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

Talenting Software
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We assist software companies by establishing remote development teams that integrate seamlessly into their own operations. Our approach involves collaborating with top talent from our Software Development Center in Brașov, Romania, and our office in the Netherlands. At Talenting Software, we value t
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Brasov, Brasov, Ro
Services Provided+1 Services
20% Custom Web Application Development
15% API Development & Integration
10% SaaS Product Development
5% Legacy System Modernization
AI Summary
“Talenting Software builds expert remote development teams, leveraging over 25 years' software experience and nearshoring expertise in Romania to deliver seamless integration and outstanding products.”
Averon Technologies
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Averon Technologies is a technology consulting and IT services firm that provides dependable, scalable, and high-quality software solutions to startups, SMEs, and large enterprises globally. We specialize in tailored software development, mobile app development, web app development, and cloud soluti
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Rajkot, Gujarat, In
Services Provided
40% Mobile App Development (iOS & Android)
40% Custom Web Application Development
10% E-Commerce Development
10% Legacy System Modernization
AI Summary
“Averon Technologies delivers scalable, high-quality custom software, mobile, and cloud solutions globally, partnering with startups to enterprises for efficient, growth-focused digital product development and support.”
UBERApps Technologies
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UBERApps - A highly customizable SAAS solution, recognized as one of the top-selling products on the market. At UBERApps Technologies, we are committed to continuously enhancing the On-Demand Services Experience, making it simple and cost-effective for startups, entrepreneurs, and business owners to
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Noida, Uttar Pradesh, In
Services Provided+1 Services
35% Mobile App Development (iOS & Android)
3% Legacy System Modernization
7% Custom Web Application Development
5% E-Commerce Development
AI Summary
“UBERApps Technologies offers a customizable SaaS platform enabling startups and businesses to launch feature-rich on-demand service applications across industries like ridesharing, logistics, and healthcare.”
Faber Soft
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Faber Soft assists businesses in creating, developing, and upgrading software systems. Whether it’s new applications or intricate migrations, we excel at tackling challenging issues with sustainable engineering practices. As a compact, experienced team, we prioritize clarity, accuracy, and teamwork—
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
14% Legacy System Modernization
5% Mobile App Development (iOS & Android)
15% Custom Web Application Development
33% Web App UI Design
AI Summary
“Faber Soft is a skilled software development firm specializing in creating, enhancing, and migrating applications with sustainable engineering, emphasizing clarity, accuracy, and long-term reliability for business growth.”
Vauldex
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Enabling Digital Transformation through Innovative Offshore Development Solutions We are an offshore development company based in Japan and the Philippines, specializing in Web and Mobile Development, Blockchain Solutions, App Modernization, System Maintenance and Operation, as well as AI Developme
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Fukuoka, Jp
Services Provided+1 Services
30% Mobile App Development (iOS & Android)
35% Custom Web Application Development
20% Blockchain & Web3 Development
10% E-Commerce Development
AI Summary
“Vauldex is an offshore development partner specializing in web, mobile, blockchain, AI, and big data solutions, delivering customized, high-quality software with agile, user-centric designs.”
CCA Europe.pl
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What do we do? We offer tailored software solutions for the financial industry, specializing in comprehensive core banking, card systems, and payment processing development projects. Additionally, we deliver workload automation solutions, mobile and business applications, software testing, and busin
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Wroclaw, Pl
Services Provided
40% Custom Web Application Development
35% Backend Development
15% Frontend Development
10% Legacy System Modernization
AI Summary
“CCA Europe.pl delivers tailored software solutions for the financial sector, specializing in core banking, card systems, payment processing, and automation, leveraging agile methodologies for major banking clients.”
APPSTEAN INFOTECH PRIVATE LIMITED
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Appstean is a company that specializes in IT services and app development, established with the vision of driving an innovative revolution. Seeking a strong name to represent our next-generation IT aspirations, Process Master Technologies evolved into 'Appstean Infotech Private Limited' in 2012. Thi
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Indore, Madhya Pradesh, In
Services Provided+4 Services
25% Mobile App Development (iOS & Android)
20% Cloud Consulting & SI
10% Legacy System Modernization
10% Other IT Consulting and SI
AI Summary
“Appstean Infotech Private Limited specializes in innovative IT services, app development, and digital transformation, delivering comprehensive enterprise and cloud-based software solutions internationally.”
Rara Labs
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Rara Labs is a specialized software development firm that has been serving clients worldwide since 2014. We have successfully completed over 20 projects across various sectors. Our diverse portfolio includes industries such as Fintech, ERP, Healthcare, Fitness & Lifestyle, AI, ML, and more. Our team
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Lalitpur, Bagmati, Np
Services Provided+3 Services
15% Mobile App Development (iOS & Android)
15% Custom Web Application Development
8% E-Commerce Development
5% Legacy System Modernization
AI Summary
“Rara Labs is a global software development firm specializing in business process automation, data-driven enterprise and mobile applications across diverse sectors including fintech, healthcare, and AI.”
Coffee Mug
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Coffee Mug is a software development firm that provides cloud-native, scalable, and high-performance digital solutions. We assist businesses in upgrading their legacy systems, creating efficient cloud infrastructures, and developing custom CMS platforms, always emphasizing seamless functionality and
Highlights
$25,000+
Min Project Size
10-49
Employees
Katowice, Silesian, Pl
Services Provided+2 Services
13% Custom Web Application Development
10% Legacy System Modernization
10% CMS Development & Customization
10% API Development & Integration
AI Summary
“Coffee Mug specializes in developing scalable, cloud-native digital solutions using Microsoft Azure, AWS, and custom CMS platforms, modernizing legacy systems with a focus on performance and design.”
IgniTech GmbH
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IgniTech GmbH is a Swiss IT firm that assists small and medium-sized enterprises in digitizing their operations by providing tailored software solutions, automating processes, and offering insightful IT consulting services.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
10% Legacy System Modernization
50% DevOps Engineering
AI Summary
“IgniTech GmbH, a Swiss IT company, supports SMEs through custom software, process automation, and strategic IT consulting to enhance digital transformation and operational efficiency.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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