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

Sheetcast
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We offer Custom Web Application Development Consulting and Excel-to-Web-App Consulting Services for businesses of all sizes. With our proprietary Sheetcast technology, we assist organizations in converting their spreadsheets into secure, scalable web applications that are customized to their workflo
Highlights
50-249
Employees
Edmonton, Alberta, Ca
Services Provided
70% Custom Web Application Development
10% Legacy System Modernization
20% API Development & Integration
AI Summary
“Sheetcast specializes in transforming spreadsheets into secure, scalable web applications through custom development, training, and ongoing support, enhancing business efficiency while reducing software costs.”
Elumad
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Elumad specializes in creating tailored business software using PHP/Laravel and Filament for companies and agencies seeking dependable, security-focused systems that align with their workflows. As a partner in custom software development, we craft internal platforms, dashboards, portals, and back-of
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Almeria, Es
Services Provided
60% Custom Web Application Development
30% API Development & Integration
10% Legacy System Modernization
AI Summary
“Elumad delivers tailored PHP/Laravel software solutions with AI automation, integrating ERP/CRM systems for businesses and agencies, ensuring secure, maintainable, GDPR-compliant applications and ongoing support.”
Kirrhosoft
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Kirrhosoft was created by Farhan Sajjad, an experienced software engineer with many years of designing systems for global markets. He observed a common issue across the industry: the gap between a product's intended vision and its actual technical execution. This realization led to the founding of K
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Dhaka, Dhaka, Bd
Services Provided+2 Services
8% Mobile App Development (iOS & Android)
13% Legacy System Modernization
10% API Development & Integration
12% Custom Web Application Development
AI Summary
“Kirrhosoft specializes in delivering scalable, secure, and maintainable software solutions by bridging the gap between product vision and technical execution with engineering craftsmanship.”
ReacTree
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At Reactree, our enthusiastic team of technology experts is committed to bringing your digital concepts to life. With a strong emphasis on innovation and user-focused design, we specialize in mobile app development, web application development, CMS and custom website development, as well as Flutter
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Karachi, Sindh, Pk
Services Provided+1 Services
40% Mobile App Development (iOS & Android)
30% Custom Web Application Development
10% API Development & Integration
10% E-Commerce Development
AI Summary
“ReacTree specializes in innovative mobile, web, CMS, and Flutter app development, delivering user-focused, scalable digital solutions that enhance brand presence and support business growth.”
FlairsTech
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At FlairsTech, we think technology should conform to your needs, rather than forcing you to change. Our journey started with a straightforward concept: merge advanced intelligence with a focus on human talent. This led us to reshape the concept of a managed services provider. We crafted our services
Highlights
$50,000+
Min Project Size
< $25/hr
Avg Hourly Rate
1000-9999
Employees
Montreal, Quebec, Ca
Services Provided+2 Services
30% Customer Support Outsourcing
20% Managed IT Services
15% Other IT Consulting and SI
15% Software Development Services
AI Summary
“FlairsTech delivers adaptable managed IT services blending advanced intelligence with human expertise, seamlessly integrating into client environments and evolving with their needs for optimal partnership.”
Endeavour Africa Limited
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In the vast landscape of Business Solutions providers within the information technology sector, EAG was established in 2002 with the clear goal of becoming the preferred provider of advanced business solutions that are innovative, cost-effective, and results-driven. Our growing client base now excee
Highlights
50-249
Employees
Nairobi City, Ke
Services Provided
40% Custom Web Application Development
10% Legacy System Modernization
50% IT Helpdesk & Support Services
AI Summary
“Endeavour Africa Limited, founded in 2002, delivers innovative, cost-effective IT business solutions with comprehensive design, integration, training, and 24x6 support to over 3,000 African clients.”
Noralogix
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Our company combines extensive experience in both software development and business acumen. Noralogix creates and maintains cloud-based omni-channel contact center solutions tailored for forward-thinking leaders in growth-oriented contact centers. Established by technology experts, we primarily conc
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Johannesburg, Gauteng, Za
Services Provided
40% Custom Web Application Development
10% Legacy System Modernization
50% Cloud Consulting & SI
AI Summary
“Noralogix develops and maintains cloud-based omni-channel contact center solutions leveraging platforms like Genesys Cloud, Twilio, AWS, and Azure for growth-focused businesses.”
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Tireda Technology
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We assist organizations in developing superior software and enhancing team efficiency by providing expert consulting and tailored solutions.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Ikeja, Lagos, Ng
Services Provided
20% Legacy System Modernization
60% Custom Web Application Development
20% Mobile App Development (iOS & Android)
AI Summary
“Tireda Technology specializes in delivering expert consulting and customized software solutions to improve organizational software quality and enhance team productivity across industries.”
SoftGroup
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SoftGroup is an international software firm that aids the Pharmaceutical and MedTech sectors in adapting their operations to meet the challenges of the modern economy. With 20 years of experience, SoftGroup has established itself as a trusted partner for serialization, aggregation, and traceability,
Highlights
$250,000+
Min Project Size
50-249
Employees
Sofia, Sofia, Bg
Services Provided
40% Custom Web Application Development
10% Legacy System Modernization
50% Managed IT Services
AI Summary
“SoftGroup is a trusted international software firm specializing in serialization, aggregation, and traceability solutions for pharmaceutical and MedTech industries, serving diverse clients globally for 20 years.”
Altamira Consulting Services Inc
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We offer cost-effective, top-notch technology solutions designed to assist organizations in competing, succeeding, and expanding. Our dedication lies in developing and delivering the finest solutions, allowing you to concentrate on business growth. We strive tirelessly for outstanding service qualit
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Richmond Hill, Ontario, Ca
Services Provided
40% Custom Web Application Development
10% Legacy System Modernization
50% Web App UI Design
AI Summary
“Altamira Consulting Services Inc. delivers cost-effective, high-quality technology solutions enabling organizations to enhance competitiveness, achieve success, and focus on business growth with exceptional service.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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