5 Best Application Modernization Service Providers in 2026

Are you still using an outdated system? Here are key signs that it’s time to uplevel your legacy before it’s too late:

1. Your app performance is slow and limited by numerous recurring issues
2. Application maintenance becomes more complicated and costly
3. Your internal team is overwhelmed because of constant firefighting instead of growth and innovation
4. You can’t integrate with modern third-party tools
5. Your workflow relies on manual operations, which cause errors and chaos.

Can you relate to at least one of these statements? If so, we strongly recommend selecting a reliable tech partner to start the modernization journey as soon as possible. To be frank, this task is quite challenging.

In this article, I have listed the most trusted, skilled, and reliable application modernization service providers to choose from in 2026. Dive into reading to learn more!

Сorsac Technologies

Backed by 17+ years of experience, this application modernization service provider combines technical expertise with well-organized, transparent project management. With an incremental approach to modernization, they ensure seamless integration of updates. All the enhancements are implemented and carefully tested in a separate environment, so your core operations keep running without interruptions or delays. Corsac Technologies has deep expertise in strictly regulated industries. Almost 90% of their projects are created to meet HIPAA, GDPR, SOC2, ISO27001, and HL7/FHIR standards. They are not an ordinary custom software development company. Their delivery model is entirely focused on full-cycle modernization to help businesses break free from legacy limitations and grow without tech blockers.

Before starting the modernization process, they offer a deep analysis of your legacy, identifying reasons for tech stagnation, security weaknesses, code gaps, hidden costs, potential risks, and growth potential. Based on these insights, they build a reliable modernization strategy tailored exactly to your business specifics, within your budget and available resources. Such an approach makes the modernization process transparent, measurable, and predictable, as clients get a clear roadmap and KPIs to assess progress and the final result. Even after launch, the Corsac developers provide ongoing support. Your internal team will be fully equipped to manage the updated system independently.

 Key Features

• ROI-driven modernization: Focuses on measurable business outcomes, not just technical upgrades.
• Seamless transformation: Eliminates technical debt while minimizing disruption to ongoing operations.
• Cloud migration expertise: Moves legacy systems to scalable cloud-native environments.
• Architecture redesign: Rebuilds outdated systems with modern frameworks and microservices.
• Integration improvements: Enhances interoperability across enterprise applications

Infosys

Infosys was founded in 1981 in India. Today, this application modernization service provider is among the 6 largest Indian tech companies, serving clients in 50+ countries worldwide. This company stands out for its deep expertise in mainframe modernization. That’s why many Fortune 500 companies choose Infosys as a modernization partner. Codebase analysis, refactoring strategies, migration, and other important processes are conducted using AI tools, which help significantly cut delivery time and costs. Besides development, Infosys offers consulting services for secure, data-driven modernization.

Key Features

• AI-first modernization: Embeds generative AI into modernization strategies via Infosys Topaz.
• Cloud-native adoption: Strong partnerships with AWS, Azure, and Google Cloud.
• Microservices & APIs: Enables modular, flexible application ecosystems.
• Low-code/no-code platforms: Accelerates modernization with rapid development tools.
• Industry-specific solutions: Tailored approaches for BFSI, telecom, manufacturing, and healthcare.

Cognizant

This company not only modernizes technology. Their approach helps reimagine the entire business model to keep pace in a fast-evolving digital economy. Cognizant is an official partner of many prominent cloud providers, which enables them to build cloud-native platforms and conduct cloud migration more efficiently.

They specialize in modernization for large enterprises with complex IT departments. Among the industries of their focus are automotive, banking, healthcare, education, retail, manufacturing, and many others. Combining best practices and valuable insights from each industry with AI technologies, Cognizant builds future-ready solutions that drive business growth and innovation.

Key Features

• Cloud-native transformation: Powered by Cognizant Skygrade for faster modernization.
• Automation-led efficiency: AI-driven IT automation reduces costs and improves agility.
• Technical debt removal: Streamlines legacy systems for long-term sustainability.
• Proven ROI outcomes: Documented savings (e.g., $40M for a client) and faster system changes.
• End-to-end services: Covers consulting, migration, optimization, and managed services.

Luxoft

Another highly-skilled and top-rated application modernization service provider that can help you with any modernization request. They offer a full range of services, including comprehensive audits and consulting and custom software development. Thanks to thorough testing, automation and AI-based approach, they modernize mission critical components fast, securely, and without chaos in your core workflow. Banking, capital markets, automotive, telecom, retail, and other industries can get the most benefit by hiring Luxoft as they have a lot of successful cases in these sectors.

Key Features

• Mainframe modernization: Specialized expertise with a 100% success rate in legacy transitions.
• Risk-managed migration: Ensures smooth transitions with minimal business disruption.
• Cloud-native enablement: Moves applications to scalable, secure cloud environments.
• Open-source adoption: Reduces vendor lock-in and enhances flexibility.
• Continuous integration: Implements DevOps pipelines for faster delivery cycles.

Sombra

It’s a huge application modernization service provider with 350 tech experts worldwide. The Sombra team is especially good at advanced technologies, such as cloud solutions, AI/ML, data infrastructure, cybersecurity, etc. Their key priorities are clients’ business needs, transparent processes, adherence to project estimates, and practical results. Their modernization services include AI consulting, cloud infrastructure migration, tech debt reduction, performance optimization, and UI/UX design enhancements.

Key Features

• ROI prioritization: Focuses on modernization projects that deliver maximum business value.
• Market-driven strategies: Aligns modernization with global trends (e.g., $98B market growth forecast).
• Cloud readiness: Prepares applications for secure, scalable cloud deployment.
• Industry focus: Strong expertise in BFSI, healthcare, and data-intensive sectors.
• Tailored modernization: Custom strategies based on client needs and industry compliance.

Future-Ready Enterprises Start With App Modernization

Choosing a reliable app modernization company is more than just a tech decision. It’s about a strong business strategy with long-lasting, valuable outcomes. If you’re ready to start your modernization journey, don’t hesitate to contact one of the mentioned companies right now and book a call to discuss your project goals.