Legacy systems drain your budget, slow down operations, and create security vulnerabilities, keeping business decision makers always on alert. Outdated applications cost opportunities.
95% of business leaders interviewed believe app modernization is a top priority for the success of their organization, while 75% of respondents claim they have already completed a small-scale renovation.
However, not all application modernization projects succeed or progress to continuous modernization. When you make the decision to renovate, the next big step to take is to decide on the application modernization service provider.
That’s where we’ve come up with this guide that breaks down the top ten best application modernization service providers that have proven records.
Top 10 Application Modernization Service Providers
1. Corsac Technologies
The software engineering company focused on legacy application modernization, cloud migration, refactoring, and system stabilization. For over 17 years on the market, Corsac is known for deep expertise in reducing technical debt and transforming outdated systems into scalable, maintainable architectures.
The company combines technical expertise with a business-first modernization approach, which makes it one of the best application modernization service providers. With Corsac, your system can evolve without disrupting critical processes.
2. Innowise
Founded in 2007, Innowise is a global IT firm with 3,000+ specialists and strong capabilities in cloud transformation, legacy system re-engineering, DevOps, and enterprise software modernization. Serves organizations in a variety of sectors, including finance, healthcare, logistics, manufacturing, and telecom.
3. Accenture
Accenture specializes in mainframe migration and COBOL-systems modernization, relying on a team of senior migration specialists. Accenture combines business strategy with technical expertise, redesigning processes, not just code.
As Andrew Lychuk notes, “Modernization isn’t just about rewriting code. It’s about helping businesses tap into the agility they’ve been missing for years.”
4. Intellias
Intellias is a global engineering and digital consulting company founded in 2002, with 3,000+ specialists across 17 offices in Europe, Asia, and the Americas. Recognized by Forbes, EY, Gartner, IAOP, and Frost & Sullivan, the company delivers high-level legacy modernization, cloud transformation, and custom software for mobility, fintech, telecom, retail, healthcare, and high-tech.
5. Cognizant
Cognizant offers complex application modernization services from cloud-native development and API to microservices and post-release support. Their team emphasizes automation: AI tools accelerate analysis, testing, and migration, reducing project timelines.
Cognizant is a perfect solution for companies seeking cost efficiency and reliable modernization expertise.
6. Radixweb
A 25+ year provider of enterprise-grade modernization services. Over 650 engineers specializing in mainframe migration, re-engineering, UI/UX modernization, cloud transformation, and performance optimization for large-scale legacy systems.
7. Sparkgeo
Sparkgeo is an application modernization provider with deep specialization in GIS and geospatial systems. The company modernizes legacy platforms, rebuilds outdated analytics tools, and migrates workloads to modern, scalable architectures.
Their focused expertise in GIS technologies allows Sparkgeo to upgrade complex location-based systems, improve performance, and redesign platforms for cloud-native environments.
8. Leanware
A software engineering company that delivers GPS/GIS applications, real-time tracking solutions, cloud migration, and modernization of geospatial systems. Leanware is best-suited for both startups and businesses around the world seeking fast, flexible release of modernized applications.
9. GIS-Point
Specialized GIS software provider with hundreds of completed projects. Their expertise covers custom mapping tools, LiDAR processing, 3D terrain modeling, orthophotography, DEM/DTM/DSM, and dedicated GIS development teams for long-term modernization needs.
10. AppIt Ventures
Custom software development company with 1,000+ delivered mobile and web apps. Offers legacy modernization, system rebuilds, database and API redesign, and code audits. They collect in-depth data about your existing software to help you make informed modernization decisions.
Final Thoughts on Application Modernization Service Providers
Legacy systems may be a fit for your business today, but they cannot support you as you scale. A reliable application modernization provider will bring your software into the future with new technologies.
Each company on the list offers app renovation services with a unique blend of engineering expertise and a tailored approach to help you choose the most convenient modernization plan.
As you’re choosing the provider, pick one that resonates with your needs and can align the modernization process with your workflow.
