Legacy transformation: Leading technology companies help enterprises modernise outdated applications while reducing technical debt and improving operational efficiency.
Cloud and AI: Modernization providers combine cloud migration, automation, AI and engineering practices to create scalable technology environments.
Enterprise transformation: The right partner depends on legacy complexity, technology requirements, business priorities and long-term digital transformation strategies.
Modernising old technology is no longer just an IT upgrade. For many businesses, it has become necessary to keep applications secure, reduce technical debt and prepare systems for cloud computing, automation and artificial intelligence.
Enterprises are increasingly turning to engineering and IT services companies that can assess legacy systems, migrate workloads, rebuild applications and introduce modern architectures without disrupting day-to-day operations. Industry research continues to highlight several global technology providers for their capabilities in application and legacy modernization.
Here are 10 companies that stand out in the modernization engineering services space:
Accenture has a broad application modernization practice covering legacy assessment, architecture planning, cloud migration, application transformation and mainframe modernization. The company also uses automation and AI-assisted approaches to help enterprises modernise large application estates.
Tata Consultancy Services (TCS) works with large enterprises on application modernization, cloud transformation and legacy technology upgrades. Its scale and global delivery network make it a major provider for organisations managing complex technology environments. TCS was also named a Leader in Forrester’s 2024 assessment of application modernization and migration services.
Infosys takes an AI- and cloud-first approach to modernization. Its services cover legacy applications, mainframes, databases, cloud migration, technology upgrades and the transition of monolithic applications to microservices.
Capgemini helps businesses modernise applications and technology environments while moving toward cloud-native architectures. The company has been recognised among the leading providers in application modernization and migration services.
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HCLTech is another major player in legacy and application modernization. Its services focus on helping enterprises move away from older technology environments while adopting cloud, automation and modern engineering practices. HFS Research included HCLTech among its 2025 Market Leaders.
Cognizant offers end-to-end modernization services, from application assessment and migration to cloud-native transformation. Its Skygrade platform uses automation, modern tooling and generative AI to support large-scale cloud modernization programmes.
IBM Consulting focuses strongly on hybrid cloud and AI-led application modernization. Its services include migrating and modernising existing applications, containerising legacy systems and incrementally improving older applications rather than replacing everything at once.
Wipro provides modernization through rehosting, re-platforming, refactoring and rearchitecting applications. Its services also cover integration and data modernization, with GenAI being used to speed up parts of the transformation process.
EPAM has an engineering-focused modernization practice covering applications, platforms and data. It also uses AI for legacy code migration and documentation, alongside cloud, containerisation and platform engineering capabilities.
LTIMindtree is another notable provider for enterprises looking to modernise legacy and mainframe environments. The company has been included among major application modernization providers assessed by industry research firms.
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Modernization engineering is becoming a long-term technology strategy rather than a one-time migration project. Companies need to balance legacy systems with cloud adoption, AI, security and the need to release software faster.
The right modernization partner will depend on the size of the technology estate, the complexity of legacy applications and the organisation’s cloud and AI roadmap.
For large-scale transformation, companies such as Accenture, TCS, Infosys, Capgemini, HCLTech and Cognizant remain prominent names, while IBM, Wipro, EPAM and LTIMindtree offer additional options across different modernization needs.
What are modernization engineering services?
Modernization engineering services help businesses upgrade legacy applications, migrate systems to cloud platforms, improve architecture, introduce automation, and integrate artificial intelligence while maintaining business continuity and reducing technical debt.
Why do companies need modernization engineering services?
Companies use modernization engineering services to address outdated technology, improve application performance, strengthen security, reduce maintenance costs, support scalability, and create technology environments capable of adapting to changing business requirements.
Which companies provide modernization engineering services?
Leading providers include Accenture, Tata Consultancy Services, Infosys, Capgemini, HCLTech, Cognizant, IBM, Wipro, EPAM Systems, and LTIMindtree, offering different combinations of application, cloud, mainframe, data, and digital engineering modernization capabilities.
How does AI support application modernization?
AI can assist modernization by analysing legacy code, generating documentation, identifying dependencies, suggesting code improvements, automating testing, and accelerating migration activities, helping engineering teams modernise applications more efficiently.
How should businesses choose a modernization engineering partner?
Businesses should evaluate a provider’s legacy technology expertise, cloud capabilities, engineering experience, security practices, AI adoption, industry knowledge, delivery scale, modernization methodology, and ability to support long-term transformation goals.