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

Lighthouse growth sp. z o.o.
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- Development of digital products in media streaming, e-commerce, logistics, and telecommunications - Project-specific initiatives or extending teams/staff augmentation - Establishing remote teams - Recruiting top IT professionals for your organization - Retaining and enhancing the value of
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Gdansk, Pomeranian, Pl
Services Provided
20% Legacy System Modernization
30% Custom Web Application Development
35% Other IT Consulting and SI
15% IT Staff Augmentation
AI Summary
“Lighthouse growth sp. z o.o. develops digital products across media, e-commerce, logistics, and telecom, offering remote teams, staff augmentation, and expertise in SAP, Java, and .NET technologies.”
Lobster Technologies
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We assist both new startups and well-established businesses in thriving! A group of expert professionals has come together under the name Lobster. Our shared commitment is to value our clients and maintain high standards of quality. Customer satisfaction is our primary objective, as it fuels our own
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
50-249
Employees
Tigard, Oregon, Us
Services Provided+2 Services
13% BI & Big Data Consulting & SI
17% AI Strategy & Roadmap Consulting
15% Machine Learning Model Development
5% Custom AI Chatbot Development
AI Summary
“Lobster Technologies is a professional team dedicated to supporting startups and established businesses with high-quality services focused on client satisfaction and success.”
PALADEM
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PALADEM, located in Boise, Idaho, is a software consulting firm that provides fractional CTO and CIO services as well as custom AI-driven software development. We assist business leaders in making informed technology choices while our team creates secure and scalable applications customized for each
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Eagle, Idaho, Us
Services Provided+4 Services
15% Custom Web Application Development
8% Mobile App Development (iOS & Android)
5% E-Commerce Development
23% Legacy System Modernization
AI Summary
“PALADEM offers expert fractional CTO/CIO services and custom AI-driven software development, focusing on secure, scalable applications, legacy system modernization, and long-term maintenance.”
Eyzee
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We are an IT consulting firm dedicated to enhancing our clients' businesses by developing and executing IT solutions that drive their growth. Our team comprises more than 90 specialists, including programmers, analysts, consultants, and testers, who possess extensive knowledge and experience in empl
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Warszawa, Masovian, Pl
Services Provided
40% Custom Web Application Development
10% Legacy System Modernization
50% Cloud Consulting & SI
AI Summary
“Eyzee is an IT consulting firm with over 90 experts delivering tailored IT solutions across sectors like telecom and banking, leveraging proprietary tools and partnerships with Google and Atlassian.”
Envision IT
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Envision IT executes high-risk projects without the associated risks, stress, or uncertainty, all while adhering to fixed costs and timelines. They are the perfect partner for those who cannot afford to fail and require swift results. Founded in 2002, Envision IT specializes in custom software devel
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Oakleigh South, Victoria, Au
Services Provided+2 Services
20% Custom Web Application Development
15% Legacy System Modernization
10% API Development & Integration
5% SaaS Product Development
AI Summary
“Envision IT, an Australian firm since 2002, specializes in custom software, SaaS products, legacy modernization, and cloud solutions, delivering scalable, secure, and enterprise-focused applications across industries.”
Blockchain Apps Developer
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BlockchainAppsDeveloper is a premier Blockchain Development Company that provides comprehensive services for developing cryptocurrency exchanges and trading platforms tailored for businesses, startups, and entrepreneurs. Our cryptocurrency exchange script enhances the security, ease, and reliability
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Thiru Nagar, Tamil Nadu, In
Services Provided
80% Blockchain & Web3 Development
5% Legacy System Modernization
15% Custom Web Application Development
AI Summary
“Blockchain Apps Developer specializes in blockchain and web3 solutions, offering secure cryptocurrency platforms, enterprise app modernization, and custom web applications primarily for business and financial sectors.”
HOTOVO
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We are a software development team that excels in delivering results. In Slovak, "Hotovo" translates to "done," so you can have confidence that we will fulfill your technology needs! Our enthusiastic group of tech professionals views software development as both a pleasure and an art, and we approac
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Kosice, Kosice, Sk
Services Provided+5 Services
25% IT Staff Augmentation
20% Legacy System Modernization
10% Internet of Things Services
10% Mobile App Development (iOS & Android)
AI Summary
“HOTOVO is a Slovak software development company with 150+ global experts, committed to delivering innovative, reliable, and high-quality tech solutions through long-term partnerships since 2010.”
Codigitar
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We focus on providing expert software development services for businesses. Collaborating with our clients, we create the foundational technology that supports their operations. Our goal is to automate and enhance manual processes to lower operational costs and improve oversight.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided
60% Custom Web Application Development
25% E-Commerce Development
15% Legacy System Modernization
AI Summary
“Codigitar offers expert software development services, collaborating with businesses to create foundational technology that automates processes, reduces costs, and enhances operational oversight.”
Axon Collective, LLC
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Change can be challenging, but we're here to help. Whether you're a growing startup or a well-established company, navigating digital transformation can be a lengthy and stressful endeavor. Outdated systems that once served you well no longer meet your needs, and legacy applications lack the flexibi
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Houston, Texas, Us
Services Provided
33% Custom Web Application Development
17% Legacy System Modernization
50% Cloud Consulting & SI
AI Summary
“Axon Collective specializes in digital transformation and software consulting, delivering tailored, scalable cloud solutions to modernize businesses efficiently with continuous support and expert guidance.”
KeenEye
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KeenEye offers customized software engineering services for both mid to large companies and startups. We engage in transformative and large-scale projects in various countries including the USA, France, Australia, India, Sri Lanka, the Maldives, Croatia, and Belgium. Our primary areas of expertise a
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Colombo, Western Province, Lk
Services Provided
20% Custom Web Application Development
18% Mobile App Development (iOS & Android)
12% Legacy System Modernization
50% AI Strategy & Roadmap Consulting
AI Summary
“KeenEye provides tailored software engineering services globally, specializing in IoT, healthcare, and logistics for mid to large companies and startups across multiple countries.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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