Legacy systems come as a costly burden, depleting not only your budget but also your team. Legacy software is getting harder and more expensive to maintain compared to modern solutions mainly due to complexities with finding specialized skills and high costs associated with paying them. As a result, you get a burnout team that has to fix bugs rather than innovate, an application with significant security risks, incompatible with modern technologies, and that can’t fit as your business scales.
More and more organizations invest in updating aging software, and the rising value of the global application modernization services market is vivid evidence. It was accounted for USD 20.82 billion in 2024 and is predicted to increase to approximately USD 98.38 billion by 2034.
If you’re looking to start investing in innovation rather than bug fixing and need a reliable agency to work with, you’re on the right page. We’ve gathered 5 companies specializing in legacy systems modernization that can be considered best in the niche.
Corsac Technologies
Corsac Technologies is an application modernization company that focuses on updating legacy software, breaking tech stagnation, and minimizing tech debt that is holding you back. The company implements not just updates of legacy designs but reinvented systems built to stand the challenges of future. They go deeper than code reshaping, helping you rethink the entire business process.
Their expertise is backed by hundreds of successful projects for customers across seven niches. Corsac team works inside your Git, CI/CD (Continuous Integration and Delivery), and workflow tools for maximum business continuity.
Years of Experience: 18+
Location: The United States
Legacy Stacks: Delphi, ColdFusion, COBOL, FoxPro, and many more.
Modern Alternatives: NET Core/.NET, Angular, .NET MAUI, JavaSript
Luxoft
Luxoft is a global software modernization company established in Switzerland in 2000. It delivers a comprehensive approach to legacy system modernization, including strategic consulting, custom software development services, and digital solution engineering to businesses around the world.
Luxoft’s experience spans various niches such as financial services, automotive, communications, and healthcare & life sciences sectors. They deliver a traceable and transparent workflow during the modernization process, along with measurable results that align with your business goals.
Years of Experience: 25
Location: Switzerland
Legacy Stacks: z/OS COBOL, JCL, IMS, CA Gen, and many others
Modern Alternatives: RHEL, Python, others.
Sombra
Sombra is a company that delivers a full range of software product modernization services, from consulting to full-cycle software development. The company engages over 350 vetted developers from around the world – each with solid tech background and vast expertise in advanced technology, such as cloud solutions, AI/ML, data infrastructure, cybersecurity, and more.
Sombra takes pride in completing 98% of projects within the provided timeframes, which demonstrates their commitment to customer satisfaction in niches like edtech, marketing, healthcare, and more. They adhere to clear and transparent workflow, budget-friendly execution, and practical results.
Years of Experience: 12+
Location: Ukraine, Colombia
Legacy Stacks: n/d
Modern Alternatives: NET Core/.NET, Angular, Microservices architecture, TypeScript, React/Vue/Angular, Flutter, ASP.NET Core MVC, C# .NET, JavaScript (ES6+), C#
Transparity
As a certified Microsoft partner, Transparity’s software modernization services are focused on migrating applications from legacy stacks to Microsoft Azure Cloud. Backed by deep technical expertise, the Transparity team holds six Microsoft Partner Designations, Azure Expert MSP recognition, and 18 specialized certifications.
Transparity’s experts work hand in hand with clients to deliver solutions that strengthen and evolve their businesses. They handle the software modernization cycle – from early concept and strategy to implementation and ongoing support. The name Transparity reflects its core values – transformation, partnership, and clarity.
Location: England
Years of Experience: 10+
Legacy Stacks: n/d
Modern alternatives: AWS, Azure, Docker, Python, Java, Node.js, .NET Core, Microservices, and others
Modlogix
Modloogix is helping businesses move legacy software solutions to secure, stable, and scalable platforms, and save their business value. The Modlogix team believes in a granular approach to software modernization that allows them to uncover hidden opportunities in your business in an efficient and cost-effective way.
Their team specializes in system assessments and audits, software reengineering and re-architecting, cloud migration, API integration, and desktop to web migration. The ModLogics’s engineering team attains enhanced performance and data integrity by relying on .NET Core migration, Visual FoxPro modernization, and Angular migration.
Location: United States, Ukraine
Years of Experience 11+
Legacy Stacks: n/d
Modern alternatives Microsoft .NET (C, Visual Basic, FoxPro), Azure, Java, MS Access, SQL Server.
Modernizing your aging application is the favor you owe to your organization. These legacy systems modernization companies will tackle the headache of application upgrade from your shoulders and grant you the freedom to focus on growth, not accumulated tech debt.
