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

SiteIT Solutions
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Unlock your business's true potential with SiteIT Solutions. We serve as your digital transformation ally, focusing on tailored application development that fosters growth and produces tangible results.
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Lakewood, Colorado, Us
Services Provided+6 Services
17% Custom Web Application Development
4% Legacy System Modernization
4% Mobile App Development (iOS & Android)
5% Wireframing & Prototyping
AI Summary
“SiteIT Solutions specializes in customized application development, acting as a digital transformation partner to help businesses achieve growth and measurable outcomes effectively.”
Zappify
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Zappify.in is a leading agency certified by Bubble, focusing on no-code and low-code app development. We design personalized, scalable, and user-friendly web and mobile applications to cater to a variety of client requirements. Our proficiency covers several platforms, guaranteeing creative solution
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
20% Custom Web Application Development
15% Mobile App Development (iOS & Android)
5% Backend Development
8% Frontend Development
AI Summary
“Zappify.in, a Bubble-certified agency, specializes in no-code and low-code app development, delivering personalized, scalable web and mobile applications with seamless user experiences across multiple platforms.”
QAXPRO TECH
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QAXPRO is a leading technology services company headquartered in India, committed to providing comprehensive digital transformation solutions for businesses around the globe. We excel at transforming intricate business problems into smooth digital experiences by combining innovative software develop
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
28% Custom Web Application Development
20% Mobile App Development (iOS & Android)
2% Legacy System Modernization
50% Managed IT Services
AI Summary
“QAXPRO, an Indian technology leader, delivers innovative digital transformation through automated software development, UI/UX design, and cloud solutions, enhancing business efficiency and growth globally.”
SR NEXT
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SR Next focuses on cutting-edge technology and innovation that simplify your life through tech solutions. Our expertise in current trends enables you to enhance both yourself and your business or services. With unwavering commitment and advanced technological knowledge, we strive to realize our clie
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Indore, Madhya Pradesh, In
Services Provided+3 Services
23% Custom Web Application Development
13% Backend Development
10% Frontend Development
2% Legacy System Modernization
AI Summary
“SR NEXT is an Indian technology firm specializing in custom software development and IT staff augmentation, delivering responsive web applications and digital transformation solutions using modern technologies.”
IT Gale
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ITgale is a comprehensive web development firm that creates high-performance digital products for a global audience. The company focuses on custom websites, e-commerce solutions, SaaS systems, and AI-driven applications, assisting businesses in developing scalable, secure, and future-proof products.
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Bratislava, Bratislava, Sk
Services Provided+2 Services
30% Custom Web Application Development
15% API Development & Integration
5% Legacy System Modernization
13% AI Agent & Multi-Agent System Development
AI Summary
“ITgale is a global web development firm delivering custom, scalable digital solutions including websites, e-commerce, SaaS, and AI applications, ensuring client satisfaction through risk-free project delivery.”
DoDigitals
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Founder of Do Digitals | Digital Engineering & Creative Strategy I'm an engineer at heart and an entrepreneur by passion. As the Founder of Do Digitals, I lead a dedicated team of technologists and creatives in Jaipur, focused on creating strong digital infrastructures for businesses around the glob
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
27% Custom Web Application Development
7% Legacy System Modernization
10% Product UX Strategy
7% UX Research & Usability Testing
AI Summary
“Do Digitals, led by an engineer-entrepreneur, delivers customized web development, digital marketing, and creative branding services, building resilient digital infrastructures to drive global business growth.”
Grey Creative
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At Grey Creative, I combine two often unrelated fields: the meticulousness of system analysis and the artistic flair of contemporary web design. During the day, I serve as a System Analyst, developing scalable solutions for large enterprises. In my free time, I’m a Web Designer who assists small and
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
Przasnysz, Masovian, Pl
Services Provided+3 Services
20% Custom Web Application Development
10% API Development & Integration
3% Legacy System Modernization
20% Product UX Strategy
AI Summary
“Grey Creative integrates system analysis and modern web design, leveraging AI to deliver efficient, user-focused digital solutions that align business goals with technology and creativity.”
Genuitek
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Genuitek is a software development firm offering software and consulting services to clients worldwide. We have successfully partnered with large corporations such as ING, SAP, IBM, and Roamware, as well as startups like SundhedsDanmark and JP Motorsport Racing Team. Our solutions deliver significan
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Wroclaw, Pl
Services Provided+7 Services
8% Custom Web Application Development
3% Legacy System Modernization
6% IT Staff Augmentation
5% Backend Development
AI Summary
“Genuitek, a Poland-based firm, delivers custom software development, UX/UI design, IT consulting, and staff augmentation, helping clients optimize operations, modernize applications, and enhance digital products globally.”
Zafirus
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Desarrollamos aplicaciones móviles y plataformas web intuitivas e innovadoras, además de ofrecer servicios de outsourcing en TI con profesionales certificados que pueden enfrentar desafíos complejos. En nuestra Software Factory, nos enfocamos en medir lo que es relevante; somos una empresa impulsada
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Rosario, Santa Fe, Ar
Services Provided+8 Services
4% Frontend Development
4% Backend Development
5% Custom Web Application Development
10% Mobile App Development (iOS & Android)
AI Summary
“Zafirus delivers data-driven mobile and web applications with certified IT outsourcing, specializing in fintech and health sectors, ensuring comprehensive support and expert team assembly for complex challenges.”
Exigea
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At Exigea, we take pride in our capability to develop software that not only fulfills but surpasses expectations. Whether it's for web or mobile applications, data processing, or integrating outside services, we are here to assist you.
Highlights
$5,000+
Min Project Size
10-49
Employees
Services Provided+2 Services
20% Custom Web Application Development
13% API Development & Integration
5% Legacy System Modernization
10% Mobile App Development (iOS & Android)
AI Summary
“Exigea specializes in developing advanced software solutions, excelling in web and mobile applications, data processing, and integration services to exceed client expectations.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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