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

stepin solutions
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We are a technology solutions provider specializing in web and mobile app development. Our expertise includes PHP software development, Symfony development, agile solutions, and enterprise application development.
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+11 Services
15% Custom Web Application Development
13% Mobile App Development (iOS & Android)
3% ERP & CRM Development
1% Legacy System Modernization
AI Summary
“Stepin Solutions is an Indian technology provider specializing in web and mobile app development, custom software, UI/UX design, and enterprise consulting for CRM, ERP, and automation systems.”
Gravity Code S.L.
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Our goal is to assist businesses in creating essential, high-performance, and scalable software solutions by utilizing the latest technologies. We view software development as a form of creative art, which is why we prioritize design and user experience. For over a decade, we have partnered with a v
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+18 Services
6% Frontend Development
5% Custom Web Application Development
3% Mobile App Development (iOS & Android)
5% Backend Development
AI Summary
“Gravity Code S.L. delivers high-performance, scalable software solutions with a focus on design and user experience, collaborating across industries to build robust, responsive web applications.”
Altnetix
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Altnetix is a software development and IT services firm that offers assistance to any organization in need. Our team collaborates closely with your business to ensure that your software remains current and performs optimally for the best outcomes. We specialize in web and app development, troublesho
Highlights
$1,000+
Min Project Size
2-9
Employees
Marietta, Georgia, Us
Services Provided+6 Services
13% Custom Web Application Development
12% Mobile App Development (iOS & Android)
5% E-Commerce Development
3% Legacy System Modernization
AI Summary
“Altnetix is a software development and IT services company delivering web and app solutions, troubleshooting, and comprehensive support to ensure optimal software performance across diverse industries.”
Evolfinity Technologies Private Limited
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Evolfinity is a value-focused offshore software development firm with a significant global presence and a diverse client base. We boast a dedicated team committed to providing innovative solutions for businesses, enterprises, mid-sized organizations, and startups around the world. Our close-knit fam
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Bengaluru, Karnataka, In
Services Provided+9 Services
8% Mobile App Development (iOS & Android)
4% Legacy System Modernization
5% E-Commerce Development
3% QA & Software Testing
AI Summary
“Evolfinity Technologies is a global offshore software development firm delivering innovative digital solutions to diverse clients, leveraging a dedicated team and over a decade of industry expertise.”
Mobile App Experts
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Mobile App Experts is a mobile app development company located in the UK. We focus on creating apps for iOS, Android, and cross-platform environments. Our team consists of highly skilled mobile app developers who deliver comprehensive design and development services for iPhone, iPad, and Android app
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+5 Services
50% Mobile App Development (iOS & Android)
10% Custom Web Application Development
5% E-Commerce Development
3% Legacy System Modernization
AI Summary
“Mobile App Experts is a UK-based company specializing in iOS, Android, and cross-platform mobile app development, offering skilled developers and comprehensive design services globally.”
NoBrain Studio
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NoBrain Studios specializes in creating and developing custom serious games and immersive training experiences for businesses, educational institutions, and training organizations. We assist our clients in converting complex information into interactive, engaging, and effective learning experiences
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+3 Services
23% Custom Web Application Development
23% Mobile App Development (iOS & Android)
5% Legacy System Modernization
15% Product UX Strategy
AI Summary
“NoBrain Studio develops customized serious games and immersive training solutions, combining instructional design and advanced technology to enhance learning, engagement, and measurable outcomes across diverse platforms.”
Abaxsoft Solutions Pvt Ltd
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Abaxsoft Solutions, a mobile app development firm based in India, is leading businesses into a new era of expansion. Recognized as one of India’s top software development companies, we have achieved remarkable progress in a short span of time. From websites and eCommerce platforms to local delivery
Highlights
10-49
Employees
Indore, Madhya Pradesh, In
Services Provided+8 Services
10% Custom Web Application Development
7% E-Commerce Development
13% Mobile App Development (iOS & Android)
3% Legacy System Modernization
AI Summary
“Abaxsoft Solutions Pvt Ltd, a leading Indian software developer, delivers diverse high-quality digital products including mobile apps and eCommerce platforms to address global business challenges efficiently.”
AppsigFun
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AppsingFun is an information technology startup based in Bangladesh. We take pleasure in our work at AppsingFun and are proud to offer a variety of services, including IT resource augmentation (providing a vetted talent pool for both onshore and offshore team support), outsourcing, custom software d
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+6 Services
5% Legacy System Modernization
5% E-Commerce Development
17% Custom Web Application Development
7% QA & Software Testing
AI Summary
“AppsingFun is a Bangladesh-based IT startup offering diverse services including software development, IT resource augmentation, AI agent development, quality assurance, outsourcing, and cloud migration.”
Titani Global Solutions
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Titani Solutions, part of Titan Technology, offers more than 11 years of experience in outsourced software development. We specialize in delivering tailored solutions that meet the unique requirements of each client, enabling them to reach their objectives effectively and accurately.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
250-999
Employees
Services Provided+4 Services
23% Custom Web Application Development
7% QA & Software Testing
3% Legacy System Modernization
20% IT Staff Augmentation
AI Summary
“Titani Global Solutions leverages over 11 years in outsourced software development to deliver customized solutions that effectively address diverse client needs and objectives.”
Technova Design
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1. **Cutting-Edge Digital Solutions** We are a modern IT design studio focused on developing user-friendly digital products. From mobile applications to large-scale enterprise systems, we provide creative designs that address real-life challenges. 2. **Diverse Expertise** Our team merges skills
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+5 Services
20% Frontend Development
4% Legacy System Modernization
10% CMS Development & Customization
8% Product UX Strategy
AI Summary
“Technova Design is a modern IT studio specializing in user-friendly digital products, integrating design and technology to deliver innovative, client-focused solutions that drive business growth.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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