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

KAVOBITS LLP
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KAVObits LLP is a company specializing in product development, engineering, and consulting services, catering to mid-sized and large enterprises. We provide adaptable offshore services from our development center located in Ahmadabad, India. KAVObits has established strong client connections with a
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+4 Services
10% Mobile App Development (iOS & Android)
13% Custom Web Application Development
5% E-Commerce Development
5% Legacy System Modernization
AI Summary
“KAVObits LLP delivers comprehensive software development, engineering, and consulting services from India, serving diverse sectors with tailored, cost-effective solutions across the full software lifecycle.”
Zero21
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We assist entrepreneurs in turning their ideas into software solutions that meet market demands and generate revenue. Our comprehensive A to Z service caters to entrepreneurs and startups, thanks to our exceptional team of product managers, UI/UX specialists, and engineers. Our approach includes: sp
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Tel Aviv-Yafo, Il
Services Provided+2 Services
23% Mobile App Development (iOS & Android)
25% Custom Web Application Development
2% Legacy System Modernization
20% Product UX Strategy
AI Summary
“Zero21 is an Israeli company offering end-to-end services including product research, UI/UX design, and software development to transform entrepreneurial ideas into market-ready digital solutions.”
KogniVera IT solutions Pvt,Ltd
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KogniVer is a worldwide technology consulting and services company that focuses on creating, engineering, and overseeing cutting-edge digital solutions for organizations. With a commitment to client success and high standards, we assist businesses in fast-paced sectors such as retail, e-commerce, fi
Highlights
$100,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Services Provided+2 Services
20% E-Commerce Development
5% Legacy System Modernization
10% Managed IT Services
15% DevOps Engineering
AI Summary
“KogniVera IT Solutions Pvt, Ltd. delivers tailored digital transformation and IT consulting services across industries, enhancing efficiency and customer experience through innovative technologies.”
Outline Systems India Pvt. Ltd.
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Established in 2005, Outline Systems India Pvt. Ltd. entered the industry with the aim of providing valuable IT services and consulting to address diverse business challenges across various sectors. With over 17 years of extensive experience and deep technical expertise, we distinguish ourselves fro
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
250-999
Employees
Manauli, Punjab, In
Services Provided+6 Services
5% Mobile App Development (iOS & Android)
6% Legacy System Modernization
10% Custom Web Application Development
4% E-Commerce Development
AI Summary
“Outline Systems India Pvt. Ltd. delivers comprehensive IT solutions, combining software development, cloud infrastructure, AI, and UX design to drive digital transformation and secure, scalable enterprise growth.”
Dot H Digital Inc.
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Client-focused and results-oriented, we understand that while anyone can create a website, it requires intellect and insight to craft an exceptional online presence. We provide more than just a functional website with attractive graphics; we create a successful internet presence that combines strate
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Mississauga, Ontario, Ca
Services Provided+5 Services
2% Mobile App Development (iOS & Android)
2% Legacy System Modernization
5% E-Commerce Development
3% ERP & CRM Development
AI Summary
“Dot H Digital Inc. delivers tailored, strategic web solutions combining creative design, SEO, and technical excellence, fostering client partnerships for impactful, measurable online success across industries.”
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Metarouge Innovations
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Motivated by our enthusiasm for innovation, 'metarouge' is a global Technology & Development company. Our work philosophy transcends simply utilizing the latest technologies and methods. At 'metarouge', we focus on our clients—their identities, brands, customers, processes, products, and services. W
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Sydney, New South Wales, Au
Services Provided+4 Services
5% Mobile App Development (iOS & Android)
4% E-Commerce Development
5% Legacy System Modernization
11% Custom Web Application Development
AI Summary
“Metarouge Innovations is a global technology and development company focused on creating innovative, user-centric digital products and web solutions tailored to clients' evolving needs.”
App 360
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We are a digital product agency that merges the expertise of a large custom software development team with innovative approaches to product design and the experiences of customers, users, and employees. We emphasize collaboration within multidisciplinary teams, led by subject matter experts working
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Camperdown, New South Wales, Au
Services Provided+4 Services
18% Mobile App Development (iOS & Android)
5% Legacy System Modernization
3% Blockchain & Web3 Development
10% QA & Software Testing
AI Summary
“App 360 is a digital product agency combining software development expertise and innovative design within agile, multidisciplinary teams to deliver advanced applications for startups and enterprises.”
Automly App Development Company
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Automly is a web and mobile app development firm located in Chicago. We provide a comprehensive range of services, including strategy, design, and development. As a full-stack development company, we are dedicated to delivering outstanding service right from the start. We partner with you to create
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
Chicago, Illinois, Us
Services Provided+1 Services
20% Custom Web Application Development
25% Mobile App Development (iOS & Android)
5% Legacy System Modernization
30% Product UX Strategy
AI Summary
“Automly is a Chicago-based full-stack web and mobile app development firm with 12+ years' experience, delivering innovative digital solutions that enhance user experience, productivity, and business growth.”
MobilePundits
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Mobilepundits is a prominent company specializing in custom app development and testing. We have extensive expertise across leading mobile platforms such as iPhone, iPad, Android, Windows Phone, as well as cross-platform technologies like PhoneGap and Sencha Touch. Our quality and processes are ISO
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
8% Custom Web Application Development
30% Mobile App Development (iOS & Android)
10% QA & Software Testing
2% Legacy System Modernization
AI Summary
“MobilePundits specializes in custom mobile app development and testing across major platforms, delivering quality ISO-certified solutions with offshore expertise, serving diverse industries worldwide.”
Launchpad Technologies Inc.
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Launchpad serves as a comprehensive Integration Center for businesses. Our PaasportTM iPaaS hub effortlessly connects, integrates, and automates your various applications. With our Integration Services, you have hourly access to skilled developers who create and maintain your integrations. Our Nears
Highlights
10-49
Employees
Vancouver, British Columbia, Ca
Services Provided+2 Services
12% Backend Development
3% Legacy System Modernization
14% Custom Web Application Development
5% Frontend Development
AI Summary
“Launchpad Technologies offers a cloud-based integration platform and skilled nearshore developer support to connect, automate, and scale business applications efficiently and effectively.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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