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

VenturiX Solutions
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VenturiX Solutions is a forward-thinking custom software development firm that focuses on creating mobile and web solutions. Our goal is to make an impact by transforming innovative ideas into groundbreaking products. We resonate with Jim Carroll's statement, "Think Big, Start Small, Scale Fast." We
Highlights
$10,000+
Min Project Size
50-249
Employees
Sao Paulo, Sao Paulo, Br
Services Provided+6 Services
25% Software Development Services
17% Legacy System Modernization
12% Custom Web Application Development
11% Mobile App Development (iOS & Android)
AI Summary
“VenturiX Solutions specializes in custom mobile, web, embedded, and legacy system software, delivering tailored, innovative solutions that drive business success and scalability.”
Codepaper
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We are a global digital innovation company located in Toronto, dedicated to developing impactful solutions that drive results. As a technology firm, our aim is to assist your brand in overcoming its technological challenges. Codepaper focuses on creating interactive, captivating, and distinctive exp
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Vaughan, Ontario, Ca
Services Provided+1 Services
25% Software Development Services
25% Mobile App Development (iOS & Android)
25% Custom Web Application Development
15% Legacy System Modernization
AI Summary
“Codepaper is a Toronto-based digital innovation company specializing in strategic web and app development, delivering impactful, growth-oriented technology solutions to enhance user engagement and business outcomes.”
Trunexa
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Trunexa is a design firm specializing in embedded systems, IoT, and custom electronics for various businesses and industries. We provide comprehensive design and development services throughout the entire product development lifecycle, including New Product Development, Product Modernization, and Pr
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Montreal, Quebec, Ca
Services Provided
10% Mobile App Development (iOS & Android)
20% Legacy System Modernization
20% Custom Web Application Development
50% IT Staff Augmentation
AI Summary
“Trunexa is a dynamic design firm specializing in embedded systems, IoT, and custom electronics, delivering end-to-end product development and support across diverse industries including transportation and medical devices.”
VividCloud
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We aim to enhance your business with creative cloud software solutions, prioritizing your success above all else. Here's our approach: We create innovative and advanced cloud and IoT software engineering solutions for businesses that require immediate and precise execution. We excel compared to our
Highlights
$50,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
50-249
Employees
Brunswick, Maine, Us
Services Provided+2 Services
25% Software Development Services
25% Internet of Things Services
20% Legacy System Modernization
10% Machine Learning Model Development
AI Summary
“VividCloud delivers innovative cloud and IoT software solutions with a focus on client success, leveraging diverse talent and collaborative partnerships for precise business execution.”
JohnCube
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JohnCube is a software development firm dedicated to creating customized and innovative software solutions. The majority of our team has corporate backgrounds, giving them insights into the workings of large enterprises. Our commitment to effective communication and productivity stems from this expe
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Rybnik, Pl
Services Provided
20% Mobile App Development (iOS & Android)
15% Legacy System Modernization
15% Custom Web Application Development
50% IT Staff Augmentation
AI Summary
“JohnCube delivers customized software solutions with a skilled Polish team, focusing on innovation, diverse technologies, and productivity to optimize business processes and digital transformation.”
DEVEDANOS
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DEVEDANOS supports business leaders seeking consistent weekly progress in their software development within a predictable budget. With a set monthly subscription, you establish your budget in advance. You can observe production results every week and modify priorities as needed. Your primary contact
Highlights
2-9
Employees
Maastricht, Limburg, Nl
Services Provided
65% Custom Web Application Development
25% API Development & Integration
10% Legacy System Modernization
AI Summary
“DEVEDANOS provides predictable, subscription-based software development services across Europe and the UK, ensuring weekly progress, continuous delivery, and quality through automated testing and senior developer guidance.”
CREATEQ
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CREATEQ is a software engineering firm with more than 25 years of experience assisting businesses in high-stakes sectors to develop, modernize, and secure their digital platforms. Our team of over 300 experts, located across seven sites in Eastern Europe and North Africa, combines extensive technica
Highlights
$50-99/hr
Avg Hourly Rate
250-999
Employees
Freienbach, Ch
Services Provided+1 Services
18% Legacy System Modernization
15% Custom Web Application Development
33% DevOps Engineering
22% BI & Big Data Consulting & SI
AI Summary
“CREATEQ is a certified software engineering firm with 25+ years' expertise delivering custom software, legacy modernization, and cybersecurity solutions for regulated, mission-critical industries globally.”
MG
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About Us: We are a company that provides IT services focused on software infrastructure initiatives and software development. Our Customers: If you are dealing with outdated technology, spending excessive time and resources on daily operations, facing disconnected or incompatible systems and appli
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Buenos Aires, Ar
Services Provided
40% API Development & Integration
40% Custom Web Application Development
20% Legacy System Modernization
AI Summary
“MG specializes in IT services, offering software development and infrastructure solutions to optimize operations, integrate systems, and enhance organizational performance monitoring.”
PragmaFlow, Inc
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PragmaFlow was established in early 2020 with the aim of helping development teams adopt a more practical approach to design and development. Our primary team includes developers, testers, copywriters, system experts, and coaches, enabling us to provide comprehensive services from start to finish.
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Longueuil, Quebec, Ca
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% E-Commerce Development
15% Legacy System Modernization
AI Summary
“PragmaFlow, founded in 2020, offers end-to-end development support with a multidisciplinary team of developers, testers, copywriters, system experts, and coaches, promoting practical design and development.”
Technoduces Info Solutions Pvt Ltd
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Technoduces Info Solutions Pvt Ltd is a leading company in Custom Web and Mobile Application Development, offering services and solutions that drive digital transformation. Our dedicated team of over 70 professionals has been operating in the IT sector since 2011. We specialize in custom web and mob
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
P N Pudur, Tamil Nadu, In
Services Provided+1 Services
40% Custom Web Application Development
30% Mobile App Development (iOS & Android)
10% E-Commerce Development
15% Legacy System Modernization
AI Summary
“Technoduces Info Solutions Pvt Ltd, established in 2011, offers custom web and mobile app development, software modernization, and dedicated IT resources across diverse technologies globally.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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