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

Digital Global Information Systems
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Digital Global Information Systems (DGIS) is a tech-driven company that offers IT services and software development, assisting businesses in modernizing, scaling, and operating more efficiently through innovative digital solutions. We focus on custom software development, ERP systems, web and mobile
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+11 Services
10% Mobile App Development (iOS & Android)
3% E-Commerce Development
15% Custom Web Application Development
5% Legacy System Modernization
AI Summary
“Digital Global Information Systems delivers custom IT services and software solutions like ERP, cloud, and mobile apps, empowering startups and SMEs to enhance operations and drive growth.”
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Miller Gold Tech
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We are an Offshore Development Center entirely dedicated to JavaScript, capable of supplying skilled developers on short notice. On average, our team members possess over 7 years of experience in JavaScript, with proficiency in React, Vue, Angular, and Node.js.
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ho Chi Minh City, Ho Chi Minh City, Vn
Services Provided+5 Services
17% Custom Web Application Development
7% Mobile App Development (iOS & Android)
5% E-Commerce Development
5% Legacy System Modernization
AI Summary
“Miller Gold Tech is a specialized Offshore Development Center offering experienced JavaScript developers proficient in React, Vue, Angular, and Node.js for rapid deployment.”
VisualSoft Global
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VisualSoft Global - Your Premier Technology Solutions Partner VisualSoft Global (VS) is a top-tier provider of Custom Software Development, IoT Development, and a wide range of technology solutions, catering to both national and international clients in various industries. We excel at turning compl
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+4 Services
9% QA & Software Testing
20% Custom Web Application Development
5% Legacy System Modernization
9% AI Strategy & Roadmap Consulting
AI Summary
“VisualSoft Global delivers custom software and IoT development through expert teams, enabling businesses worldwide to innovate, reduce costs, and enhance competitiveness with tailored technology solutions.”
Infinodo Technology
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Infinodo is a digital transformation engineering firm dedicated to providing innovative, scalable, and secure software solutions designed for contemporary business demands. We excel in comprehensive product development, which encompasses mobile apps, web platforms, backend systems, UI/UX design, qua
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
15% Custom Web Application Development
13% Mobile App Development (iOS & Android)
10% API Development & Integration
7% E-Commerce Development
AI Summary
“Infinodo Technology specializes in scalable, secure digital transformation solutions, offering end-to-end product development and consulting across diverse industries to accelerate clients' innovation and growth.”
Antya Digital LLP
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Antya Digital offers technology-driven digital marketing solutions, including SEO, AEO, AI search optimization, and ecommerce store optimization. We develop tailored strategies for each client, aligned with their specific digital requirements and objectives.
Highlights
$100-149/hr
Avg Hourly Rate
2-9
Employees
Mumbai, Maharashtra, In
Services Provided+6 Services
8% Custom Web Application Development
14% E-Commerce Development
3% Legacy System Modernization
8% CMS Development & Customization
AI Summary
“Antya Digital LLP specializes in technology-driven digital marketing solutions such as SEO, AEO, AI search optimization, and ecommerce enhancement, delivering tailored strategies aligned with client objectives.”
Addax
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AddaxLab is a comprehensive web and mobile development firm that provides customized, scalable digital solutions for businesses of any size. With more than 15 years of expertise, we focus on complete implementations, customizations, and integrations of top platforms such as Salesforce, HubSpot, and
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Union City, New Jersey, Us
Services Provided+6 Services
10% Custom Web Application Development
8% Mobile App Development (iOS & Android)
5% CRM Consulting and SI
2% Legacy System Modernization
AI Summary
“Addax delivers tailored web and mobile development, CRM and ERP integrations, AI automation, and cloud infrastructure services, empowering scalable digital transformation and optimized business processes across industries.”
Join Solutions
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We specialize in digital engineering, assisting organizations in developing innovative products that prioritize user needs.
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+2 Services
27% Custom Web Application Development
7% Legacy System Modernization
33% IT Staff Augmentation
7% Market Research & Competitive Intelligence
AI Summary
“Join Solutions specializes in digital engineering, delivering innovative, user-centric product development services to help organizations enhance their technology solutions effectively.”
Hormaz Marketing and Brand Consultancy
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Hormaz Marketing and Brand Consultancy (HMBC) is a premier marketing and branding agency based in Mumbai, recognized for its effective solutions, innovative ideas, and client-focused strategy. Although the company was officially established in 2014, its founders bring more than twenty years of exper
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Mumbai, Maharashtra, In
Services Provided+10 Services
16% Mobile App Development (iOS & Android)
4% Legacy System Modernization
8% Product UX Strategy
7% UX Research & Usability Testing
AI Summary
“Hormaz Marketing and Brand Consultancy delivers comprehensive marketing, branding, software development, and UI/UX services, leveraging extensive industry experience to create effective, client-focused digital solutions.”
AGILE DIGITAL TECHNOLOGIES (PVT) LTD
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Agile Digital Technologies provides extensive expertise and a thorough understanding of the industry to assist our clients in addressing the most intricate challenges faced by their Organization/Brand in the digital realm. We aim to elevate customer engagement to new heights. Our services include Cu
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Karachi, Sindh, Pk
Services Provided+8 Services
13% Custom Web Application Development
10% Mobile App Development (iOS & Android)
8% ERP & CRM Development
2% Legacy System Modernization
AI Summary
“Agile Digital Technologies specializes in custom software, mobile and web applications, ERP support, and digital marketing to enhance client engagement and solve complex digital challenges.”
FIN Digital
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FIN Digital is a digital development company dedicated to driving technological disruption. We specialize in creating various solutions, including artificial intelligence, mobile apps, bots, and IoT technologies. Our mission is to enhance existing technology, making it stronger, faster, and smarter.
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Washington, District Of Columbia, Us
Services Provided+8 Services
8% Custom Web Application Development
10% Mobile App Development (iOS & Android)
4% E-Commerce Development
2% Legacy System Modernization
AI Summary
“FIN Digital is a technology-driven company delivering AI, mobile apps, bots, and IoT solutions for startups to Fortune 500s, enhancing digital engagement through innovative, customized designs.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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