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.

How this list is built

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

Phyder Mobile Solutions Pvt Ltd
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Phyder is a prominent Mobility Solutions Company based in Mumbai, India, with an additional office in Hong Kong. It operates as a division of CMSS India Pvt. Ltd. Since 2012, we have been offering innovative products and services to our valued clients. Our team consists of over 40 skilled and experi
Highlights
250-999
Employees
Mumbai, Maharashtra, In
Services Provided
60% Mobile App Development (iOS & Android)
30% Custom Web Application Development
10% Legacy System Modernization
AI Summary
“Phyder Mobile Solutions Pvt Ltd, a division of CMSS India, offers innovative mobility products and services with a skilled team, delivering rapid growth and broad geographic reach since 2012.”
Efumo
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Efumo is an IT consulting and software development firm based in Latvia that specializes in creating, maintaining, and enhancing sophisticated digital systems for businesses and public sector organizations. We position ourselves as a long-term technology collaborator instead of just a short-term ser
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Riga, Lv
Services Provided+3 Services
13% Custom Web Application Development
10% API Development & Integration
5% E-Commerce Development
17% Legacy System Modernization
AI Summary
“Efumo is a Latvian IT consulting and software development firm specializing in managing, modernizing, and integrating complex digital business systems with scalable, maintainable architectures.”
Arven
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
At Arven, we provide customized IT consulting and outsourcing services that grow alongside your business. Our skills include developing bespoke software, creating user-friendly web applications, and building secure, high-performance SaaS platforms, all backed by strong database architecture. We assi
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Buenos Aires, Ar
Services Provided+1 Services
13% API Development & Integration
25% Custom Web Application Development
12% Legacy System Modernization
30% IT Staff Augmentation
AI Summary
“Arven offers bespoke IT consulting, software development, web applications, SaaS platforms, business analytics, software testing, and cybersecurity services to support scalable business growth.”
Expericia Technologies
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Expericia Technologies creates secure and scalable enterprise solutions, including SharePoint intranets and document management systems (DMS), Salesforce CRM and automation, eCommerce platforms on Adobe Commerce (Magento), Shopify, and WooCommerce, as well as Sitefinity CMS and .NET applications/API
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
25% E-Commerce Development
20% Backend Development
15% Software Development Services
15% Legacy System Modernization
AI Summary
“Expericia Technologies delivers secure, scalable enterprise solutions including SharePoint intranets, Salesforce CRM, eCommerce platforms, Sitefinity CMS, and custom .NET applications with clear SOWs and reliable support.”
Kansoft
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Kansoft is a worldwide partner in digital transformation and AI-led engineering, assisting mid-to-large enterprises in moving from outdated technology environments to scalable, AI-ready digital platforms. Founded in 2008, Kansoft aids organizations across various sectors, including healthcare, manuf
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Udaipur, Rajasthan, In
Services Provided+8 Services
13% Custom Web Application Development
8% Mobile App Development (iOS & Android)
15% AI Agent & Multi-Agent System Development
15% Legacy System Modernization
AI Summary
“Kansoft delivers AI-led digital transformation, specializing in custom software, cloud consulting, enterprise modernization, and data-driven solutions to enhance operational efficiency across diverse industries globally.”
Trinetix
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Trinetix is a reliable partner in digital products for renowned companies and rapidly growing businesses around the world. We enable visionary leaders to transform impactful ideas into digital realities through collaboration, creativity, and innovation. Our teams are dedicated to expanding the limit
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
250-999
Employees
Nashville, Tennessee, Us
Services Provided+1 Services
27% Custom Web Application Development
7% Legacy System Modernization
33% Robotic Process Automation (RPA)
13% Wireframing & Prototyping
AI Summary
“Trinetix partners globally to transform innovative ideas into impactful digital products, fostering creativity, collaboration, and solutions that drive positive change and future opportunities.”
TYM
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
TYM is a Spanish technology consultancy established in 1997, focusing on applied artificial intelligence, process automation, and the integration of enterprise systems. We create and implement production-ready AI solutions, such as conversational agents, voice AI applications, and regulatory complia
Highlights
$10,000+
Min Project Size
10-49
Employees
Services Provided+8 Services
4% AI Strategy & Roadmap Consulting
4% Custom AI Chatbot Development
3% Machine Learning Model Development
5% Robotic Process Automation (RPA)
AI Summary
“TYM is a Spanish consultancy specializing in applied AI, process automation, and enterprise system integration, delivering scalable, production-ready solutions across banking, media, and pharmaceuticals.”
V
Vuroom Technologies
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Vuroom Technologies is a Toronto-based company that offers website and custom software development, along with consulting services.
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
Toronto, Ontario, Ca
Services Provided
30% API Development & Integration
50% Custom Web Application Development
20% Legacy System Modernization
AI Summary
“Vuroom Technologies, based in Toronto, specializes in website and custom software development, complemented by consulting services to support diverse business technology needs.”
ApricusIT
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
ApricusI helps businesses streamline the process of validating their ideas and transforming the most promising ones into reality. We offer experienced tech professionals, expertise in software product development, and comprehensive proof-of-concept (PoC) services. Our skill set encompasses migration
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Tallinn, Harju, Ee
Services Provided
40% Custom Web Application Development
10% Legacy System Modernization
30% Cloud Consulting & SI
20% Other IT Consulting and SI
AI Summary
“ApricusIT partners with businesses to validate and realize ideas through expert software development, PoC services, CMS migrations, and creating composable digital experience platforms for data-driven marketing.”
The Hundred10
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
The Hundred10 is a company focused on high-level talent and minimal overhead in product development, cloud solutions, and application modernization. We excel in taking products from initial concept to market launch. Whether acting as the product owner, steering the product to align with your busines
Highlights
$100,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Vancouver, British Columbia, Ca
Services Provided+2 Services
10% Mobile App Development (iOS & Android)
14% Legacy System Modernization
10% Custom Web Application Development
33% Cloud Consulting & SI
AI Summary
“The Hundred10 delivers expert product development, cloud solutions, and application modernization with ownership focus, partnering with AWS, Azure, and GCP to bring products from concept to market.”

