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

MN Techgroup
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Providing tailored software solutions that propel your business ahead. Discover innovation, dependability, and quality through our professional services.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
15% Custom Web Application Development
13% Mobile App Development (iOS & Android)
10% API Development & Integration
7% E-Commerce Development
AI Summary
“MN Techgroup delivers customized software solutions emphasizing innovation, quality, and dependability, helping businesses enhance performance and achieve growth through professional services.”
Gabcloud LLC
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We leverage artificial intelligence to create cutting-edge products and services. Our technology has the ability to transform established industries and open up new avenues for growth.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
22% Mobile App Development (iOS & Android)
10% Custom Web Application Development
2% Legacy System Modernization
20% Product UX Strategy
AI Summary
“Gabcloud LLC harnesses artificial intelligence to develop innovative products and services, driving transformation across established industries and fostering new growth opportunities.”
Devvowel inc
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Devvowel Inc. is a software development firm that works with over 20 experienced professionals, focusing on analytics-driven web and mobile solutions. Our team has successfully launched more than 15 products for startups and established companies as IT consultants. We navigate complex industries and
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Cordoba, Cordoba, Ar
Services Provided+6 Services
15% Custom Web Application Development
10% Mobile App Development (iOS & Android)
8% Backend Development
8% Frontend Development
AI Summary
“Devvowel Inc. is a software development firm offering expert consulting, analytics-driven web and mobile solutions, employing Agile methods, diverse programming skills, and comprehensive project ownership from prototype to support.”
Coreflict
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Coreflict is a technology solutions company that offers services in web development, mobile app development, quality assurance and testing, as well as AI chatbot solutions.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Durgapur, West Bengal, In
Services Provided+5 Services
12% Custom Web Application Development
5% API Development & Integration
7% Backend Development
3% Legacy System Modernization
AI Summary
“Coreflict provides comprehensive technology services including web and mobile app development, quality assurance, testing, and AI chatbot solutions, delivering versatile digital innovation for diverse client needs.”
IT Systems Sp. z o.o.
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At It Systems, we specialize in resolving your challenges. Are you struggling with a complicated invoicing process that results in lost revenue due to mistakes? We can help. Is your customer service process so frustrating that it drives you up the wall in just five minutes? We can fix that too. Do y
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Chorzow, Silesian, Pl
Services Provided+6 Services
6% QA & Software Testing
4% Legacy System Modernization
8% Mobile App Development (iOS & Android)
8% Custom Web Application Development
AI Summary
“IT Systems Sp. z o.o. delivers innovative software solutions across diverse sectors, streamlining invoicing, customer service, and idea realization to enhance business efficiency and success.”
BOXBOB Group
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We are a craft development studio focused on creating web solutions for small businesses and entrepreneurs. Our team has experience from companies such as Microsoft and the US Department of Defense, offering services that range from designing small business landing pages to full platform architectur
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Sheridan, Wyoming, Us
Services Provided+7 Services
7% API Development & Integration
2% Blockchain & Web3 Development
10% Custom Web Application Development
3% Mobile App Development (iOS & Android)
AI Summary
“BOXBOB Group is a craft development studio delivering tailored web solutions, from design to platform architecture, combining expert consulting with flexible services for small businesses.”
LEVIEV'S
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Levievs – Your Partner in Custom Software and Marketing Excellence Levievs is a premier software development and marketing firm located in Israel, boasting over 25 years of industry experience. We focus on developing impactful web platforms, mobile applications, and cloud solutions that help busine
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Tel Aviv-Yafo, Il
Services Provided+28 Services
2% Code Review & Technical Audits
2% SaaS Product Development
2% Mobile App Development (iOS & Android)
2% Legacy System Modernization
AI Summary
“Levievs, an Israeli software and marketing firm with over 25 years experience, delivers custom software, cloud solutions, AI, and digital marketing to startups and enterprises globally.”
Code Amateur
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Code Amateur Technologies Pvt Ltd is a startup and a prominent provider of innovative technologies and services, delivering scalable solutions for businesses of any size. At Code Amateur Technologies, smart solutions are central to our approach. Our primary aim is to discover intelligent application
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
10% Mobile App Development (iOS & Android)
4% E-Commerce Development
2% Legacy System Modernization
4% QA & Software Testing
AI Summary
“Code Amateur Technologies Pvt Ltd is a startup specializing in innovative, scalable mobile and web application development, delivering intelligent solutions to enhance business operations across industries.”
Lambda Team
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A group of 52 highly skilled developers specializing in: - Advanced cloud solutions and AWS architecture and DevOps - Both serverless and server-based web services - Backend development using Node.js, Python, and GoLang - Frontend development with React.js and Vue.js - Cross-platform mobil
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+7 Services
8% Frontend Development
7% Mobile App Development (iOS & Android)
3% Legacy System Modernization
10% Backend Development
AI Summary
“Lambda Team is a group of 52 skilled developers specializing in cloud solutions, AWS DevOps, backend (Node.js, Python, GoLang), frontend (React.js, Vue.js), and cross-platform mobile development.”
IGODEV LLC
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IGODEV is a privately owned consulting firm located in Dallas, TX, accompanied by a skilled team of consultants in Ukraine. We collaborate with top professionals in the industry to offer a range of development services to our clients in the U.S. No matter the needs of your project, IGODEV is ready t
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+6 Services
17% Mobile App Development (iOS & Android)
13% Custom Web Application Development
3% Legacy System Modernization
17% IT Staff Augmentation
AI Summary
“IGODEV LLC is a Dallas-based consulting firm with Ukrainian consultants, offering expert, cost-effective IT development services across diverse sectors for U.S. clients with proven success.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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