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

Evizi
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EVIZI boasts a substantial team of technical specialists in Vietnam who are proficient in modern software development tools and methodologies. Whether you're looking for comprehensive end-to-end development services, black box or white box testing, ongoing engineering support, professional services,
Highlights
$50,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Vn
Services Provided+6 Services
15% QA & Software Testing
15% Mobile App Development (iOS & Android)
15% Custom Development
10% AR/VR & Mixed Reality Services
AI Summary
“Evizi excels in Software Development with capabilities in Mobile App Development, Custom Web Application Development, E-Commerce Development, and Legacy System Modernization, serving diverse industries with scalable and modern solutions.”
Fulkrum Studio
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Fulkrum provides four key service areas: creative design, website development, application development, and digital marketing. We are a dynamic creative marketing and technology studio made up of strategists, designers, developers, artists, writers, illustrators, photographers, and animators. Our te
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Auburn Hills, Michigan, Us
Services Provided+36 Services
6% Custom Web Application Development
3% E-Commerce Development
3% API Development & Integration
2% SaaS Product Development
AI Summary
“Fulkrum Studio is a dynamic creative marketing and technology firm offering integrated services in design, development, and digital marketing to create engaging brand experiences.”
Salzer Technologies LLC
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Salzer Technologies LLC is a technology services firm based in the UAE that specializes in comprehensive custom software development, system integration, and managed IT services. We assist organizations in various sectors in modernizing their IT environments, enhancing operational efficiency, and sp
Highlights
$100,000+
Min Project Size
< $25/hr
Avg Hourly Rate
250-999
Employees
Herndon, Virginia, Us
Services Provided+15 Services
4% Mobile App Development (iOS & Android)
3% E-Commerce Development
6% Legacy System Modernization
8% API Development & Integration
AI Summary
“Salzer Technologies LLC, UAE-based, delivers custom software, AI, cloud, and IT managed services across industries, emphasizing security, scalability, and Microsoft expertise for digital transformation.”
djangsters GmbH
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We turn IT projects into enjoyable experiences rather than intimidating ones! djangsters GmbH is an IT consulting firm based in Cologne, Germany. Founded in 2013, we initially specialized in web development using Python and Django, which inspired our name. Over the years, we have expanded our team a
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
15% Custom Web Application Development
10% API Development & Integration
5% Legacy System Modernization
3% QA & Software Testing
AI Summary
“djangsters GmbH is a Cologne-based IT consulting firm specializing in comprehensive web development, backend, frontend, databases, DevOps, and infrastructure services since 2013.”
Streamline social
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Streamline Social is a software design and engineering firm dedicated to creating new opportunities for clients of all sizes, from Fortune 500 companies to startups. We develop web and mobile solutions that integrate AI and data elements to enhance customer key performance indicators (KPIs). Our app
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
San Francisco, California, Us
Services Provided+5 Services
15% Custom Web Application Development
15% Mobile App Development (iOS & Android)
3% Legacy System Modernization
17% Product UX Strategy
AI Summary
“Streamline Social is a software engineering firm crafting AI-driven web and mobile solutions that enhance client KPIs through consumer-focused research and rapid prototyping across diverse digital ecosystems.”
Acespera Systems
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Established in 2019 by experienced IT professionals, our goal is to "Provide value to our clients through high quality, excellent service, and the lowest overall ownership costs." Our vision includes the services we offer, which also encompass support for clients using Salesforce and NetSuite, as we
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Pune, Maharashtra, In
Services Provided+5 Services
13% ERP & CRM Development
10% Custom Web Application Development
2% Legacy System Modernization
9% Other IT Consulting and SI
AI Summary
“Acespera Systems, founded in 2019, delivers comprehensive IT solutions including ERP/CRM development, cloud consulting, AI automation, legacy modernization, and customer support outsourcing to diverse industries.”
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Skeema
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Skeema is a plugin for Figma and a development tool that links UI design with API documentation. It associates each design element in Figma with a specific API endpoint, providing access only to the pertinent API documentation. This saves frontend developers from having to sift through countless Swa
Highlights
2-9
Employees
Services Provided+2 Services
40% API Development & Integration
10% Legacy System Modernization
13% AI Strategy & Roadmap Consulting
13% Custom AI Chatbot Development
AI Summary
“Skeema integrates UI design with API documentation via a Figma plugin, enhancing team collaboration, precision, and development speed through backend validation and API analysis tools.”
GeekPeek Software and Technology
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We are a software company located in Jodhpur, Rajasthan, India, but our reach is global as we consider ourselves citizens of the world. At GeekPeek, we blend entrepreneurship with expertise in development, quality assurance, project management, and design. Our skilled team is dedicated to delivering
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Jodhpur, Rajasthan, In
Services Provided+4 Services
10% Mobile App Development (iOS & Android)
5% Legacy System Modernization
13% Custom Web Application Development
5% E-Commerce Development
AI Summary
“GeekPeek Software and Technology is a Jodhpur-based global software company offering expertise in development, quality assurance, project management, and design to deliver high-quality client solutions.”
Wise Accelerate
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Wise Accelerate is an expanding technology partner that provides impactful software development and AI-based solutions to clients worldwide. We create robust engineering teams that assist businesses in scaling effectively, updating their systems, and speeding up digital transformation. Our company c
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Hanoi, Vn
Services Provided+17 Services
9% Custom Web Application Development
3% QA & Software Testing
6% Legacy System Modernization
3% Code Review & Technical Audits
AI Summary
“Wise Accelerate is a global technology partner delivering software development and AI solutions, fostering engineering excellence and driving clients' digital transformation with collaborative, ownership-driven teams.”
Lamanify Web Services
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Welcome to Lamanify Web Services, your leading web design agency in Malaysia. Based in the vibrant city of Mont Kiara, Kuala Lumpur, we are committed to making a difference both locally and across the nation. Proudly recognized as one of the top web designers in the area, we provide businesses with
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Kuala Lumpur, My
Services Provided+4 Services
21% Custom Web Application Development
4% Legacy System Modernization
10% Product UX Strategy
9% UX Research & Usability Testing
AI Summary
“Lamanify Web Services, a top Malaysian web design agency in Kuala Lumpur, crafts distinctive, SEO-optimized websites enhancing brand engagement, functionality, and business growth through expert development.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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