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

Innovative Widget
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We offer a comprehensive range of cutting-edge digital solutions designed to enhance your business's online visibility and draw in customers. Our dedication lies in collaborating closely with you to develop the most innovative and budget-friendly digital solutions tailored to your needs.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+7 Services
8% E-Commerce Development
10% Custom Web Application Development
7% Mobile App Development (iOS & Android)
5% API Development & Integration
AI Summary
“Innovative Widget delivers advanced, cost-effective digital solutions to boost business online presence and customer engagement through collaborative, tailored strategies.”
Devopixel
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With more than 20 years of experience at the crossroads of business strategy and advanced technology, he has become a reliable Digital Product Architect for numerous global companies. He has a unique talent for connecting high-level business objectives with the complex technical aspects necessary to
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
Services Provided+2 Services
14% Custom Web Application Development
5% E-Commerce Development
12% Mobile App Development (iOS & Android)
3% Legacy System Modernization
AI Summary
“Devopixel leverages over 20 years of expertise in integrating business strategy with advanced technology to architect effective digital products for global enterprises.”
ISolutions Force LLC
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ISolutions Force (ISF) serves as your comprehensive technology partner, focused on aiding businesses in automating, expanding, and ensuring secure growth. We provide a range of services, from AI and custom software development to systems integration, managed IT support, and technology enablement for
Highlights
$1,000+
Min Project Size
2-9
Employees
Services Provided+13 Services
4% Legacy System Modernization
5% E-Commerce Development
11% Custom Web Application Development
3% Workflow Automation (Zapier / Make / n8n)
AI Summary
“ISolutions Force LLC offers tailored technology services including AI, software development, systems integration, IT management, and cybersecurity to enable secure business growth and efficiency.”
ZesSaule infotech
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ZesSauleinfotech is a comprehensive software development firm that specializes in eCommerce, web, and mobile app development. We are committed to technological empowerment and offer complete tech solutions to create a strong digital presence.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
18% Custom Web Application Development
15% Mobile App Development (iOS & Android)
15% E-Commerce Development
2% Legacy System Modernization
AI Summary
“ZesSauleinfotech is a software development firm specializing in eCommerce, web, and mobile app solutions, delivering comprehensive technology services to enhance digital presence and empowerment.”
Seganiko
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Seganiko crée et développe des sites web ainsi que des boutiques en ligne pour les TPE/PME et les associations en France et au Luxembourg. En tant qu'experts de WordPress et WooCommerce, nous proposons des solutions sur mesure (thèmes/plugins), des migrations, et une intégration continue/de déploiem
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Algrange, Grand Est, Fr
Services Provided+3 Services
20% Custom Web Application Development
12% E-Commerce Development
2% Legacy System Modernization
20% Product UX Strategy
AI Summary
“Seganiko designs and develops customized websites and online stores for SMEs and associations in France and Luxembourg, specializing in WordPress/WooCommerce, SEO, e-commerce, CRM integration, and compliance.”
Insticc Digital Solutions
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Insticc Digital comprises a diverse team of innovative entrepreneurs from around the world, boasting extensive business intelligence and exceptional technical expertise. Our collective effort is aimed at addressing intricate enterprise issues by providing solutions tailored to customer needs.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Johannesburg, Gauteng, Za
Services Provided+14 Services
5% AI Strategy & Roadmap Consulting
4% Workflow Automation (Zapier / Make / n8n)
4% Machine Learning Model Development
3% IT Staff Augmentation
AI Summary
“Insticc Digital Solutions is a global team of expert entrepreneurs delivering customized business intelligence and technical solutions to effectively solve complex enterprise challenges.”
InfiniteSoft
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We are a global outsourcing firm based in Kiev, Ukraine, focusing on the development of web and mobile applications. Our experience includes creating numerous intricate and essential applications. We involve people in the projects we undertake. Our enthusiasm for digital business transcends mere aes
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Kyiv, Ua
Services Provided+14 Services
13% Custom Web Application Development
10% Mobile App Development (iOS & Android)
5% E-Commerce Development
3% Legacy System Modernization
AI Summary
“InfiniteSoft is a Kiev-based global outsourcing firm specializing in web and mobile app development, strategic digital design, and innovative platforms that drive market success and cultural relevance.”
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Agentcy
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Here’s a refined and SEO-optimized business profile for Agentcy.co.za: **Agentcy | AI & Automation Agency | South Africa** Agentcy (agentcy.co.za) is a premier AI and automation agency based in South Africa, dedicated to helping businesses optimize their operations, cut costs, and scale efficient
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+9 Services
15% Software Development Services
10% AI Agent & Multi-Agent System Development
10% AI Strategy & Roadmap Consulting
10% Machine Learning Model Development
AI Summary
“Agentcy is a South African AI and automation agency specializing in customized technology solutions that optimize business operations, enhance efficiency, and support scalable growth across diverse industries.”
Appmakery
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AppMakery is a startup mobile app development firm that supports tech companies through all stages, from initial ideas to post-revenue growth. Our team comprises experienced programmers, designers, product managers, UI and UX experts, and strategy consultants, all bringing a blend of startup and cor
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+11 Services
3% Legacy System Modernization
6% Custom Web Application Development
4% E-Commerce Development
13% Mobile App Development (iOS & Android)
AI Summary
“AppMakery is a startup-focused mobile app development firm offering end-to-end solutions, including programming, design, product management, and SEO services tailored for tech companies and startups.”
Emperia Suite
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Emperia Suite goes beyond being a mere ERP; it serves as a strategic tool for shaping a future marked by flexibility, insight, and sustainable growth. Tailored for innovative leaders in production, logistics, and finance, Emperia Suite simplifies complexity, enabling you to gain mastery over your or
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+4 Services
13% API Development & Integration
11% ERP & CRM Development
1% Legacy System Modernization
13% AI Strategy & Roadmap Consulting
AI Summary
“Emperia Suite is a flexible, modular ERP platform supporting production, logistics, and finance with customizable workflows, real-time analytics, AI insights, and global expert support for sustainable growth.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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