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

AntIT - Mobile Development Company
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Established in 2015, Antit is a mobile development firm focused on creating minimum viable products (MVPs) and products aimed at quick market entry (TTM), particularly within the FinTech sector. The company excels in designing and swiftly implementing innovative solutions, especially for complex and
Highlights
$100,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
San Jose, San Jose, Cr
Services Provided
60% Mobile App Development (iOS & Android)
10% Blockchain & Web3 Development
20% Custom Web Application Development
10% Legacy System Modernization
AI Summary
“AntIT is a rapidly growing mobile development firm specializing in fast, innovative MVPs and market-ready solutions, notably in FinTech, leveraging deep technical expertise for digital transformation.”
B
Backswood
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Services for system design and software development
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
15% Mobile App Development (iOS & Android)
15% E-Commerce Development
20% Legacy System Modernization
25% UX Research & Usability Testing
AI Summary
“Backswood specializes in comprehensive system design and software development services, delivering tailored technological solutions to meet diverse business needs effectively and efficiently.”
Lemonova
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
A completely remote team of experts is engaged in international projects related to Java, Python, PHP, and related technologies. We are passionate about designing, developing, and maintaining medium to large-scale web applications and software solutions, leveraging our extensive expertise in craftin
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Szczecin, West Pomeranian, Pl
Services Provided+1 Services
50% Custom Web Application Development
10% Mobile App Development (iOS & Android)
10% E-Commerce Development
15% QA & Software Testing
AI Summary
“Lemonova is a fully remote expert team specializing in Java, Python, and PHP, delivering innovative, medium to large-scale web applications and software integration solutions worldwide.”
Novus Core Tech
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
High-Performance Software Architecture and Engineering Novus Core Tech is a dedicated software engineering company headed by CEO and Lead Architect Jesus Navas. We collaborate with global businesses to create scalable architectures, update outdated systems, and develop high-performance web applicati
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
25% Custom Web Application Development
15% API Development & Integration
20% Legacy System Modernization
25% SaaS Product Development
AI Summary
“Novus Core Tech specializes in high-performance software architecture and engineering, offering tailored consultancy, agile team management, and modern full-stack development for global clients.”
Lightsail
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Introducing Lightspace: a user-friendly and intelligent safety management system developed by the Lightsail team. Lightspace enhances workplace safety while reducing costs. It streamlines your responsibilities throughout the safety process—from toolbox meetings to managing issues and more. Say goodb
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
North Geelong, Victoria, Au
Services Provided+1 Services
35% Custom Web Application Development
15% Mobile App Development (iOS & Android)
10% Legacy System Modernization
25% Backend Development
AI Summary
“Lightsail develops Lightspace, an intelligent safety management system that streamlines workplace safety tasks, reduces risks, and enhances operational efficiency across industries.”
Solutionary
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Solutionary offers a contemporary method for software development tailored to your business needs. Our network comprises highly skilled software engineers, web developers, DevOps specialists, and UI/UX designers who are recognized leaders in their fields. We look forward to demonstrating how we can
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Philadelphia, Pennsylvania, Us
Services Provided
45% Custom Web Application Development
40% Mobile App Development (iOS & Android)
15% Legacy System Modernization
AI Summary
“Solutionary delivers tailored software development services through a skilled network of engineers, developers, DevOps experts, and UI/UX designers to support diverse business needs.”
PROBEGIN
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
With delivery hubs located in Ukraine and the Netherlands, we create, develop, and support cutting-edge software solutions that assist businesses in achieving their objectives, generating significant value, and maintaining a competitive edge. We offer valuable services to clients in Western Europe a
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Lelystad, Flevoland, Nl
Services Provided+1 Services
20% Custom Web Application Development
10% Mobile App Development (iOS & Android)
13% E-Commerce Development
7% Legacy System Modernization
AI Summary
“PROBEGIN delivers tailored software development and integration services from hubs in Ukraine and the Netherlands, supporting diverse sectors with agile, high-quality solutions and strong client partnerships.”
DRS Software
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We are a specialized software development and consulting company dedicated to high-performance web applications, data analytics, and application modernization. With expert knowledge in WebAssembly and the latest web technologies, we deliver transformative solutions to intricate development and moder
Highlights
$10,000+
Min Project Size
2-9
Employees
Leeds, England, Gb
Services Provided
35% Custom Web Application Development
15% Legacy System Modernization
20% AI Strategy & Roadmap Consulting
30% BI & Big Data Consulting & SI
AI Summary
“DRS Software specializes in high-performance web applications, data engineering, and legacy modernization, delivering expert, flexible solutions utilizing advanced technologies like WebAssembly since 2015.”
Appelian Software
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Assisting startup founders in transforming an excellent idea into a prototype twice as quickly, and subsequently developing that prototype into a market-ready product.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Tbilisi, Tbilisi, Ge
Services Provided
45% Mobile App Development (iOS & Android)
45% Custom Web Application Development
10% Legacy System Modernization
AI Summary
“Appelian Software specializes in accelerating startup growth by rapidly developing prototypes and advancing them into market-ready products, enabling efficient transformation of innovative ideas.”
Hodfords
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Established in 2000, Hodfords provides solutions by acting as your in-house digital team or by supplying skilled engineers to enhance your existing team or offer software development teams as required. Reputable brands such as Lenovo, Ben & Jerry’s, and Experian trust us with their software projects
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Hong Kong, Hk
Services Provided+1 Services
30% Custom Web Application Development
15% Mobile App Development (iOS & Android)
20% API Development & Integration
15% Legacy System Modernization
AI Summary
“Hodfords, a Hong Kong-based firm since 2000, delivers custom software, mobile, AR/VR, and AI solutions with experienced global developers, serving top brands flexibly and reliably.”

...

...

...

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

B

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.