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

INS Factory S.R.L.
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We are Intelligent Software Factory, a dedicated group of Microsoft certified software developers boasting two decades of industry experience. Our goal is to enhance business capabilities by fully leveraging Microsoft technologies. In the fast-changing digital environment of today, we recognize that
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Paleu, Ro
Services Provided+1 Services
13% QA & Software Testing
17% Legacy System Modernization
20% Custom Web Application Development
35% Cloud Consulting & SI
AI Summary
“INS Factory S.R.L. specializes in customized Microsoft-based software solutions, leveraging two decades of expertise to enhance business capabilities in a dynamic digital environment.”
SmartNet Technologies DOO
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SmartNet is a company that relies on high-quality work and outstanding results to drive its business success. We establish every project, client, and business relationship through referrals and the positive feedback of satisfied customers. Each project is managed by a team of specialists who are exp
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Nis, Nisava District, Rs
Services Provided
35% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% QA & Software Testing
15% Legacy System Modernization
AI Summary
“SmartNet Technologies DOO delivers high-quality, innovative software solutions through expert teams, emphasizing client collaboration, adaptability, and cutting-edge technology to build lasting partnerships.”
CloudPost
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We are a global remote team based in Romania, with members who possess extensive experience in major international companies across the US, Europe, and Asia. The services we provide include:
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Timisoara, Timis, Ro
Services Provided+2 Services
20% Cloud Consulting & SI
15% Machine Learning Model Development
10% AI Strategy & Roadmap Consulting
5% Other IT Consulting and SI
AI Summary
“CloudPost is a global remote team specializing in AI-driven automation, custom software development, and enterprise app modernization, delivering innovative digital solutions across diverse industries.”
Nanotech Soft N App IT Solutions
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Nanotech Soft N App IT Solutions is a frontrunner in software development services. Founded in 2016, we have been delivering dependable and cost-effective IT solutions to clients worldwide. Initially, we began our software development operations in Australia, and we are now expanding into various ot
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Gurugram, Haryana, In
Services Provided+2 Services
25% Other IT Consulting and SI
25% QA & Software Testing
15% Software Development Services
15% Legacy System Modernization
AI Summary
“Nanotech Soft N App IT Solutions delivers reliable, cost-effective software development and IT services globally, supporting growing businesses with secure solutions and free consultations since 2016.”
Astadia Consulting
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Astadia offers consulting services for cloud solutions and systems integration, aimed at helping businesses achieve faster results. The company reshapes the way its clients identify market opportunities, boost revenues, and turn customers into supporters. Unlike other integrators that focus solely o
Highlights
$100-149/hr
Avg Hourly Rate
250-999
Employees
Jacksonville, Florida, Us
Services Provided
33% Cloud Consulting & SI
33% Managed IT Services
14% Legacy System Modernization
20% Custom Web Application Development
AI Summary
“Astadia Consulting delivers tailored cloud and systems integration services, emphasizing deep client understanding and proven methodologies to drive measurable business outcomes and growth.”
Tech Mantra
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Techmantra serves as your comprehensive resource for digital transformation. We utilize Desktop, Cloud, and Mobile technologies to develop top-notch solutions at every stage, from strategy through execution. Unlock your growth potential with our approach grounded in data insights.
Highlights
10-49
Employees
Kolkata, West Bengal, In
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% API Development & Integration
10% Legacy System Modernization
AI Summary
“Tech Mantra delivers comprehensive digital transformation solutions using desktop, cloud, and mobile technologies, leveraging data insights to drive strategy and execution for business growth.”
Bamboo Agile
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Bamboo Agile is a software development firm based in Tallinn, Estonia. For nearly twenty years, we have been providing solutions across various sectors, including telecommunications, education, healthcare, marketing, and e-commerce, with a global presence that spans from the United States to the UAE
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Tallinn, Harju, Ee
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% E-Commerce Development
10% Legacy System Modernization
AI Summary
“Bamboo Agile is an Estonian software development firm with nearly 20 years of experience delivering end-to-end solutions across diverse industries globally, partnering with leading telecommunications and service brands.”
Napal Innovation
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Napal Innovation offers scalable and integrated IT solutions that transform businesses digitally. Our services encompass a wide range, including software and app development, feasibility studies, proof of concept and MVP development, maintenance, dedicated IT team support, and expert technical advic
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+2 Services
20% BI & Big Data Consulting & SI
20% Software Development Services
20% Legacy System Modernization
20% Other IT Consulting and SI
AI Summary
“Napal Innovation delivers scalable, integrated IT solutions including software development, feasibility studies, and technical support, serving diverse clients from startups to multinational corporations with quality and trust.”
Alchemative
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We are a software development firm dedicated to addressing challenges in e-commerce, retail, and digital transformation. Our clients recognize us as a top-tier eCommerce agency, and we are endorsed by Shopify as Shopify Plus Partners and Shopify Experts. We have successfully provided solutions.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Dubai, Dubayy, Ae
Services Provided+1 Services
45% E-Commerce Development
25% Custom Web Application Development
10% Mobile App Development (iOS & Android)
10% QA & Software Testing
AI Summary
“Alchemative is a software development firm specializing in e-commerce, retail, and digital transformation, recognized as a top Shopify Plus Partner and expert for delivering effective solutions.”
Softjourn
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Softjourn is a comprehensive consulting and software development firm specializing in Fintech and Media & Entertainment, particularly in Ticketing. Based in Silicon Valley, California, with research and development centers in Ukraine, Poland, and Brazil, Softjourn boasts over 20 years of global expe
Highlights
$50-99/hr
Avg Hourly Rate
250-999
Employees
Wroclaw, Lower Silesian, Pl
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% Blockchain & Web3 Development
10% Legacy System Modernization
AI Summary
“Softjourn is a global software development and consulting firm specializing in Fintech and Media & Entertainment, delivering innovative AI and blockchain solutions with a 300+ expert team.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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