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

Agumentik Software Private Limited
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We are the quickest expanding startup in India, specializing in Software design, Website Development, App Development, Animation, Game Designing, and Digital Marketing. We strive for excellence and prioritize quality products and customer satisfaction in our business approach. Our team consists of h
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
17% Custom Web Application Development
14% E-Commerce Development
3% Legacy System Modernization
17% Product UX Strategy
AI Summary
“Agumentik Software Private Limited is a rapidly growing Indian startup offering software design, web and app development, animation, game design, and digital marketing services focused on quality and customer satisfaction.”
DigyCorp
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DigyCorp offers comprehensive managed implementations and assistance in developing your internal capabilities. Our expertise is in Software Development, Cloud, Blockchain, and Data Science. We specialize in crafting tailored digital solutions using exceptionally skilled technical professionals at hi
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+18 Services
5% Legacy System Modernization
4% Frontend Development
6% Backend Development
3% Code Review & Technical Audits
AI Summary
“DigyCorp delivers tailored digital solutions across software development, AI, cloud infrastructure, and data analytics, leveraging skilled professionals to drive efficient, cost-effective client transformations.”
King of CMS Consulting
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Our extensive experience, combined with a team of highly specialized professionals, enables us to effectively manage all aspects of IT solutions to maximize the benefits for your organization.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+5 Services
15% Custom Web Application Development
8% Mobile App Development (iOS & Android)
13% Backend Development
10% Frontend Development
AI Summary
“King of CMS Consulting offers comprehensive IT solutions, specializing in custom web and mobile app development, AI strategy, cloud consulting, and staff augmentation for diverse industries.”
Konnektable Technologies Ltd.
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Konnektable is a software development firm headquartered in the Republic of Ireland, with additional offices in Greece and the USA. We utilize the latest advancements in AI, Machine Learning, IoT, Big Data, and Analytics to create data-driven solutions in Compliance and Business Optimization & Resil
Highlights
10-49
Employees
Belview Port, Ie
Services Provided+15 Services
8% Custom Web Application Development
3% Mobile App Development (iOS & Android)
2% E-Commerce Development
4% Legacy System Modernization
AI Summary
“Konnektable Technologies Ltd. delivers innovative software, AI, UX/UI design, digital marketing, and video production solutions, leveraging advanced technologies to optimize compliance, business resilience, and client growth.”
NexusByte
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NexusByte is a web development and IT solutions company located in Sydney, offering dependable and high-performance digital services to businesses throughout Australia. We specialize in customized website design and development, WordPress solutions, web applications, IT support, cybersecurity, and d
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+7 Services
3% E-Commerce Development
4% API Development & Integration
10% Custom Web Application Development
3% Legacy System Modernization
AI Summary
“NexusByte, based in Sydney, delivers tailored web development, IT support, cybersecurity, and data recovery services, empowering Australian businesses with scalable, secure digital solutions and long-term partnerships.”
Paragon
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Paragon is a leading provider of customer research, digital strategy, web, and commerce solutions that utilizes advanced marketing technologies like Sitecore and Episerver to enhance customer experiences. Our offerings encompass customer journey mapping, usability testing, user experience design, we
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Mayfield Heights, Ohio, Us
Services Provided+14 Services
4% Frontend Development
4% Backend Development
1% Legacy System Modernization
6% Custom Web Application Development
AI Summary
“Paragon delivers comprehensive digital solutions including customer research, strategy, UX design, and software development, empowering leading firms to achieve and sustain complex digital objectives.”
InnoBit Systems
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**Innovation Partner: Revolutionizing Businesses with Advanced Technology** InnoBit Systems stands out as a premier partner in software development and digital transformation, focusing on IoT, AI, SaaS, and cloud solutions. Over the past four years, we have successfully launched more than 15 MVPs a
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Greater Noida, Uttar Pradesh, In
Services Provided+9 Services
8% Custom Web Application Development
7% Mobile App Development (iOS & Android)
2% E-Commerce Development
7% Backend Development
AI Summary
“InnoBit Systems delivers advanced software development, IoT, AI, SaaS, and cloud solutions, empowering businesses with digital transformation, custom applications, and scalable, secure infrastructure services.”
Gart Tech
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At GART.tech, we focus on delivering innovative technology solutions that assist our clients in reaching their business objectives. Our team of expert consultants possesses extensive knowledge of the latest trends and best practices in cloud computing, data analytics, software development, and DevOp
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
New York, New York, Us
Services Provided+9 Services
4% Mobile App Development (iOS & Android)
6% Custom Web Application Development
5% Backend Development
4% Frontend Development
AI Summary
“Gart Tech delivers innovative, tailored software, AI, cybersecurity, and strategic IT consulting services, enabling clients to achieve business goals through agile digital transformation and secure technology solutions.”
Dinix Software
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Dinix Software assists leaders in designing, developing, and advancing software to foster growth. Our method integrates robust architecture with systematic delivery. We start with a discovery process to define objectives, align stakeholders, and mitigate uncertainties. Following that, we utilize sho
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+14 Services
3% Custom Web Application Development
1% CMS Development & Customization
3% API Development & Integration
2% SaaS Product Development
AI Summary
“Dinix Software partners with leaders to deliver custom software solutions, emphasizing robust architecture, quality, and flexible engagement for scalable, efficient, and secure digital growth.”
DIGITALRAIZ CREATIVE SOLUTIONS PRIVATE LIMITED
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DigitalRaiz is your comprehensive partner for all things related to design, technology, and marketing. We boast a wealth of experience gained through our collaboration with over 250 clients globally in software development and digital marketing. Our innovative approach is tailored for brands strivin
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Hyderabad, Telangana, In
Services Provided+33 Services
3% Mobile App Development (iOS & Android)
2% Legacy System Modernization
2% ERP & CRM Development
1% Blockchain & Web3 Development
AI Summary
“DigitalRaiz Creative Solutions Private Limited offers comprehensive expertise in design, software development, and digital marketing, supporting global clients to achieve innovative technology and business goals efficiently.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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