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

611 Digital
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Agile methodologies for software development, along with consulting services and digital transformation initiatives.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
35% Custom Web Application Development
25% Mobile App Development (iOS & Android)
15% E-Commerce Development
25% Legacy System Modernization
AI Summary
“611 Digital specializes in agile software development, offering consulting services and driving digital transformation initiatives to enhance organizational efficiency and innovation across sectors.”
DATAHEDRON
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How we can assist you: Reasons to choose us
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Oradea, Bihor, Ro
Services Provided+3 Services
25% Legacy System Modernization
15% BI & Big Data Consulting & SI
3% IT Staff Augmentation
7% Machine Learning Model Development
AI Summary
“DATAHEDRON offers versatile solutions with a customer-focused approach, emphasizing quality service to address diverse client needs efficiently and professionally.”
Euristiq
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Euristiq is a custom software development firm that is inherently focused on AI, assisting companies in innovating, modernizing, and expanding. We provide secure, high-performance solutions in areas such as AI development, legacy system upgrades, IoT & AIoT, and data analytics. This empowers clients
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Toronto, Ontario, Ca
Services Provided+4 Services
13% API Development & Integration
20% Legacy System Modernization
18% Custom Web Application Development
15% Machine Learning Model Development
AI Summary
“Euristiq specializes in AI-driven custom software development, delivering secure, high-performance solutions including AI, IoT, legacy upgrades, and data analytics to optimize client outcomes across industries.”
intive
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Intive is a global technology firm focused on creating digital experiences that merge technical expertise with a customer-oriented approach. With a passion for technology, intive offers customized solutions that consistently satisfy the needs of its clients. The company boasts a diverse workforce of
Highlights
$50-99/hr
Avg Hourly Rate
1000-9999
Employees
Wroclaw, Lower Silesian, Pl
Services Provided+1 Services
38% Mobile App Development (iOS & Android)
13% Legacy System Modernization
15% UX Research & Usability Testing
12% Wireframing & Prototyping
AI Summary
“Intive is a global technology firm delivering innovative, customer-focused digital solutions across diverse industries, combining agile expertise with a skilled workforce of 2,000 professionals worldwide.”
The Glimpse Group
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The Glimpse Group is a company that operates as a platform for Virtual and Augmented Reality, consisting of various businesses focused on VR/AR software and services. Our distinctive model is tailored to address the challenges of this growing industry, promoting innovation and collaboration while di
Highlights
50-249
Employees
New York, New York, Us
Services Provided
30% Custom Web Application Development
40% Mobile App Development (iOS & Android)
10% Blockchain & Web3 Development
20% Legacy System Modernization
AI Summary
“The Glimpse Group operates a diverse platform of VR/AR businesses, fostering innovation and collaboration within the virtual and augmented reality industry through software and services.”
LD Studios
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Your product, our expertise. We connect technology with business requirements. Our projects typically generate a return on investment within six months for established businesses. With LD Studios, you can trust that your confidential information remains safe. We recognize that change is unavoidable,
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
70% Custom Web Application Development
15% E-Commerce Development
15% Legacy System Modernization
AI Summary
“LD Studios specializes in efficient, secure Ruby on Rails development, delivering scalable, ROI-driven solutions with integrity and active client collaboration across startups, enterprises, and nonprofits.”
Analance
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At Analance, we are redefining success for our employees, clients, and partners. Our mission is clear: to drive innovation and empower organizations to become data-driven, optimized, fearless, and scalable. With 19 years of experience as part of the Sryas Group, Analance stands out from typical star
Highlights
250-999
Employees
Services Provided
50% BI & Big Data Consulting & SI
20% Legacy System Modernization
30% Custom Web Application Development
AI Summary
“Analance leverages 19 years of expertise to drive innovation and empower organizations with data-driven, scalable solutions, fostering a culture of integrity, learning, and customer focus.”
Zeitech Solutions Pvt Ltd
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Zeitech Solutions Pvt Ltd is a software research and development firm established in 2007, dedicated to offering adaptable, competitive, and high-quality IT services to clients. Whether catering to startups or small to medium enterprises, we recognize that digital products are crucial. We assist our
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
40% Software Development Services
20% QA & Software Testing
20% Legacy System Modernization
10% Other IT Consulting and SI
AI Summary
“Zeitech Solutions Pvt Ltd, founded in 2007, specializes in tailored web and mobile software development, leveraging expert consulting and a skilled network to deliver high-quality, business-focused IT solutions for startups and SMEs.”
DevsSpace
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DevsSpace is an IT firm staffed with certified professionals ready to assist you in web development and IT solutions. We provide a variety of digital solutions and business consulting services at competitive prices.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Dubai, Dubayy, Ae
Services Provided+5 Services
20% E-Commerce Development
20% Legacy System Modernization
15% Low-Code MVP Development
10% Software Development Services
AI Summary
“DevsSpace is an IT firm offering web development, digital solutions, and business consulting services through certified professionals, delivering competitive and comprehensive IT support to businesses.”
ExperionTRx
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At ExperionTRx, we recognize that delivering excellent client experiences is crucial for building successful businesses. A key element of enhancing these experiences is the user-friendliness and mobility offered by digital technologies. ExperionTRx enables organizations to leverage digital innovatio
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Auckland, Auckland, Nz
Services Provided
20% Legacy System Modernization
30% Custom Web Application Development
28% Cloud Consulting & SI
22% BI & Big Data Consulting & SI
AI Summary
“ExperionTRx delivers tailored digital solutions across Retail, Healthcare, Transportation, and FinTech sectors, leveraging a hybrid delivery model and extensive New Zealand market expertise.”

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Top Legacy System Modernization Firms

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