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

Heptagon Technologies Pvt. Ltd.
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Heptagon is a consultancy focused on digital transformation, providing technology solutions to both large enterprises and small to medium-sized businesses throughout their digital journey, which includes processes like digitization, digitalization, and overall digital transformation. **Products:**
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+1 Services
20% Blockchain & Web3 Development
20% Software Development Services
20% Legacy System Modernization
20% Mobile App Development (iOS & Android)
AI Summary
“Heptagon Technologies Pvt. Ltd. delivers end-to-end digital transformation through blockchain development, custom software, mobile apps, and user-centric UI/UX design, enabling scalable solutions across industries.”
ImpiCode
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At ImpiCode, we focus on developing mobile, web, and IoT applications. Our team of 40 experts has successfully delivered over 80 projects for startups, corporations, NGOs, and other organizations. We emphasize providing efficient and customized software solutions. While we create projects from the g
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Warszawa, Masovian, Pl
Services Provided
35% Custom Web Application Development
40% Mobile App Development (iOS & Android)
15% API Development & Integration
10% Legacy System Modernization
AI Summary
“ImpiCode is a Warsaw-based software company specializing in mobile, web, and IoT development, delivering custom solutions and IT consulting globally across diverse industries with expert teams.”
Siam Computing
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We are a development agency specializing in three main areas: 1. Product Development 2. Mobile App Development 3. Custom Software Development. We have collaborated with both startups and large enterprises, successfully completing over 180 projects across various sectors, including Education, Busines
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Chennai, Tamil Nadu, In
Services Provided
40% Custom Web Application Development
35% Mobile App Development (iOS & Android)
15% API Development & Integration
10% Legacy System Modernization
AI Summary
“Siam Computing is a development agency delivering product, mobile app, and custom software solutions across diverse sectors, with 45 engineers and over 180 projects completed.”
Fakir Technology Consultants GmbH
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Gegründet im Jahr 2005, verfügt die Fakir Informatik über mehr als ein Jahrzehnt an Erfahrung und Begeisterung für Informationstechnologie. Heute unterstützen wir mittelständische Unternehmen, große Konzerne sowie staatliche Institutionen dabei, die Digitalisierung erfolgreich zu gestalten. Zu unser
Highlights
10-49
Employees
Sulzbach an der Murr, Baden Wurttemberg, De
Services Provided
50% Custom Web Application Development
30% Mobile App Development (iOS & Android)
15% Legacy System Modernization
5% QA & Software Testing
AI Summary
“Founded in 2005, Fakir Technology Consultants GmbH leverages over a decade of IT expertise to support diverse clients in successfully implementing digital transformation initiatives.”
Latitude 40 Consulting, Inc.
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Selecting the right software partner is crucial. We provide transparency, responsibility, and a trusted methodology to guide you through uncertainty and develop durable software solutions. At Latitude 40 Consulting, our goal is to assist businesses in reaching operational excellence and enduring agi
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Broomfield, Colorado, Us
Services Provided+3 Services
18% Custom Web Application Development
15% API Development & Integration
5% E-Commerce Development
13% Legacy System Modernization
AI Summary
“Latitude 40 Consulting, Inc. delivers tailored software solutions and application modernization, guiding businesses toward operational excellence and lasting agility with transparent, responsible methodologies.”
Codibly
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Codibly is a comprehensive consulting and software development firm that originated from a commitment to software excellence. Initially starting as a small software house with a team of fifteen, our goal was to provide perfect technological solutions. Today, we have grown to nearly 100 talented prof
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Krakow, Lesser Poland, Pl
Services Provided+4 Services
13% Legacy System Modernization
28% Custom Web Application Development
10% Mobile App Development (iOS & Android)
15% Machine Learning Model Development
AI Summary
“Codibly is a growing consulting and software development firm delivering advanced technology solutions, integrating AI, cloud, IoT, and analytics to drive clients' digital transformation and growth.”
Code Harbor
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Code Harbor, an IT development team based in Kyiv, assists FinTech companies in accelerating their growth and scalability by streamlining operational tasks, enhancing data security, and ensuring clear data flows. We fully commit to your project and deliver detailed progress reports every two weeks.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Kyiv, Kv, Ua
Services Provided+5 Services
13% Legacy System Modernization
3% E-Commerce Development
10% Custom Web Application Development
18% Go-to-Market Strategy
AI Summary
“Code Harbor is a Kyiv-based IT development team specializing in supporting FinTech growth by streamlining operations, enhancing data security, and providing transparent project management.”
Odata Solutions
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Odata Solutions develops and implements cloud-based ERP systems that facilitate the synchronization of business operations across various locations and devices using real-time data. The company offers ERP software for businesses, including POS, MPOS, and Multi-Channel Retail systems, along with inte
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+1 Services
50% Custom Web Application Development
20% ERP Consulting and SI
15% Legacy System Modernization
10% AR/VR & Mixed Reality Services
AI Summary
“Odata Solutions offers cloud-based ERP systems integrating POS, retail, e-commerce, and transportation management, providing scalable, secure, and user-friendly business operation synchronization across devices and locations.”
Aumenta
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Aumenta Software provides nearshore software development services and staff augmentation to organizations in the US, Canada, and Latin America from Mexico. Our proximity fosters strong relationships, aided by similarities in time zones, culture, and mindset. We offer top-notch expertise to internati
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
San Luis Potosi, San Luis Potosi, Mx
Services Provided
25% Custom Web Application Development
15% Mobile App Development (iOS & Android)
10% Legacy System Modernization
50% IT Staff Augmentation
AI Summary
“Aumenta Software delivers nearshore software development and staff augmentation from Mexico, leveraging cultural proximity and advanced technology to provide cost-effective, high-quality solutions enhancing business productivity.”
Mediafly
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Integrate interactive content with technology to create the most engaging purchasing experiences, while equipping your sales teams with revenue insights for a comprehensive understanding of pipeline performance and status. Stand out in both face-to-face and virtual settings with a seamlessly integra
Highlights
10-49
Employees
Chicago, Illinois, Us
Services Provided
15% Legacy System Modernization
35% Custom Web Application Development
50% Revenue Operations (RevOps)
AI Summary
“Mediafly offers an integrated sales enablement and content management platform that combines interactive content and revenue insights, enhancing engagement and pipeline visibility in diverse sales environments.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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