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

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Cloud BIt Solution
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Cloud Bit Solutions is a prominent IT software development firm that provides innovative digital solutions to startups, small and medium-sized enterprises (SMEs), and large corporations across the globe. Our expertise lies in custom software development, web and mobile application development, UI/UX
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+3 Services
10% Custom Web Application Development
8% Mobile App Development (iOS & Android)
7% API Development & Integration
5% E-Commerce Development
AI Summary
“Cloud Bit Solutions specializes in custom software, web and mobile development, UI/UX design, and IT consulting, delivering innovative, scalable digital solutions to diverse global clients.”
UIUX Studios
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At UIUX Studios, we strategically create appealing and functional mobile/web applications for both B2B and B2C markets while enhancing usability. As a UX/UI design and mobile app development agency with marketing expertise, we understand that every aspect affecting the end user is integral to the de
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Panchkula, Haryana, In
Services Provided+23 Services
5% Frontend Development
3% QA & Software Testing
5% Backend Development
1% Legacy System Modernization
AI Summary
“UIUX Studios specializes in creating user-centered mobile and web applications through strategic design, development, and digital marketing, delivering scalable, intuitive solutions across B2B and B2C markets.”
Hartley Lab
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Our goal is to equip you with the skills necessary to thrive and excel in the digital era.
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Pune, Maharashtra, In
Services Provided+19 Services
10% Custom Web Application Development
5% QA & Software Testing
4% Legacy System Modernization
5% Mobile App Development (iOS & Android)
AI Summary
“Hartley Lab specializes in empowering individuals with essential skills to succeed and advance in the digital age through comprehensive educational solutions.”
Weavik
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Top-Tier Custom Software Solutions. Proudly Canadian. Tailored for Your Business. Weavik excels at transforming innovative concepts into award-winning software and products, helping businesses succeed in the current digital era. We assist companies in harnessing technology to optimize operations, e
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+14 Services
5% Custom Web Application Development
4% Mobile App Development (iOS & Android)
5% API Development & Integration
4% Legacy System Modernization
AI Summary
“Weavik, a Canadian firm, delivers custom software solutions including cloud apps, AI-driven automation, data analytics, and system integration, enabling business growth through tailored technology innovation.”
Witmates Technologies Pvt Ltd
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WitMates is a collective of talented individuals focused on bringing your ideas and vision to life. Our motto is "Your Idea, Our Innovation!" As an information technology service provider, we assist aspiring entrepreneurs in transforming their ambitious concepts into state-of-the-art products. Clien
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Indore, Madhya Pradesh, In
Services Provided+10 Services
3% Blockchain & Web3 Development
2% Legacy System Modernization
5% Frontend Development
5% Backend Development
AI Summary
“Witmates Technologies Pvt Ltd delivers custom software, AI-powered automation, and robust cloud infrastructure services, transforming client ideas into innovative, scalable solutions across multiple industries with technical expertise.”
avowline
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AVOWLINE, a website design and development firm located in Bikaner, Rajasthan, is dedicated to precision in our work. Our commitment to accuracy and thoughtful consideration is likely what keeps our clients returning to us time and again.
Highlights
2-9
Employees
Bikaner, Rajasthan, In
Services Provided+13 Services
10% Custom Web Application Development
6% Mobile App Development (iOS & Android)
4% E-Commerce Development
3% ERP & CRM Development
AI Summary
“AVOWLINE is a Bikaner-based website design and development firm known for its precision and commitment, fostering strong client loyalty through accurate and thoughtful solutions.”
Arckipel
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Welcome to Arckipel, where our motto "Everything is Interaction" shapes our philosophy. We are committed to designing digital experiences that enhance user engagement with technology, ensuring that every interaction is both intuitive and meaningful. At Arckipel, we value the power of interconnectedn
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Tallinn, Harju, Ee
Services Provided+17 Services
5% Mobile App Development (iOS & Android)
3% Legacy System Modernization
5% API Development & Integration
4% ERP & CRM Development
AI Summary
“Arckipel designs secure, scalable digital experiences emphasizing user engagement and sustainability, combining advanced technology with transparent communication to enhance business processes across diverse sectors.”
Codres Sp. z o.o.
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Codres is an agile software development firm focused on creating customized web and mobile applications, as well as tailored IT systems for businesses of various sizes. We prioritize the delivery of high-quality, scalable, and efficient solutions, accompanying our clients throughout their digital jo
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+7 Services
15% Custom Web Application Development
13% Mobile App Development (iOS & Android)
8% API Development & Integration
3% Legacy System Modernization
AI Summary
“Codres Sp. z o.o. specializes in custom web and mobile software development, cloud services, AI integration, and e-commerce solutions, delivering scalable, client-focused digital products and ongoing support.”
TechWize
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Our objectives are:
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Tel Aviv-Yafo, Il
Services Provided+15 Services
3% Frontend Development
3% Legacy System Modernization
3% Backend Development
3% Custom Web Application Development
AI Summary
“TechWize delivers comprehensive technology solutions, including software development, UI/UX design, branding, digital marketing, IT infrastructure, cybersecurity, and AI-driven automation to enhance business performance.”
Invertio solutions pvt ltd
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We operate like a finely tuned machine, integrating high standards, innovative ideas, and effective outcomes into every project we handle. When you partner with us, you’re not just receiving software; you’re gaining a powerful combination that achieves results, impresses, and turns your objectives i
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+9 Services
5% Mobile App Development (iOS & Android)
4% E-Commerce Development
2% Legacy System Modernization
4% QA & Software Testing
AI Summary
“Invertio Solutions Pvt Ltd integrates innovation and high standards to deliver effective software solutions, transforming client objectives into impactful, results-driven outcomes across diverse projects.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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