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

Advantcomp Consulting Inc.
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We are a custom web software and app development company, celebrating our 17th year and located in the stunning British Columbia. Our primary goal is to create high-quality products that prioritize the needs of our customers!
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Sidney, British Columbia, Ca
Services Provided+1 Services
25% Mobile App Development (iOS & Android)
40% Custom Web Application Development
5% Legacy System Modernization
15% Backend Development
AI Summary
“Advantcomp Consulting Inc. is a British Columbia-based software and app development firm with 17 years' experience, dedicated to delivering high-quality, customer-focused digital solutions.”
TORQ IT Limited
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TORQ is a digital solutions partner based in North America, focusing on scalable eCommerce, product data infrastructure, and tailored development services. With extensive expertise in Pimcore, Shopware, and contemporary data architecture, we assist organizations in consolidating and operationalizing
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Charlottetown, Prince Edward Island, Ca
Services Provided+3 Services
15% E-Commerce Development
8% API Development & Integration
2% Legacy System Modernization
10% UX Audit & Heuristic Evaluation
AI Summary
“TORQ IT Limited, a leading North American digital solutions partner, specializes in scalable eCommerce, enterprise modernization, API integration, UX/UI design, and content management for sustained client growth.”
MODAFA
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We are a software development firm dedicated solely to providing software development services, whether offshore, onshore, or nearshore. Our experience spans working with startups, software product companies, digital agencies, and enterprises to streamline their IT outsourcing and lower costs and ti
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Yaounde, Centre, Cm
Services Provided+4 Services
15% Custom Web Application Development
13% Mobile App Development (iOS & Android)
10% Backend Development
8% Frontend Development
AI Summary
“MODAFA is a software development firm specializing in IT outsourcing with a skilled Cameroonian talent pool, offering expertise in various programming languages and tailored infrastructures.”
web24.com.pl Sp. z o.o.
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Your project is our top priority. Web24 is a software development company and interactive agency. Our team will develop a website, online store, or web portal that functions flawlessly. It will be technologically outstanding! We've been honing our web design skills for 13 years. We manage your proje
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Gdynia, Pomeranian, Pl
Services Provided+2 Services
20% Custom Web Application Development
10% E-Commerce Development
3% Legacy System Modernization
17% UX Research & Usability Testing
AI Summary
“web24.com.pl Sp. z o.o. is a seasoned software development and interactive agency offering comprehensive web design, development, marketing, and support services, with extensive experience and client success.”
Scion Internet
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Scion Internet specializes in creating strong and secure web applications and services that standard solutions cannot match. Our web development offerings are effective, engaging, and dependable, delivering results consistently. We have a custom web development team at Scion Internet that is focused
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Kendal, England, Gb
Services Provided+2 Services
27% Custom Web Application Development
3% E-Commerce Development
3% Legacy System Modernization
17% UX Research & Usability Testing
AI Summary
“Scion Internet develops custom, secure web applications tailored to complex business workflows, enhancing efficiency, reducing costs, and delivering reliable, effective digital solutions.”
Ant Farm
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At Ant Farm, we create solid architectural designs that align with your business objectives and technological requirements, guaranteeing that your software is both resilient and adaptable for future challenges. Our experience spans across startups, mid-sized firms, and large organizations, allowing
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Pune, Maharashtra, In
Services Provided+2 Services
18% Custom Web Application Development
20% API Development & Integration
8% E-Commerce Development
5% Legacy System Modernization
AI Summary
“Ant Farm delivers expert software architecture and development, cloud infrastructure, code auditing, and strategic technology consulting to startups and enterprises, ensuring scalable, secure, and high-quality solutions.”
Lemma
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Lemmaprovides top-notch engineering teams. We collaborate with both startups and large enterprises to create tailored software solutions. Our experienced and proficient teams are prepared to deliver code starting from Day 1.
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Los Angeles, California, Us
Services Provided+4 Services
20% Custom Web Application Development
15% Mobile App Development (iOS & Android)
3% Blockchain & Web3 Development
7% E-Commerce Development
AI Summary
“Lemma delivers expert engineering teams to startups and enterprises, offering customized software solutions with experienced professionals ready to contribute from Day 1.”
Innovalabs Technologies
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Innovalabs Technologies has been a comprehensive software development firm based in the USA since 2016. We are recognized as one of the top technology consulting companies and employ a skilled team of Smart Contract Developers dedicated to supporting your business success.
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
13% Custom Web Application Development
10% Mobile App Development (iOS & Android)
8% E-Commerce Development
13% API Development & Integration
AI Summary
“Innovalabs Technologies, established in 2016 in the USA, is a leading software development and technology consulting firm specializing in smart contract solutions to support business success.”
Brainence
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Brainence creates top-tier software and the engineering teams that support it. For over 9 years, we have assisted more than 80 startups and enterprises in closing talent shortages, scaling efficiently, and delivering high-performing products. Our expertise covers various industries, including health
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Lviv, Lviv, Ua
Services Provided+22 Services
3% ERP & CRM Development
3% QA & Software Testing
4% Frontend Development
4% Backend Development
AI Summary
“Brainence delivers custom software development and dedicated engineering teams across industries, specializing in web, mobile, SaaS, AI solutions, leveraging modern technologies for scalable, high-quality products.”
Achek
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Achek Digital Solutions is a contemporary technology firm that assists both individuals and businesses in expanding their online presence. Our areas of expertise include website design and development, mobile applications, digital marketing, branding, UI/UX design, hosting, domain registration, cybe
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+8 Services
15% Custom Web Application Development
10% Software Development Services
10% E-Commerce Development
10% Legacy System Modernization
AI Summary
“Achek excels in Software Development with expertise in custom web applications, mobile apps, e-commerce solutions, API development, and legacy system modernization, effectively supporting comprehensive digital transformation for businesses.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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