Top 7 Application Modernization Companies in 2025

As the digital transformation wave continues to reshape industries, enterprises are prioritizing application modernization services to stay competitive, agile, and secure. Legacy systems, though once powerful often become bottlenecks, limiting innovation and scalability. In 2025, modern businesses are seeking cutting-edge legacy application modernization to embrace cloud-native technologies, improve performance, and reduce operational costs.

To help you choose the right technology partner, we’ve curated a list of the top 7 application modernization companies in 2025 that specialize in legacy software modernization services and deliver outstanding results across industries.

1. Accenture

Accenture stands at the forefront of legacy system modernization services, offering end-to-end transformation strategies tailored for enterprises across the globe. Their unique approach integrates AI, automation, and cloud platforms to ensure seamless modernization of outdated applications. Accenture’s global reach and deep industry expertise make them a top choice for Fortune 500 companies.

Why they stand out:

• Agile-driven transformation models

• Cloud-native replatforming solutions

• Focus on cybersecurity during modernization

2. Cognizant

Cognizant has carved a niche in legacy application modernization services by helping businesses shift from monolithic legacy systems to microservices and container-based architectures. Their modern approach ensures scalability, security, and reduced technical debt.

Key strengths:

• Strong cloud partnerships (AWS, Azure, Google Cloud)

• Data-driven modernization strategies

• Industry-specific software modernization services

3. IBM Consulting

A pioneer in digital transformation, IBM offers holistic application modernization services through its Red Hat OpenShift platform. Their deep integration capabilities and AI-enabled tools support even the most complex legacy software modernization services.

What makes IBM a leader:

• Open-source innovation with enterprise-grade support

• Seamless integration with existing systems

• Advanced analytics and automation integration

4. Infosys

Infosys provides robust software modernization services designed for scale and speed. Leveraging their Live Enterprise framework, Infosys helps companies transform legacy systems into modern, cloud-first architectures without disrupting operations.

Modernization highlights:

• Legacy code analysis and optimization

• API-first reengineering approaches

• Proven frameworks for large-scale legacy transformations

5. Tata Consultancy Services (TCS)

TCS offers comprehensive legacy system modernization services that prioritize business continuity, cost-efficiency, and performance. Their proprietary tools and methodologies streamline the modernization of legacy platforms into modern ecosystems.

TCS capabilities include:

• Mainframe and mid-range system modernization

• Cloud enablement and platform rehosting

• Industry-specific compliance and governance solutions

6. Capgemini

Capgemini provides dynamic legacy application modernization services focusing on cost reduction and accelerated time-to-market. Their collaborative approach helps clients revamp core applications and move toward next-gen digital platforms.

Why choose Capgemini:

• Cloud-first modernization strategies

• Advanced DevOps and automation tools

• Business-focused transformation models

7. PPTS Solutions

Emerging as a reliable digital transformation partner in 2025, PPTS Solutions is making waves in the field of application modernization services. With tailored solutions for legacy application modernization, they combine functional expertise with next-gen tech stacks to reinvent business operations.

What PPTS Solutions brings to the table:

• Customized software modernization services for SMEs and enterprises

• Strong emphasis on UI/UX transformation during modernization

• Dedicated focus on security and scalability

Why Application Modernization is Crucial in 2025

The demand for legacy software modernization services is surging due to several key drivers:

• Scalability: Modern apps scale with ease to support growing business demands.

• Security: Legacy systems are vulnerable to breaches; modernization ensures compliance and robust protection.

• Integration: Modern apps easily integrate with APIs, third-party tools, and cloud ecosystems.

• Performance: Legacy applications often suffer from latency and inefficiency—modern solutions bring agility.

Final Thoughts

Choosing the right partner for legacy system modernization services can define your organization’s future. Whether you're aiming to rehost, refactor, or completely rebuild, these top 7 companies have the tools, experience, and vision to guide your digital journey.

As businesses evolve, so should the technology that powers them. Don’t let outdated systems hold you back, invest in application modernization services that drive performance, innovation, and growth.