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

IntegrIT Solutions
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IntegrIT Solutions provides custom software tailored for essential business operations at an enterprise level. We collaborate with established organizations, leveraging our skills in mobile applications, web platforms, and IoT systems to create solutions that enhance efficiency, minimize risks, and
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
Rottweil, Baden Wurttemberg, De
Services Provided+7 Services
10% Mobile App Development (iOS & Android)
8% Backend Development
5% Custom Web Application Development
3% Legacy System Modernization
AI Summary
“IntegrIT Solutions delivers tailored enterprise software and digital infrastructures across Europe, combining technical expertise with business insight to enhance efficiency, security, and long-term reliability.”
Allion Technologies
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Our enthusiasm, dedication, and distinctive approach inspire us to create outstanding experiences for our clients. We develop modern engineering solutions and facilitate a variety of transformative journeys for businesses around the world. We prioritize investment in our personnel, processes, and to
Highlights
$25,000+
Min Project Size
50-249
Employees
Sri Jayawardenepura Kotte, Lk
Services Provided+11 Services
10% Custom Web Application Development
3% Mobile App Development (iOS & Android)
3% E-Commerce Development
5% Backend Development
AI Summary
“Allion Technologies is a global IT firm offering custom software development, AI, data analytics, cloud consulting, and IT staff augmentation, delivering tailored, innovative solutions with a focus on quality and compliance.”
Royal Cyber
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**Company Overview:** Royal Cyber Inc is a prominent technology solutions provider located in Naperville, IL, and recognized as one of North America's leaders in the field. We drive innovation through our Digital Transformation Studio, which offers extensive digital engineering and industry knowledg
Highlights
250-999
Employees
Naperville, Illinois, Us
Services Provided+6 Services
10% E-Commerce Development
6% Mobile App Development (iOS & Android)
6% ERP & CRM Development
3% Legacy System Modernization
AI Summary
“Royal Cyber is a leading technology solutions provider offering expertise in digital transformation, eCommerce, AI, cloud services, UX design, and managed IT support, serving global clients with innovative, integrated solutions.”
Ficode Technologies Limited
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Ficode Technologies Limited is a prominent custom software development firm in the UK, headquartered in Sutton Coldfield, Birmingham, with an offshore development team based in India. Since its establishment in 2013, the company has been providing IT solutions across various industries, focusing on
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Birmingham, England, Gb
Services Provided+7 Services
13% Custom Web Application Development
10% Mobile App Development (iOS & Android)
8% Backend Development
8% Frontend Development
AI Summary
“Ficode Technologies Limited delivers custom software, mobile apps, web development, and IoT solutions globally, blending advanced technologies with quality, innovation, and certified expertise since 2013.”
Byteplexure
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Kickstart your product and accelerate your launch with our software development expertise. Whether you're creating your initial MVP or developing a comprehensive product, we’re here to assist you throughout every stage of your growth journey.
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Pune, Maharashtra, In
Services Provided+4 Services
15% Custom Web Application Development
10% Mobile App Development (iOS & Android)
5% E-Commerce Development
10% Backend Development
AI Summary
“Byteplexure specializes in software development, supporting clients from MVP creation to full-scale product launches, providing expertise to accelerate growth at every development stage.”
Hashnaut
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Welcome to Hashnaut, your reliable ally for high-quality IT services and consulting. Our team of skilled professionals focuses on providing innovative solutions that assist businesses of all sizes in optimizing their operations, boosting productivity, and reaching their objectives. We offer a wide r
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+11 Services
5% Frontend Development
7% Backend Development
5% API Development & Integration
4% Legacy System Modernization
AI Summary
“Hashnaut offers comprehensive IT services including consulting, software development, cloud computing, and cybersecurity, delivering tailored solutions to optimize business operations and enhance productivity.”
PICWA
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Founders AJ Sahni and Dhaval Gadhvi began their careers as freelancers, collaborating with several funded startups. They encountered significant challenges in finding development partners that were flexible, growth-oriented, and agile enough to collaborate effectively with fast-paced funded startups
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Auckland, Auckland, Nz
Services Provided+5 Services
4% Legacy System Modernization
15% Custom Web Application Development
10% Mobile App Development (iOS & Android)
5% ERP & CRM Development
AI Summary
“PICWA, founded in 2016, specializes in agile digital product development and cost-effective RPA solutions, empowering funded startups and mid-sized enterprises to accelerate growth efficiently.”
I
iQuasar Staffing
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iQuasar, drawing inspiration from ISO-9001 standards, provides high-quality professionals in various industries throughout the US. With more than 20 years of experience in staffing, we deliver budget-friendly solutions, filling specialized positions at 60% less cost than bigger competitors. Our comm
Highlights
250-999
Employees
Sterling, Virginia, Us
Services Provided+6 Services
14% Custom Web Application Development
6% Legacy System Modernization
8% IT Helpdesk & Support Services
4% Disaster Recovery & Business Continuity Planning
AI Summary
“iQuasar Staffing delivers cost-effective, high-quality staffing solutions across diverse industries in the US, leveraging over 20 years of experience and ISO-9001 standards to ensure precise, timely placements.”
IdeaSolved
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IdeaSolved is a prominent technology solutions provider with more than a decade of experience and a solid record of achievement. We focus on various services, including website development, mobile app development, UI design, digital automation, AI solutions, CRM/ERP implementation, digital strategy,
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Richmond, British Columbia, Ca
Services Provided+9 Services
10% Custom Web Application Development
8% Mobile App Development (iOS & Android)
5% API Development & Integration
3% SaaS Product Development
AI Summary
“IdeaSolved delivers comprehensive technology solutions including web and mobile development, AI integration, digital strategy, and automation, ensuring customized, efficient, and scalable outcomes with high client satisfaction.”
G
GeoLens Technology
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GeoLens Technology is a provider of enterprise technology solutions designed to assist businesses in their growth through customized software development, AI-driven solutions, cloud deployment, IT support, SEO and marketing, as well as expert consulting services. They cater to industries such as pha
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Vadodara, Gujarat, In
Services Provided+7 Services
8% Mobile App Development (iOS & Android)
4% E-Commerce Development
11% Custom Web Application Development
3% Legacy System Modernization
AI Summary
“GeoLens Technology delivers customized software, AI solutions, cloud services, and consulting to diverse industries, enhancing business operations and fostering growth through specialized digital innovations.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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