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

Make IT Solutions
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Engineering services for software and products aimed at both enterprises and startups, with a focus on commodity auctions, logistics, and software-as-a-service (SaaS) solutions.
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Calgary, Alberta, Ca
Services Provided
50% Custom Web Application Development
30% E-Commerce Development
20% Legacy System Modernization
AI Summary
“Make IT Solutions provides engineering services for software and products, specializing in commodity auctions, logistics, and SaaS solutions to support enterprises and startups.”
Nubeslab
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Nubeslab was established with the conviction that leveraging new technology is essential for maintaining competitiveness and achieving success. After many years of collaboration across various sectors, Nubeslab has gained profound insights into their unique characteristics, enabling a highly tailore
Highlights
10-49
Employees
Kuala Lumpur, Kuala Lumpur, My
Services Provided
50% Custom Web Application Development
30% E-Commerce Development
20% Legacy System Modernization
AI Summary
“Nubeslab delivers tailored enterprise software solutions globally, combining technical expertise and industry insights to optimize operations and drive success across diverse sectors.”
Zergware LLC
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We are a team of software developers with experience ranging from Wall Street in New York City to small businesses throughout the Northeast. Our company is dedicated to finding mutually beneficial solutions for our clients. When we handle cloud infrastructure projects, our fees are determined by the
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+2 Services
25% Legacy System Modernization
15% Workflow Automation (Zapier / Make / n8n)
5% AI Strategy & Roadmap Consulting
5% Cloud Consulting & SI
AI Summary
“Zergware LLC offers domestic software development, specializing in cost-saving automation, cloud infrastructure, and revenue-generating solutions, emphasizing direct client-developer collaboration for effective outcomes.”
TARAinteractive
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TARA interactive is a comprehensive custom software development firm founded in 1991, catering to major financial institutions worldwide. Our dedicated team of certified professionals is committed to the software development and delivery process. We prioritize client satisfaction, continually strive
Highlights
$50-99/hr
Avg Hourly Rate
10-49
Employees
Bucuresti, Bucuresti, Ro
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
15% E-Commerce Development
20% Legacy System Modernization
AI Summary
“Founded in 1991, TARAinteractive specializes in custom software development for global financial institutions, emphasizing client satisfaction and delivering high-quality solutions through expert teams.”
Deecodes.io
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DeeCodes.io specializes in low-code development, delivering significant benefits to businesses. I assist organizations in navigating their digital transformation and establishing systems that leverage low-code technology.
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Salem, Tamil Nadu, In
Services Provided
30% Mobile App Development (iOS & Android)
50% Custom Web Application Development
20% Legacy System Modernization
AI Summary
“DeeCodes.io specializes in low-code development, helping businesses accelerate digital transformation by implementing efficient, scalable low-code systems that enhance operational capabilities.”
Vofox Solutions
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Vofox Solutions is a well-known offshore software development company in India, boasting a high success rate in its services and achieving complete customer satisfaction.
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Kochi, Kerala, In
Services Provided+1 Services
20% Software Development Services
20% E-Commerce Development
20% Legacy System Modernization
20% Mobile App Development (iOS & Android)
AI Summary
“Vofox Solutions is an Indian offshore software development company known for delivering high-quality services with a strong focus on customer satisfaction and successful project outcomes.”
Nubex Technology
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We create tailored web and mobile software solutions utilizing the most advanced technology stacks, guaranteeing optimal performance and reliability through strong coding practices and cloud technologies. Our aim is to turn your concepts and intricate challenges into efficient and budget-friendly so
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Izmir, Izmir, Tr
Services Provided+2 Services
30% Custom Web Application Development
20% Software Development Services
20% Legacy System Modernization
10% Machine Learning Model Development
AI Summary
“Nubex Technology specializes in tailored web and mobile software solutions using advanced technologies and cloud services to deliver efficient, reliable, and cost-effective projects since 2020.”
SVVATECH
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### About SVVATECH SVVATECH is a technology consulting and software development firm that focuses on scalable architecture, microservices design, and rapid application development. We support businesses of all sizes—from startups to multinational corporations—in accelerating digital transformation
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Bengaluru, Karnataka, In
Services Provided+1 Services
20% API Development & Integration
20% DevOps Engineering
20% Legacy System Modernization
20% IT Staff Augmentation
AI Summary
“SVVATECH specializes in technology consulting and software development, delivering scalable, cloud-native solutions with expertise in microservices, agile methodologies, and digital transformation across diverse industries.”
Deyo Group, Inc.
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Deyo Group is a web services and solutions provider that focuses on creating bespoke coding solutions designed to enhance operational efficiency and promote a smooth, technology-driven business environment for our clients.
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Wylie, Texas, Us
Services Provided+1 Services
20% Software Development Services
20% E-Commerce Development
20% Legacy System Modernization
20% Mobile App Development (iOS & Android)
AI Summary
“Deyo Group, Inc. delivers customized web services and coding solutions to improve operational efficiency and facilitate seamless, technology-driven business processes for clients.”
Emergys Corporation
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For over 25 years, Emergys has been assisting organizations in aligning their long-term IT strategies with their business goals by utilizing an appropriate combination of technology, personnel, and processes, all while promoting ethical business practices for the advantage of customers, suppliers, e
Highlights
$250,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
1000-9999
Employees
Morrisville, North Carolina, Us
Services Provided+1 Services
20% QA & Software Testing
20% BI & Big Data Consulting & SI
20% Legacy System Modernization
20% Generative AI
AI Summary
“Emergys Corporation offers comprehensive digital transformation solutions including SAP, AI, and hyperautomation, aligning IT strategies with business goals globally, emphasizing innovation, ethics, and customer-focused value.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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