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

Elantratech
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Elantratech offers B2B solutions, customized development, consulting, and next-generation technology services to clients worldwide. We support our customers in their digital transformation across various sectors, including big data, machine learning, mobility, automation, cloud computing, mobile com
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Cambridge, England, Gb
Services Provided+14 Services
7% Custom Web Application Development
6% Mobile App Development (iOS & Android)
2% E-Commerce Development
4% CMS Development & Customization
AI Summary
“Elantratech delivers tailored B2B digital transformation solutions, offering web, app, and CMS development alongside advanced technologies across diverse industries globally.”
BX3 Interactive
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BX3 Interactive is a digital marketing and web development firm based in the Phoenix region. We specialize in creating and developing innovative marketing strategies, automation, and digital product solutions.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Glendale, California, Us
Services Provided+8 Services
17% Custom Web Application Development
7% E-Commerce Development
7% Mobile App Development (iOS & Android)
4% Legacy System Modernization
AI Summary
“BX3 Interactive, based in Phoenix, specializes in digital marketing, web development, innovative marketing strategies, automation, and digital product solutions to enhance client engagement.”
KeepCodeIn
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Keepcodein shines as a leader in IT recruitment, effectively linking innovative tech firms with outstanding talent. Our strategic vision goes beyond conventional methods, as we thoroughly understand the specific needs of clients and candidates to ensure a perfect match in skills, values, and culture
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lahore, Pk Punjab, Pk
Services Provided+5 Services
8% API Development & Integration
12% Custom Web Application Development
10% E-Commerce Development
3% Legacy System Modernization
AI Summary
“KeepCodeIn excels in IT recruitment, connecting tech firms with top talent through strategic, tailored approaches that align skills and culture, fostering lasting professional partnerships.”
Mechcubei Solutions
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Mechcubei is an expanding software development firm based in India and the USA. Our primary objective is to provide top-notch software development services at competitive prices to our clients. We aim to not only meet but surpass our clients' expectations by delivering outstanding service in line wi
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
St. Louis, Missouri, Us
Services Provided+12 Services
8% Mobile App Development (iOS & Android)
3% Backend Development
3% Frontend Development
2% CMS Development & Customization
AI Summary
“Mechcubei Solutions is a growing India-USA software development firm delivering diverse, high-quality, client-focused services with 24/7 support, ensuring timely, trend-aligned solutions across domains.”
Devputers
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Devputers.com is a self-funded startup staffed by several engineers. Their phrase for their software development efforts is "We build backends." The team specializes in designing, developing, and deploying backend systems, APIs, and distributed systems on both on-premises hardware and virtual machin
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
9% API Development & Integration
5% Legacy System Modernization
11% Backend Development
25% Cloud Consulting & SI
AI Summary
“Devputers is a self-funded startup specializing in backend development, cloud infrastructure, AI integration, and business consulting, delivering scalable, efficient solutions and digital transformation services.”
UIZ GmbH
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UIZ provides a range of services in Geoinformatics, Water Management, Research and Development, IT Outsourcing, Virtual Staffing, HR Solutions, and Business Development. We have been supporting clients worldwide across various time zones.
Highlights
$25,000+
Min Project Size
< $25/hr
Avg Hourly Rate
Berlin, Berlin, De
Services Provided+15 Services
10% Mobile App Development (iOS & Android)
7% Legacy System Modernization
2% Social Media Marketing
2% Pay Per Click
AI Summary
“UIZ GmbH offers comprehensive services in geoinformatics, water management, IT outsourcing, virtual staffing, HR solutions, and business development, supporting clients globally across multiple time zones.”
Shakham Inc.
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Shakham Inc. is a consulting firm focused on AI and digital transformation, assisting startups, small and medium-sized enterprises, and large corporations in enhancing their operational efficiency and scaling their operations. We excel in AI automation, custom software development, workflow automati
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
13% Machine Learning Model Development
10% Workflow Automation (Zapier / Make / n8n)
3% AI Strategy & Roadmap Consulting
17% Custom Web Application Development
AI Summary
“Shakham Inc. is a consulting firm specializing in AI-driven automation, software development, and digital transformation for diverse sectors, enhancing operational efficiency and decision-making.”
K3-Team Pty Ltd
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At K3-Team, we specialize in implementing, customizing, and supporting Odoo ERP and CRM systems for businesses in Perth and throughout Australia. Our goal is to provide smart, scalable IT solutions that automate business processes, enhance operational efficiency, and improve customer experiences. Wi
Highlights
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+4 Services
25% CRM Consulting and SI
20% ERP Consulting and SI
3% Cloud Consulting & SI
3% Other IT Consulting and SI
AI Summary
“K3-Team Pty Ltd. offers tailored Odoo ERP and CRM solutions across Australia, enhancing business automation, integrating e-commerce, and providing comprehensive digital transformation services for diverse industries.”
M
MIS EXPERT INDIA
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MIS Expert is a consulting firm that offers specialized services primarily in the BFSI, e-commerce, and transportation sectors in the US and India. Our innovative products have greatly benefited clients by enhancing IT governance and monitoring various statuses. Our Customized Document Management Sy
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Mumbai, Maharashtra, In
Services Provided+4 Services
5% Mobile App Development (iOS & Android)
5% Legacy System Modernization
13% API Development & Integration
12% Backend Development
AI Summary
“MIS Expert India specializes in IT consulting and custom software solutions for BFSI, e-commerce, and transportation sectors, leveraging modern technologies and cloud platforms to enhance client business outcomes.”
yl.tech
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Our team consists of experienced engineers who focus on React and .NET, providing customized, high-performance, and scalable solutions to enhance business success.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Lviv, Lviv, Ua
Services Provided+4 Services
3% Legacy System Modernization
7% Backend Development
9% Frontend Development
4% Custom Web Application Development
AI Summary
“yl.tech specializes in delivering customized, high-performance React and .NET solutions, leveraging experienced engineers to create scalable software that drives business success.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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