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

illoren
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Illoren is a design and technology studio that creates digital products from concept to launch. We collaborate with startups and mid-sized companies to develop meaningful brands, products, and experiences that foster growth and transformation.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
15% API Development & Integration
20% Custom Web Application Development
13% Mobile App Development (iOS & Android)
2% Legacy System Modernization
AI Summary
“Illoren is a design and technology studio partnering with startups and mid-sized companies to develop impactful digital products, brands, and experiences from concept through launch.”
Olam Sites
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Many web design agencies often keep you uninformed about unforeseen expenses, delays, and lack of transparency in their procedures. Our skilled team transforms your ideas into reality, ensuring you feel assured throughout the entire process. Creating an excellent website shouldn’t be a source of str
Highlights
$5,000+
Min Project Size
$150+/hr
Avg Hourly Rate
2-9
Employees
Services Provided+3 Services
35% Custom Web Application Development
10% Mobile App Development (iOS & Android)
5% Legacy System Modernization
13% Product UX Strategy
AI Summary
“Olam Sites is a transparent web design agency committed to delivering customized websites efficiently, minimizing stress by keeping clients informed throughout the development process.”
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Stratym
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Stratym is an advanced AI development firm that helps global businesses transform their ideas into intelligent and scalable solutions. Since our establishment in 2017, we have collaborated with over 250 clients, including Optrenix AI, Velmora CoreTech, Trenavo Digital, Cyverna Dynamics, and Brevanta
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Sahibzada Ajit Singh Nagar, Punjab, In
Services Provided+14 Services
5% AI Strategy & Roadmap Consulting
5% LLM Integration & Prompt Engineering
3% Custom AI Chatbot Development
5% Machine Learning Model Development
AI Summary
“Stratym is a global AI development firm delivering tailored, scalable solutions across industries since 2017, leveraging generative AI, LLMs, and advanced technologies to drive innovation and efficiency.”
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USofte
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Located in the heart of Silicon Valley, USofte represents a pinnacle of innovation and excellence in software development. Our diverse team of experienced professionals focuses on creating advanced solutions specifically designed to address the distinct needs of businesses around the globe. From eng
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+2 Services
15% Custom Web Application Development
13% Mobile App Development (iOS & Android)
10% API Development & Integration
7% E-Commerce Development
AI Summary
“USofte, based in Silicon Valley, excels in innovative software development, delivering tailored web, mobile, and AI solutions that enhance business efficiency and digital transformation.”
Elucomputing
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Elucomputing is a company that specializes in software development and consulting. With extensive experience in software design and development, it offers technological solutions for individuals and businesses of all sizes. Our mission is to leverage technology to enhance efficiency and productivity
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+9 Services
6% Legacy System Modernization
10% Custom Web Application Development
4% Mobile App Development (iOS & Android)
6% Unified Communications Consulting & SI
AI Summary
“Elucomputing specializes in software development and consulting, delivering tailored technological solutions to enhance efficiency and productivity for individuals and businesses of all sizes.”
Acentria Technologies Pvt ltd
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ACENTRIA Technologies is a leading software development firm in Vietnam, providing top-tier software development services to clients around the globe. Recognized as a top-ranked company, we focus on transforming innovative ideas into practical and efficient digital solutions that succeed in the curr
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Jaipur, Rajasthan, In
Services Provided+5 Services
8% AI Strategy & Roadmap Consulting
8% Custom AI Chatbot Development
10% Machine Learning Model Development
7% Conversational AI & Voice Assistant Development
AI Summary
“ACENTRIA Technologies, a top-ranked Vietnamese software firm, delivers innovative and efficient software development services globally, transforming ideas into practical digital solutions for competitive markets.”
ITADS
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We develop contemporary and striking applications for the web, mobile, and API integrations using the appropriate programming languages in an agile and innovative manner. By merging design thinking, strategic planning, technology, and marketing, we guide our clients toward a successful future.
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Bangkok, Krung Thep Maha Nakhon, Th
Services Provided+6 Services
10% Custom Web Application Development
8% Mobile App Development (iOS & Android)
10% API Development & Integration
3% Legacy System Modernization
AI Summary
“ITADS develops innovative web, mobile, and API applications, combining design thinking, strategic planning, technology, and marketing to help clients achieve successful outcomes.”
Wise Minds
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The Wise Minds offers comprehensive product teams for scale-ups needing to accelerate their growth without the burden of recruiting, managing, and coordinating talent on their own. Located in Amsterdam, the company provides an immediate team that comprises developers, a product leader, delivery supp
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
30% Custom Web Application Development
3% Legacy System Modernization
27% DevOps Engineering
7% IT Compliance & Governance
AI Summary
“Wise Minds delivers ready-to-deploy, integrated product teams for scale-ups, ensuring seamless collaboration, consistent delivery, and leadership engagement to accelerate growth without recruitment burdens.”
IP Kolyada
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Creating software unicorns as needed.
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
Bangkok, Krung Thep Maha Nakhon, Th
Services Provided+4 Services
5% Legacy System Modernization
10% API Development & Integration
10% Custom Web Application Development
25% DevOps Engineering
AI Summary
“IP Kolyada specializes in developing high-growth software enterprises, focusing on creating scalable, innovative solutions to establish industry-leading technology companies.”
EmergenceTek Group
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EmergenceTek Group (ETG) is a specialized technology consulting company that offers services in data engineering, system integration, blockchain, software development, team support, and premium consulting for small and medium-sized businesses, primarily targeting the healthcare sector.
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Buffalo, New York, Us
Services Provided+24 Services
2% Robotic Process Automation (RPA)
2% Custom AI Chatbot Development
2% Generative AI
3% Machine Learning Model Development
AI Summary
“EmergenceTek Group is a technology consulting firm specializing in data engineering, system integration, blockchain, software development, and consulting services mainly for healthcare SMBs.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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