and cross-device compatible solutions.”
ReviveSoft
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At ReviveSoft, we focus on upgrading and modernizing current software applications, bringing them into the future with advanced Cloud technologies.
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+8 Services
10% Custom Web Application Development
8% Mobile App Development (iOS & Android)
20% Legacy System Modernization
13% API Development & Integration
AI Summary
“ReviveSoft specializes in modernizing and upgrading legacy software by leveraging advanced Cloud technologies to enhance functionality, efficiency, and future readiness.”
RailsFactory
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RailsFactory is a prominent software development firm that focuses on full-stack web development, custom software solutions, and web application development utilizing technologies like Ruby on Rails, React, Python, .NET, Golang, Java, Node JS, Angular, and others. With over 19 years of experience an
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Melbourne, Victoria, Au
Services Provided+6 Services
5% Legacy System Modernization
4% Mobile App Development (iOS & Android)
3% E-Commerce Development
22% Custom Web Application Development
AI Summary
“RailsFactory is a software development firm specializing in full-stack solutions, app modernization, and staff augmentation across diverse technologies, serving businesses from startups to Fortune 500 companies.”
Axelsson Cloud Consulting Europe GmbH
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Axelsson Cloud Consulting is committed to helping clients achieve digital excellence, providing them with a competitive advantage through the strategic use of cloud-native products and services within the Microsoft Azure ecosystem. Our expertise covers a broad range of services, including data- and
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+10 Services
4% Robotic Process Automation (RPA)
5% Other IT Consulting and SI
3% IT Staff Augmentation
3% Custom AI Chatbot Development
AI Summary
“Axelsson Cloud Consulting Europe GmbH delivers strategic Microsoft Azure cloud-native solutions, including AI, automation, and modernization services, emphasizing quality, security, and sustainable digital transformation for business success.”
Roweb Development
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Roweb is a custom software development firm with over 20 years of experience assisting global clients in creating scalable digital products and high-performing development teams. We cater to everyone from startups to large corporations, focusing on long-term partnerships that enhance business growth
Highlights
50-249
Employees
Bucuresti, Bucuresti, Ro
Services Provided+3 Services
14% Custom Web Application Development
8% Mobile App Development (iOS & Android)
7% E-Commerce Development
5% Legacy System Modernization
AI Summary
“Roweb Development, part of Bulgaria's Sirma Group, specializes in custom software and digital solutions across industries, offering scalable, agile services including web, mobile, automation, and legacy modernization.”
Relevance Management
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Over the past 20 years, we have consistently embraced innovation while successfully completing numerous projects. Together with our partners, we develop adaptable, comprehensive solutions that can swiftly meet both present and future business demands. Our approach focuses on two key elements: 1. Lea
Highlights
$10,000+
Min Project Size
10-49
Employees
Bucuresti, Bucuresti, Ro
Services Provided
27% Custom Web Application Development
7% Legacy System Modernization
33% BI & Big Data Consulting & SI
33% Managed IT Services
AI Summary
“Relevance Management delivers innovative, multidisciplinary technology solutions across sectors, enhancing human processes and enabling businesses to adapt swiftly to evolving digital transformation challenges.”
Nugon
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Supported by a customer-centric, flexible, and innovative urban start-up environment, we are a company dedicated to Architecture, Design, and Technology, with extensive expertise across various sectors, including Banking, Finance, Telecom, Logistics, Retail, and Pharmaceuticals. Why choose us? IT so
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Milton Keynes, England, Gb
Services Provided
27% Custom Web Application Development
7% Legacy System Modernization
33% Managed IT Services
33% Other IT Consulting and SI
AI Summary
“Nugon specializes in innovative software architecture, delivering tailored IT solutions across diverse sectors to help businesses scale, optimize resources, and align technology with strategic goals.”
MSCI
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MSCI Inc. is a prominent provider of investment decision support tools for investors worldwide, such as asset managers, banks, hedge funds, and pension funds. Their offerings consist of indices, analytics for portfolio risk and performance, and governance solutions.
Highlights
$50-99/hr
Avg Hourly Rate
1000-9999
Employees
New York, New York, Us
Services Provided+4 Services
13% ERP Consulting and SI
12% CRM Consulting and SI
5% Unified Communications Consulting & SI
3% ECM Consulting and SI
AI Summary
“MSCI Inc. delivers comprehensive investment decision support tools, including indices, portfolio analytics, risk management, and governance solutions, serving global asset managers, banks, and institutional investors.”
Prodigma Solutions
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We assist development companies in growing by supplying them with agile software development teams that enhance their digital processes and accelerate the conversion of technology into value.
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Al
Services Provided+2 Services
30% Software Development Services
20% E-Commerce Development
20% Custom Web Application Development
15% Legacy System Modernization
AI Summary
“Prodigma Solutions specializes in Custom Web Application Development and E-Commerce Development, helping clients modernize legacy systems and build tailored software solutions. Their comprehensive development capabilities position them strongly within Software Development.”
Agilsys Software Labs Pvt. Ltd.
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Agilsys Software Labs was established to provide honest, efficient, reliable, and affordable software development services for businesses and individual clients worldwide. We are dedicated to empowering our clients by creating automation solutions tailored to their specific needs. Our approach is ch
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
35% Custom Web Application Development
8% Legacy System Modernization
8% Mobile App Development (iOS & Android)
13% CRM Consulting and SI
AI Summary
“Agilsys Software Labs specializes in custom software development and AI automation, delivering tailored, efficient solutions including web, mobile apps, CRM, and ERP integrations across industries.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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