...

...

...

Latest insights & expert perspectives

Explore data-backed surveys with inputs from top industry experts.

Stated minimum project sizes among the firms listed under software development services on Edverise, with the $50,000 band shaded

Vendor Selection

Questions to Ask a Software Development Agency: Six With Proof

A vetting script for second-round agency calls: six questions, the document each answer has to produce, and what a directory listing or a badge really proves.

Nihar Ranjan Rout

10/31/2026

Three software development quotes of $38,000, $94,000 and $210,000 converted to effective hourly rates of $79, $73 and $87.50

Vendor Selection

How to Compare Software Development Quotes Priced 5x Apart

Three bids for the same build are rarely comparable as written. A normalization checklist, a weighted grid adapted from FAR Part 15.3, and the hourly arithmetic.

Akash Mohapatra

10/31/2026

Chart of minimum project size stated by firms listed under AI agent development on Edverise, with the $50,000 band highlighted

Vendor Selection

AI Agent Development Cost: Build, Tokens, Reliability

An AI agent has three costs. Compute the monthly token bill from published list prices, then set the build quote against what listed firms actually charge.

Santanu Prasad Sahoo

10/31/2026

Check All Our Blogs

One Platform. One Promise. One Trust.

Edverise is building the trusted way to find tech vendors. List your company early, or talk to us about backing the platform.

Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

V

Where buyers look next

Latest insights & expert perspectives

Questions to Ask a Software Development Agency: Six With Proof

How to Compare Software Development Quotes Priced 5x Apart

AI Agent Development Cost: Build, Tokens, Reliability

One Platform. One Promise. One Trust.