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

APG Technology
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Driving growth through AI, automation, and tailored software solutions, APG Technology is an award-winning digital product agency that connects intricate business challenges with scalable technology. We assist growth-stage companies and enterprises in sectors such as Healthcare, Fintech, and Governm
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Atlanta, Georgia, Us
Services Provided+2 Services
23% Custom Web Application Development
20% Mobile App Development (iOS & Android)
7% Legacy System Modernization
10% AI Strategy & Roadmap Consulting
AI Summary
“APG Technology is an award-winning digital agency delivering AI, automation, custom software development, and modernization services to accelerate growth for enterprises across healthcare, fintech, and government sectors.”
TRooTech Business Solutions
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We are a strategic technology partner dedicated to assisting enterprises in the creation of intelligent digital products, streamlining operations, and upgrading business systems through scalable engineering solutions. With the trust of renowned global brands like IKEA, Chheda, and Mattel, we provide
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
250-999
Employees
Ahmedabad, Gujarat, In
Services Provided+10 Services
20% Software Development Services
10% CRM Consulting and SI
10% IT Staff Augmentation
10% Mobile App Development (iOS & Android)
AI Summary
“TRooTech Business Solutions partners with enterprises to deliver AI-driven digital products, scalable software, and data analytics, enhancing operations and enabling sustainable, innovative business growth.”
Making Sense
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From the moment we entered the industry, we have been crafting successful business narratives alongside our partners, developing software products from scratch and enhancing existing ones to maximize our partners’ impact. From initial idea to final delivery, we enable our partners to create technolo
Highlights
$250,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
250-999
Employees
Services Provided+2 Services
10% Legacy System Modernization
15% Custom Web Application Development
25% IT Staff Augmentation
15% Business Model Design & Validation
AI Summary
“Making Sense collaborates with partners to design, develop, and enhance software products, leveraging creativity and technology to drive growth, innovation, and lasting business success.”
FlaminTech LLP
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Flamintech LLP is a prominent IT company located in India, established in 2014 with the goal of providing digital solutions through robust connections. Based in Gujarat, the company has a workforce of over 30 employees dedicated to transforming local businesses, operations, and technology into next-
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided
25% Custom Web Application Development
50% Mobile App Development (iOS & Android)
15% E-Commerce Development
10% Legacy System Modernization
AI Summary
“Flamintech LLP, based in Gujarat, India, offers advanced digital solutions including mobile app development, gaming, web development, and software services, transforming businesses since 2014.”
Arkin Software
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Arkin Software Technologies is a leader in the migration and modernization of legacy applications, offering Database Migration Services through its unique proprietary tools, methodologies, and graphical user interface components. This approach aims to prolong the lifespan of legacy applications whil
Highlights
$100,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Services Provided+3 Services
3% QA & Software Testing
17% Legacy System Modernization
5% Custom Web Application Development
8% Mobile App Development (iOS & Android)
AI Summary
“Arkin Software Technologies specializes in modernizing and migrating legacy applications, using proprietary tools and methodologies to extend application lifespan and align business processes with current IT standards.”
HS High Stake GmbH
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About Us: High Stake is your partner in agile software and mobile app development. We focus on providing custom solutions that advance businesses, guiding you from the initial idea through to perfect implementation and beyond. Our expertise extends beyond new developments; we also provide thorough s
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Karlsruhe, Baden Wurttemberg, De
Services Provided+1 Services
30% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% Backend Development
15% Frontend Development
AI Summary
“HS High Stake GmbH delivers agile, custom software and mobile app development, offering end-to-end solutions and robust support to enhance and maintain diverse business systems.”
Dolmen Technology
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Dolmen Technology, an Italian IT consulting firm, is seeking medium to small remote projects for our team. We are interested in acquiring new clients or external projects to work on.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Saronno, Lombardy, It
Services Provided+1 Services
30% Custom Web Application Development
20% Frontend Development
25% Backend Development
15% QA & Software Testing
AI Summary
“Dolmen Technology is an Italian IT consulting firm specializing in remote medium to small projects, focusing on acquiring new clients and external engagements to expand its service portfolio.”
Playtime Solutions
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Playtime Solutions focuses on assisting essential service sectors that are heavily regulated and where technology plays a crucial role in influencing public outcomes. We provide solutions to organizations that support community development, protect welfare, and manage public resources, enabling them
Highlights
$5,000+
Min Project Size
$150+/hr
Avg Hourly Rate
10-49
Employees
Melbourne, Victoria, Au
Services Provided+1 Services
23% AI Strategy & Roadmap Consulting
10% AI Agent & Multi-Agent System Development
20% Custom Web Application Development
14% Legacy System Modernization
AI Summary
“Playtime Solutions delivers secure technology consulting and development services for essential, regulated sectors, modernizing platforms and data systems to enhance public welfare and community outcomes.”
SpringTree
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Are you in search of a skilled group of software engineers to take on a unique challenge? Your search ends here. Our team has the expertise to handle UX and design, front-end development, as well as back-end deployments and orchestration in the cloud. While we can certainly create a website for you,
Highlights
$50,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Almere, Flevoland, Nl
Services Provided+1 Services
30% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% Backend Development
15% Frontend Development
AI Summary
“SpringTree delivers expert software engineering services, specializing in UX, front-end, back-end development, and cloud orchestration, focusing on comprehensive web and mobile applications.”
Heuristic Deterministic Labs - HD Labs
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HD Labs is a reputable technology firm that provides solutions in the fields of Blockchain, Web, and Mobile. The founding team boasts experience from globally recognized companies such as Yahoo, the New York Stock Exchange, and ICE. HD Labs possesses extensive expertise with both startups and enterp
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Hyderabad, Telangana, In
Services Provided+2 Services
20% Blockchain & Web3 Development
5% E-Commerce Development
5% Legacy System Modernization
13% Backend Development
AI Summary
“Heuristic Deterministic Labs is an Indian technology company delivering expert blockchain, cloud consulting, and software development services with advanced expertise in Web3, frontend/backend, and cloud platforms.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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