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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We evaluate companies on verified profile data: services, pricing, locations, and portfolio. Client reviews are being collected. We may earn a fee for some placements. How we rank and verify

4,482 Companies

List of the Best Legacy System Modernization Agencies

Arounda
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We serve as a design and development partner dedicated to modernizing large digital platforms. With over a decade of experience, our team has successfully executed more than 350 platform initiatives for businesses ranging from enterprises to SMEs. We leverage strategy, design, and engineering to enh
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
25% Frontend Development
8% Legacy System Modernization
14% Product UX Strategy
12% UX Research & Usability Testing
AI Summary
“Arounda integrates strategy, design, and frontend engineering to modernize digital platforms, enhancing user experience, scalability, and brand trust for enterprises and SMEs globally.”
CodeBridle
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Elevate Your Business with Innovative Software Solutions! We are a dynamic startup dedicated to transforming the software landscape. Our team in London is rich in expertise and passionate about driving innovation. Why Choose CodeBridle? Fresh & Eager: As newcomers to the industry, we are determined
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
50% Custom Web Application Development
40% Mobile App Development (iOS & Android)
10% Legacy System Modernization
AI Summary
“CodeBridle is a London-based startup delivering innovative, customized software solutions using cutting-edge technologies and data-driven insights to enhance business performance at competitive rates.”
Global IT Solutions
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Global IT Solutions focuses on developing Enterprise Applications, providing services such as Custom Application Development, Application Re-engineering, and Web Application Development. Established in 2018, the company has been providing high-quality financial and human capital management solutions
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Dhaka, Dhaka, Bd
Services Provided+2 Services
23% Custom Web Application Development
8% CMS Development & Customization
12% Legacy System Modernization
7% Mobile App Development (iOS & Android)
AI Summary
“Global IT Solutions delivers tailored enterprise applications and modern software solutions, specializing in custom development, app modernization, and user-focused web and mobile design across diverse industries.”
Evoluum
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We focus on creating personalized software solutions for businesses around the globe. Our agile and cooperative teams are committed to helping organizations implement their strategic objectives effectively. We partner with companies that incorporate technology into their daily operations and believe
Highlights
50-249
Employees
Palhoca Pedra Branca, Santa Catarina, Br
Services Provided
20% Mobile App Development (iOS & Android)
8% Legacy System Modernization
22% Custom Web Application Development
50% Cloud Consulting & SI
AI Summary
“Evoluum delivers tailored software and AI-driven automation solutions, partnering with diverse industries to enhance efficiency, drive digital transformation, and realize strategic business goals.”
SocialPie Technologies
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At SocialPie Tech, we aim to be at the forefront of technological progress, driving a future where innovation is limitless. Our goal is to motivate the world with our innovations, making a significant difference in people's lives. By harnessing the transformative potential of technology, we strive t
Highlights
50-249
Employees
Karachi, Sindh, Pk
Services Provided+3 Services
17% Custom Web Application Development
10% Legacy System Modernization
7% CMS Development & Customization
16% Cloud Infrastructure Setup (AWS / GCP / Azure)
AI Summary
“SocialPie Technologies drives technological innovation to empower industries, individuals, and communities, fostering growth and connectivity in a rapidly evolving global landscape.”
Appinlay Pvt Ltd
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Appinlay provides comprehensive mobile app development services tailored to your business needs for both iOS and Android platforms. Our team, which is focused on customer satisfaction, collaborates with a diverse range of certified partners to oversee your projects from start to finish.
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Noida, Uttar Pradesh, In
Services Provided
70% Mobile App Development (iOS & Android)
10% E-Commerce Development
5% Legacy System Modernization
15% Custom Web Application Development
AI Summary
“Appinlay Pvt Ltd. specializes in comprehensive mobile app development for iOS and Android, collaborating with certified partners to ensure customer-focused project delivery from inception to completion.”
Digital Nomad Agency
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Digital Nomad Agency (DNA) is a software development firm that focuses on creating cutting-edge mobile and web applications, as well as UI/UX designs and backend solutions. Our mission is straightforward: to provide outstanding digital experiences that elevate your business or concept. We recognize
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
50% Mobile App Development (iOS & Android)
40% Custom Web Application Development
10% Legacy System Modernization
AI Summary
“Digital Nomad Agency delivers innovative mobile and web applications with expert UI/UX design, backend development, and ongoing support, ensuring reliable, efficient, and visually compelling digital solutions.”
Itechnotree Enterprise Pvt Ltd
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"Thank you for being with us on the journey of growing my business" – a heartfelt and significant review from one of our first clients, whom we still value today. Itechnotree is a premier IT agency focused on providing cutting-edge solutions to help businesses enhance their technological framework.
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+5 Services
20% Software Development Services
20% E-Commerce Development
15% Mobile App Development (iOS & Android)
10% Machine Learning Model Development
AI Summary
“Itechnotree Enterprise Pvt Ltd delivers comprehensive IT solutions including custom software, AI-driven automation, and managed cloud services, empowering businesses with tailored, innovative technology and strategic support.”
APPiLY Technologies
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ABOUT US We are a leading web and mobile app development firm located in Bangalore. Since our founding in 2014, we have provided exceptional application development services to clients around the globe. With a decade of experience, we have honed our technical skills and established a strong projec
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Bengaluru, Karnataka, In
Services Provided+1 Services
35% Mobile App Development (iOS & Android)
15% E-Commerce Development
20% API Development & Integration
25% Custom Web Application Development
AI Summary
“APPiLY Technologies, based in Bangalore since 2014, specializes in web and mobile app development delivering digital transformation solutions globally with advanced technical expertise across diverse industries.”
Oaperg
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Oaperg Technology is a dependable partner for business innovation, dedicated to developing IT advancements for clients through advanced software, inventive solutions, and strategic collaborations. Founded in 2010, Oaperg is a privately-held firm located in Houston, Texas, with a global clientele ser
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Houston, Texas, Us
Services Provided
40% Custom Web Application Development
30% Backend Development
20% Frontend Development
10% Legacy System Modernization
AI Summary
“Oaperg Technology, founded in 2010, delivers innovative IT solutions and strategic partnerships, leveraging global expertise to provide adaptable, technology-driven business growth services.”

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Top Legacy System Modernization Firms

List of the Best Legacy System Modernization Agencies

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