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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4,482 Companies

List of the Best Legacy System Modernization Agencies

Semantic Data Systems LLC
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We are a consulting firm specializing in information technology, made up of a diverse group of dedicated individuals committed to making a positive impact. Our team of experts has successfully carried out complex projects in enterprise application development and digital transformation initiatives.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Arlington, Virginia, Us
Services Provided+1 Services
35% Custom Web Application Development
15% Legacy System Modernization
10% Robotic Process Automation (RPA)
20% Cloud Consulting & SI
AI Summary
“Semantic Data Systems LLC is an IT consulting firm delivering enterprise application development and digital transformation services through a skilled, diverse team dedicated to impactful solutions.”
HISOFT HENAN co. LTD
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Drawing inspiration from advancements in the intelligent transportation and financial sectors, HISOFT Software leverages IT outsourcing, backed by the expertise and resources from HISOFT College, to deliver professional technical services to its clients. IT outsourcing is the core business and found
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
250-999
Employees
Zhengzhou, Henan, Cn
Services Provided+1 Services
12% Legacy System Modernization
7% E-Commerce Development
15% Custom Web Application Development
33% IT Staff Augmentation
AI Summary
“HISOFT HENAN co. LTD. specializes in IT outsourcing, delivering expert technical services in finance and intelligent transportation, leveraging big data for smart city and smart transportation solutions.”
Skyward Digital
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We are a dedicated team committed to building websites that stand the test of time. We prioritize users throughout the entire process to ensure an exceptional experience. Utilizing Jamstack, we employ a technology that enhances website speed, reliability, and scalability. Our team is focused on achi
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Bath, England, Gb
Services Provided+3 Services
43% Custom Web Application Development
8% Legacy System Modernization
12% UX Research & Usability Testing
10% Wireframing & Prototyping
AI Summary
“Skyward Digital delivers tailored software development and UX/UI design solutions, focusing on user experience, modern technologies like Jamstack, and scalable, high-performance web applications.”
Crux Digital
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Crux Digital is a digital agency dedicated to creating products centered around customer experiences. Our work is typically vital for a business's success; it often involves customer-facing software or internal tools that support the essential operations of the organization. We prioritize developing
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided
65% Custom Web Application Development
25% Mobile App Development (iOS & Android)
10% Legacy System Modernization
AI Summary
“Crux Digital is a digital agency specializing in customer-centric software and scalable design systems that enhance organizational efficiency and drive successful product development.”
Jaro.dev
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Fortune 500 businesses and venture capital-supported startups rely on us to deliver their minimum viable products and the most intricate projects.
Highlights
$10,000+
Min Project Size
2-9
Employees
Services Provided
50% Custom Web Application Development
20% Legacy System Modernization
30% Frontend Development
AI Summary
“Jaro.dev partners with Fortune 500 firms and startups to develop minimum viable products and complex projects, offering broad software development expertise across diverse industries.”
Clear App Development
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Clear App Development is a renowned mobile app development company located in Los Angeles, California. We assist enthusiastic individuals in creating innovative apps for iOS, iPhone, iPad, and Android, all while adhering to deadlines and budget constraints. Our expertise lies in enhancing existing m
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
80% Mobile App Development (iOS & Android)
10% Custom Web Application Development
10% Legacy System Modernization
AI Summary
“Clear App Development in Los Angeles specializes in agile iOS and Android mobile app creation, enhancement, and platform migration, delivering innovative solutions within deadlines and budgets.”
FusionStak
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Every challenge has a solution, and it is our responsibility to uncover it. No matter the industry, sector, season, or specialization, we tackle issues that completely change how our clients operate. We question the status quo, revamping outdated processes that companies consider conventional. We fi
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Baton Rouge, Louisiana, Us
Services Provided+3 Services
23% Custom Web Application Development
10% Legacy System Modernization
10% Cloud Consulting & SI
10% Other IT Consulting and SI
AI Summary
“FusionStak partners with clients across industries to challenge norms, revamp operations, and deliver innovative solutions that drive growth and future-ready business methods.”
Lucasian Labs
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We are a company that offers services for developing, maintaining, and enhancing software platforms for medium and large organizations. We utilize results-driven approaches, employ dependable technology, and engage dedicated personnel, enabling us to achieve significant milestones that establish us
Highlights
$50,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Bogota, Co
Services Provided
23% Custom Web Application Development
17% Mobile App Development (iOS & Android)
10% Legacy System Modernization
50% Cloud Consulting & SI
AI Summary
“Lucasian Labs provides dependable software development and maintenance services for medium and large organizations, emphasizing technology, dedicated teams, and corporate social responsibility.”
DigitalThinker, Inc
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DigitalThinker is a top service and support partner for HxGN EAM. Our expertise in HxGN EAM allows us to effectively align the software with your business processes through configuration, integration, and customization. We offer extensive support that goes beyond initial implementation, including co
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Simpsonville, South Carolina, Us
Services Provided
38% ERP & CRM Development
12% Legacy System Modernization
40% Operational Process Consulting
10% Market Research & Competitive Intelligence
AI Summary
“DigitalThinker, Inc. specializes in HxGN EAM solutions, offering comprehensive configuration, integration, training, and continuous support to optimize asset management and preventive maintenance.”
Kaladi Consulting Services
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Kaladi Consulting is an international technology consulting company that prioritizes a strong commitment to delivering results. We possess a broad range of industry knowledge and offer cross-platform expertise across various sectors such as FMCG, consumer goods, chemicals, pharmaceuticals, telecommu
Highlights
$10,000+
Min Project Size
$150+/hr
Avg Hourly Rate
50-249
Employees
Chennai, Tamil Nadu, In
Services Provided+1 Services
55% ERP Consulting and SI
15% Managed IT Services
10% Cloud Consulting & SI
10% Legacy System Modernization
AI Summary
“Kaladi Consulting Services is a global technology firm specializing in ERP implementations, Oracle upgrades, cloud services, and application development across multiple industries, delivering timely, quality solutions.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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