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

ICterra
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
ICterra is a dedicated partner in software engineering for safety-critical and business-essential software systems and solutions. Established in 1991 as an R&D center under Siemens in Turkey, we transitioned to become ICterra following a management buyout in 2013. Our goal is to enhance our customer
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Ankara, Tr
Services Provided+5 Services
5% Custom Web Application Development
4% Mobile App Development (iOS & Android)
10% Backend Development
5% Frontend Development
AI Summary
“ICterra delivers certified software engineering solutions across safety-critical sectors like healthcare, avionics, and energy, specializing in embedded systems, cybersecurity, and legacy modernization.”
S
Soliton Technologies Pvt Ltd
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Soliton Technologies Pvt. Ltd., a high-tech software firm based in Bangalore, India, collaborates with companies worldwide, ranging from startups to Fortune 500 firms. It serves various sectors, such as semiconductors, medical devices, automotive, Industry 4.0, and robotics, to enhance their competi
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
250-999
Employees
Bengaluru, Karnataka, In
Services Provided+1 Services
18% Legacy System Modernization
15% QA & Software Testing
14% Generative AI
20% AI Model Fine-Tuning & Training
AI Summary
“Soliton Technologies Pvt. Ltd. is a Bangalore-based high-tech software firm providing digital transformation services across industries like semiconductors, medical devices, automotive, and robotics globally.”
Inviqon
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Inviqon serves as a technical partner for expanding companies that require software tailored to their actual operations. We collaborate with businesses to create systems that align with their operational needs and evolution. Our focus goes beyond merely providing software; we aim to assist in develo
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
35% Custom Web Application Development
15% Legacy System Modernization
28% Cloud Consulting & SI
22% AI Strategy & Roadmap Consulting
AI Summary
“Inviqon partners with growing companies to develop customized software solutions that align with their operational needs, ensuring reliable systems supporting sustainable growth and evolution.”
Hansel & Baum Group (H&BG)
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
We specialize in frontend development, providing a variety of services that encompass front-end application development and the complete design and development of full-stack and mobile applications from the ground up.
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Warszawa, Masovian, Pl
Services Provided
30% Mobile App Development (iOS & Android)
60% Frontend Development
10% Legacy System Modernization
AI Summary
“Hansel & Baum Group (H&BG) specializes in frontend development, delivering comprehensive front-end, full-stack, and mobile application design and development services from inception to deployment.”
Calibec
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Optimize your processes, consolidate your information, and enhance team efficiency with tailored solutions designed to expand alongside your business.
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Mission Viejo, California, Us
Services Provided
13% Mobile App Development (iOS & Android)
12% Legacy System Modernization
25% Custom Web Application Development
50% Cloud Consulting & SI
AI Summary
“Calibec offers customized solutions that streamline processes, centralize information, and boost team productivity, supporting scalable growth for businesses across various sectors.”
Vratislavia Software Sp. z o.o.
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Vratislavia Software is a software development firm focused on crafting innovative solutions. We specialize in creating custom software and offering dedicated developer teams for digital agencies, startups, and tailored software projects. As a small company, we value every project and dedicate our u
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Pl
Services Provided+2 Services
40% Software Development Services
20% Other IT Consulting and SI
10% Legacy System Modernization
10% IT Staff Augmentation
AI Summary
“Vratislavia Software specializes in custom software development and dedicated developer teams, delivering tailored technology solutions that optimize business processes for startups, agencies, and logistics firms.”
Insyte Consultancy Services
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Insyte Consultancy Services, located in the USA and equipped with both domestic and international delivery options, offers comprehensive software solutions for Mobility/Tablet and Web Application Development. Our developers combine innovative thinking with technology to provide integrated, reliable,
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Riverwoods, Illinois, Us
Services Provided
60% Mobile App Development (iOS & Android)
30% Custom Web Application Development
10% Legacy System Modernization
AI Summary
“Insyte Consultancy Services delivers innovative, scalable software solutions and offshore development with technology consulting, specializing in Mobility, Tablet, and Web Application Development across domestic and international markets.”
Havooz ICT Services
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Havooz ICT Services Ltd. offers cost-effective solutions for large-scale data processing and storage across various industries. We provide technical assistance for establishing and managing both private and public clouds using open-source distributed frameworks such as Hadoop and Hive. Along with en
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
25% BI & Big Data Consulting & SI
25% BI & Big Data Consulting & SI
35% Custom Web Application Development
15% Legacy System Modernization
AI Summary
“Havooz ICT Services provides cost-effective, scalable data processing and storage solutions, leveraging open-source cloud frameworks to support diverse industries and accelerate application deployment.”
Information Integration Group, Inc.
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
As a prominent independent software vendor (ISV) in North America, IIG takes pride in its 23 years of outstanding service to clients across the manufacturing and distribution sectors, as well as in the apparel, rental, and field services industries nationwide. So far, IIG’s skilled in-house programm
Highlights
10-49
Employees
Services Provided
5% Mobile App Development (iOS & Android)
15% Legacy System Modernization
30% Custom Web Application Development
50% ERP Consulting and SI
AI Summary
“Information Integration Group, Inc. delivers tailored ERP and business management software with 23 years' experience, supporting diverse industries and offering Sage and NetSuite cloud solutions.”
Company A
View Profile Visit Website
Is this your business? Become an Edverise partner & Claim Now
Company A specializes in custom application development, crafting products and services that help brands and organizations adapt to the digital landscape. With our expertise, we design immersive experiences that enhance brand identities and drive business growth. We develop top-tier enterprise solut
Highlights
$50,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Irvine, California, Us
Services Provided+3 Services
25% Custom Web Application Development
10% Mobile App Development (iOS & Android)
10% Legacy System Modernization
5% QA & Software Testing
AI Summary
“Company A delivers custom software, mobile apps, cloud consulting, and IT staff augmentation, combining modernization and strategy to drive digital transformation and business growth across industries.”

...

...

...

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

S

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.