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

Creaticon
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Creaticon is a specialized interactive agency that assists businesses in establishing their online presence. We build applications using Symfony and Drupal, complemented by contemporary React and Vue front-end technologies. Our team supports companies in modernizing legacy systems, implementing mode
Highlights
$1,000+
Min Project Size
Zerniki Male, Lower Silesian, Pl
Services Provided
50% Custom Web Application Development
35% Legacy System Modernization
15% Frontend Development
AI Summary
“Creaticon is an interactive agency specializing in building and modernizing web applications using Symfony, Drupal, React, and Vue, with 17 years of experience supporting businesses' online presence.”
Weblse
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Revolutionizing industries through creative solutions. As a company specializing in Web Engineering and Business Logic Solutions, we provide flexible B2B, B2C, and SaaS services.
Highlights
$25,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
70% Custom Web Application Development
30% Legacy System Modernization
AI Summary
“Weblse delivers innovative web engineering and business logic solutions, offering adaptable B2B, B2C, and SaaS services that transform industries through creative technology applications.”
IoTellect
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Iotellect is a low-code IoT Application Enablement Platform that allows businesses to implement smart monitoring and automation in various sectors. It features a unified Edge/Cloud architecture, over 40 drivers (including MQTT, OPC UA, Kafka, SNMP, and HTTP), and a meticulously designed user interfa
Highlights
50-249
Employees
Dubai, Dubayy, Ae
Services Provided
34% Legacy System Modernization
33% Product UX Strategy
33% Robotic Process Automation (RPA)
AI Summary
“IoTellect is a low-code IoT platform offering unified Edge/Cloud solutions with extensive protocol support, enabling scalable, real-time smart monitoring and automation for diverse industries.”
BossLabs
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We are a software consulting firm dedicated to assisting you in modernizing your business and enhancing its efficiency in the digital realm. We create custom software from the ground up or collaborate with you to rejuvenate your existing software solutions.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Stockport, England, Gb
Services Provided+1 Services
35% Legacy System Modernization
25% Custom Web Application Development
20% Software Development Services
10% AR/VR & Mixed Reality Services
AI Summary
“BossLabs is a software consulting firm specializing in custom-built and modernized software solutions, aimed at enhancing business efficiency and digital transformation.”
CM System Designs
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With more than 30 years of experience, we help businesses of all sizes achieve strategic digital transformation, enhancing efficiency and profitability. We establish strong digital foundations that are crucial for future-proofing your organization and preparing for AI integration. Our Main Services
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
30% Legacy System Modernization
20% Backend Development
10% Frontend Development
AI Summary
“CM System Designs leverages over 30 years of expertise to deliver tailored software, system integration, AI enhancements, and consulting, fostering scalable digital transformation and long-term client partnerships.”
Digital Agents Interactive Pvt. Ltd.
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Digital Agents Interactive is a specialized, engineering-driven company at the cutting edge of immersive and intelligent technologies. With over ten years of demonstrated expertise, we create sophisticated simulators, digital twins, AI-enabled systems, enterprise-level games, and spatial computing e
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
New Delhi, Delhi, In
Services Provided
25% Custom Web Application Development
45% Mobile App Development (iOS & Android)
30% Legacy System Modernization
AI Summary
“Digital Agents Interactive Pvt. Ltd. delivers innovative software and immersive AR/VR/MR solutions, leveraging deep engineering expertise to create scalable, intelligent systems and enterprise-scale digital experiences.”
Redstone Content Solutions
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At Redstone, ensuring your business's success is our top priority. Thanks to our strategic alliance with Oracle, we facilitate a smooth transition to the cloud and achieve outstanding results globally. Our acknowledged Oracle expertise in multiple areas enables us to develop and execute solutions sp
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Waterloo, Iowa, Us
Services Provided
33% Legacy System Modernization
17% Custom Web Application Development
28% UX Research & Usability Testing
22% Product UX Strategy
AI Summary
“Redstone Content Solutions specializes in leveraging Oracle expertise to enable seamless cloud transitions and deliver tailored solutions that drive global business success across diverse challenges.”
Emdico Labs Inc
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A comprehensive digital innovation partner that assists teams in discovering, designing, building, managing, and safeguarding contemporary digital products. Driven by strategy and focused on execution, we are designed for growth.
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Burnaby, British Columbia, Ca
Services Provided
33% Legacy System Modernization
24% Managed IT Services
10% IT Compliance & Governance
33% UX Audit & Heuristic Evaluation
AI Summary
“Emdico Labs Inc. is a digital innovation partner specializing in discovering, designing, building, managing, and securing modern digital products, emphasizing strategy-driven growth and execution.”
Impulso.Space
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We don’t create your software; we enhance your development process. Most organizations don’t actually face a technology issue; rather, they encounter challenges in their workflows. Delayed releases, unstable codebases, and teams struggling to embrace modern methodologies reflect a lack of the right
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Fontane, Veneto, It
Services Provided
33% Legacy System Modernization
20% Other IT Consulting and SI
14% Cloud Consulting & SI
33% Kubernetes & Container Orchestration
AI Summary
“Impulso.Space enhances software development by integrating with engineering teams to implement modern practices like Agile, CI/CD, cloud-native solutions, and hands-on coaching, enabling faster, confident delivery.”
Ad-Apt
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Ad-apt is a comprehensive digital marketing agency offering a diverse array of services. Our offerings encompass various online marketing strategies, including search engine optimization (SEO), pay-per-click (PPC) advertising, optimization of Shopify stores, website development, conversion rate opti
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Lake Oswego, Oregon, Us
Services Provided+5 Services
10% Search Engine Optimization (SEO)
8% Pay Per Click
8% Conversion Rate Optimization (CRO)
5% Ecommerce Marketing
AI Summary
“Ad-Apt is a versatile digital marketing agency specializing in SEO, PPC, ecommerce, conversion optimization, and web development, delivering targeted online strategies to enhance clients' traffic and sales.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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