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

Sette Technology Solutions
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At Sette Technology Solutions, we view technology as a vital means to create new opportunities. Our approach goes beyond software development; we collaborate with our clients to grasp their unique needs and challenges. By utilizing our knowledge in web and mobile development, as well as various tech
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
45% Custom Web Application Development
45% Mobile App Development (iOS & Android)
10% Legacy System Modernization
AI Summary
“Sette Technology Solutions delivers tailored web and mobile development services, leveraging diverse technology stacks to address client challenges and drive business growth through collaborative innovation.”
Software Planet Group
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Software Planet Group (SPG) is a comprehensive software solutions provider with nearly 20 years of experience in customizing and creating applications for various businesses, from start-ups to multinational corporations, across diverse industries in the USA and Europe. SPG offers an end-to-end softw
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Cherkasy, Ua
Services Provided+2 Services
30% Custom Web Application Development
20% Mobile App Development (iOS & Android)
20% API Development & Integration
10% SaaS Product Development
AI Summary
“Software Planet Group delivers comprehensive, end-to-end software development solutions, leveraging nearly 20 years of expertise to serve diverse industries across the USA and Europe.”
Medullus Systems
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We develop cost-effective, customized software for businesses of all sizes. By leveraging contemporary design principles alongside the newest cloud, mobile, and desktop technologies, we craft personalized solutions that enhance collaboration among employees, link businesses with their clients, strea
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Morrisville, North Carolina, Us
Services Provided+3 Services
30% Software Development Services
20% Mobile App Development (iOS & Android)
15% Legacy System Modernization
10% Machine Learning Model Development
AI Summary
“Medullus Systems specializes in delivering customized, cost-effective software solutions using modern cloud, mobile, and desktop technologies to enhance collaboration, client engagement, and operational efficiency.”
Samtech Innovations Pvt Ltd
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### ABOUT US We offer IT and business solutions that prioritize problem-solving and fulfilling needs over mere sales. Our initiatives and service delivery focus on either generating savings or creating revenue for our clients while alleviating their challenges. At Samtech, we emphasize strong accou
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
New Delhi, Delhi, In
Services Provided
14% Legacy System Modernization
20% Mobile App Development (iOS & Android)
33% Pay Per Click
33% IT Staff Augmentation
AI Summary
“Samtech Innovations Pvt Ltd delivers tailored IT and business solutions focused on client partnerships, quality, and innovation to optimize technology, enhance efficiency, and support business growth.”
DreamDev Solutions
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DreamDev Solutions is a dedicated team of WordPress engineers specializing in challenging, high-stakes projects and enduring partnerships with agencies. We assist agencies and product teams in stabilizing, scaling, and optimizing demanding WordPress platforms. Our primary skills include custom theme
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Kharkiv, Kharkiv, Ua
Services Provided+4 Services
23% Custom Web Application Development
10% E-Commerce Development
7% QA & Software Testing
10% Legacy System Modernization
AI Summary
“DreamDev Solutions specializes in complex WordPress development, offering custom themes, migrations, performance optimization, and reliable agency partnerships with seamless integration and long-term support.”
OpenTurf Technologies
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Are you struggling to scale your technology operations? Do you have business or technical needs but lack the capacity to implement them? Are numerous tech projects consuming your time, preventing you from focusing on your core business? Reach out to us. We function as a Virtual Technology Office (VT
Highlights
$25,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Bengaluru, Karnataka, In
Services Provided+7 Services
20% Software Development Services
10% Machine Learning Model Development
10% Legacy System Modernization
10% IT Staff Augmentation
AI Summary
“OpenTurf Technologies offers comprehensive technology solutions, including consulting, custom software, and advanced tech expertise, acting as a virtual CTO to enhance diverse industry operations globally.”
Miquido
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Miquido is a mobile platform partner for enterprise service companies, focusing on creating and expanding mobile ecosystems as key revenue sources. Rather than just conventional software development, Miquido takes complete responsibility for the entire product lifecycle—covering customer experience,
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Krakow, Lesser Poland, Pl
Services Provided+3 Services
35% Mobile App Development (iOS & Android)
8% Custom Web Application Development
8% Legacy System Modernization
12% AI Strategy & Roadmap Consulting
AI Summary
“Miquido partners with enterprises to develop and maintain secure, efficient mobile platforms, enhancing user experience and modernizing legacy systems across healthcare, travel, and more.”
Paperfrogs
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Paperfrogs is a technology studio centered on research that aims to create tools, systems, and platforms across various fields. Our goal is to address real-world challenges through curiosity, experimentation, and a commitment to long-term solutions. We engage in applied research, develop experimenta
Highlights
2-9
Employees
Services Provided+2 Services
35% Custom Web Application Development
15% Legacy System Modernization
13% AI Strategy & Roadmap Consulting
15% AI Agent & Multi-Agent System Development
AI Summary
“Paperfrogs is a technology studio dedicated to applied research and developing innovative tools and platforms that solve real-world problems through methodical experimentation and long-term solutions.”
Innopad Technologies Group
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At Innopad Technologies Group, we function as a product-focused engineering consultancy, collaborating with startups, growing companies, and enterprise teams to create and enhance essential digital platforms. With over 15 years of leadership experience and a team of more than 40 engineers, designers
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Parsippany-Troy Hills, New Jersey, Us
Services Provided+3 Services
20% Custom Web Application Development
13% Mobile App Development (iOS & Android)
5% E-Commerce Development
13% Legacy System Modernization
AI Summary
“Innopad Technologies Group delivers product-focused engineering consultancy with scalable SaaS, mobile apps, AI, and cloud solutions, emphasizing structured execution and long-term digital platform growth.”
AOByte
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AOByte focuses on extensive software development. Since our inception, we have emphasized delivering value to our clients and supporting their digital transformation journeys. Our expertise encompasses a wide range of services, particularly in software development for the healthcare, insurance, and
Highlights
10-49
Employees
Yerevan, Am
Services Provided
20% Mobile App Development (iOS & Android)
10% Legacy System Modernization
20% Custom Web Application Development
50% IT Staff Augmentation
AI Summary
“AOByte specializes in comprehensive software development, delivering high-quality, timely solutions across healthcare, insurance, and fintech sectors to support digital transformation initiatives.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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