WannaCry Ransomware affected more than 180000+ computers running outdated Windows XP in more than 150 countries in 2017. Similarly, more than 500 million users are running Windows 10, which has reached the end of life support.
Not only that, COBOL, which is a 55% old language, is the backbone of finance in the US and various other regions. As Metaintro puts it, COBOL is “$3 trillion Code that nobody knows how to solve” even in the age of AI.
These are just some of the many problems the industry is facing; for instance, Walmart and Amazon are reportedly spending 40 %+ on maintaining their existing code and infrastructure.
For the giant of industry, it makes sense to continue with software maintenance and support services for their existing code, tech stack, or tools, but not for everyone. However, as the tech debt grows, it becomes more costly to maintain and keep secure. That’s why most enterprises usually end up choosing legacy modernization services to improve their software without disrupting the business.
But the biggest problem businesses and enterprises have is trusting companies with critical software or tools. More often than not, any hiccup can lead to downtime, productivity loss, and even data loss.
That’s why it’s important that you select only the best out of the top legacy modernization companies in India.
In this in-depth blog, we have shared the list of companies and why they should be on your list for consideration. Let’s start with companies one by one.
Top 10 Legacy Modernization Companies in India
1. Software Experts India
LinkedIn Page: https://www.linkedin.com/company/software-experts-india/about/
Location: Gurgaon, India
Experience: 15 Years+
Core Expertise/USP: Bespoke Enterprise Software Development
Rating: Google Business- 4/5, Clutch- 4.4/5
Notable Clients: M AUTO, Panasonic, Haldiram’s, DECATHLON, & more
Experience: 15 Years+
Systems Worked On: Mobile Web Apps, COBOL, eCommerce, ERP, Financial Platforms, CRM, Web Portals, DAMs, AI, HRMS, CRM, CMS, DMS, SaaS, IoT
Clients/Timezone Served: India, North America, Europe, APAC, Middle East & Africa
Average Project Size According to Clutch: $5,000+
App Modernization Solutions Offered:
Consulting & Audit, Incremental Modernization Services, Cloud Migration & Re-platforming, Code Refactoring & Re-engineering, API Layer & Integration Modernization, Technology Stack Migration, Legacy Software Cybersecurity Support, UI/UX Modernization, Support & Continuous Evolution.
Why Companies Trust Them:
Software Experts India has built a strong reputation for delivering practical, cost-efficient legacy modernization services tailored for growing businesses and mid-sized enterprises.
The company focuses on AI-assisted code refactoring, cloud migration, and microservices transformation, helping organizations modernize legacy systems without disrupting ongoing operations.
In several client engagements, they have successfully:
- Reduced technical debt by modernizing monolithic applications into scalable microservices
- Accelerated deployment cycles through DevOps-driven modernization
- Improved system performance and maintainability for long-term scalability
Unlike large enterprise vendors, they emphasizes a hands-on, agile delivery model, ensuring faster turnaround times and closer collaboration with client teams.
Their approach combines:
- Automated code analysis and modernization tools
- Cloud-native architecture expertise
- Continuous optimization post-deployment
This makes them one of the top legacy modernizaton companies in India that offer the services without the complexity and cost of large-scale consulting firms.
Who Are They Best for:
- Mid-sized businesses undergoing digital transformation
- Startups scaling legacy applications to cloud-native systems
- Companies looking for cost-effective modernization with faster execution
- Organizations needing flexible, agile development teams
The Good
- Agile, hands-on delivery
- AI-assisted modernization tools
- Cost-effective for mid-market
- Direct team access
- Strong COBOL & ERP experience
- Incremental, low-disruption approach
The Bad
- Limited bandwidth for mega-projects
- Smaller brand recognition globally
2. orangemantra
LinkedIn Page: https://www.linkedin.com/company/orangemantra/posts/
Location: Gurugram, India
Experience: 24+ Years
Core Expertise/USP: AI Digital Transformation Company
Rating: Google Business- 4.3/5, Clutch- 4.9/5
Notable Clients: Nestle, IKEA, TVS, BCG, DLF
Systems Worked On: Mobile Apps, Robotics, eCommerce, ERP, CRM, Web Portals, DAMs, AI, HRMS, CRM, CMS, DMS, SaaS, IoT,
Clients/Timezone Served: India, North America, Europe, APAC, Middle East & Africa
Average Project Size According to Clutch: $10,000>
App Modernization Solutions Offered:
App Modernization Consulting, Legacy Cloud Migration, Legacy App Reengineering, Re-Architecting Services, Customized App Recoding, Digital Transformation Services, Cross-Platform Compatibility, Security Regulatory Compliance, Security Enhancement Services
Why Companies Trust Them:
Known for offering AI-based digital transformation orangemantra is one of the top mid-sized enterprise development companies.
With 1000+ projects delivered and 24+ years of software development expertise, they understand the enterprise software development challenges, especially when it comes to providing modernization services.
What sets them apart is its AI-first approach to modernization, where intelligent automation, cloud-native design, and performance optimization are integrated into every stage of the transformation process.
Despite being a mid-sized firm, OrangeMantra has demonstrated the ability to:
- Deliver enterprise-scale modernization projects
- Maintain flexibility for startups and growing businesses
- Offer cost-effective solutions without compromising quality
Their consistently strong ratings across platforms like Clutch and Google further reinforce their credibility as a trusted legacy application modernization services provider in India.
The Good
- Good market reputation of among the users
- Two decades of software development services
- AI-first modernization approach
- Flexible engagement models for all business sizes
- 1000+ projects delivered
The Bad
- Requires upfront and clear deliverables
3. Tata Consultancy Services
LinkedIn Page: https://www.linkedin.com/company/tata-consultancy-services/
Location: Mumbai, Maharashtra
Experience: 58+ Years
Core Expertise/USP: Digital transformation and software development
Rating: Google Business- Google Business- 4.3/5, Clutch- 5/5
Notable Clients: JP Moragan, UIDAI, SIA, Air France-KLM, General Motors,
Systems Worked On: ERPs, COBOL, AWS mainframe modernization, banks,
Clients/Timezone Served: India, North America, Europe, APAC, Middle East & Africa
Average Project Size According to Clutch: $10,000>
App Modernization Solutions Offered: TCS MasterCraft AI-driven cognitive automation, development, and modernization (GenAI-led app modernization)
Why Companies Trust Them:
With the launch of flagship TCS Mastercraft, Tata Consultancy Services now claims to reduce the app modernization cost by 70% with 2x the delivery speed.
According to the various case studies and testimonials, TCS MasterCraft is a highly advanced GenAI and Agentic AI system.
According to TCS’s Global Head Ashvini Saxena’s LinkedIn post on the system’s capabilities, recently, “TCS MasterCraft™ for modernization analyzed 250K LOC, delivering end-to-end documentation and a centralized knowledge repository” for a Sweden-based banking group.
Not just that, being one of the oldest Software development companies in India, TCS has garnered a reputation for being a trustworthy company for big enterprise projects.
Who Are They Best for:
Large B2B and IT Companies with decent budget
The Good
- Proprietary GenAI platform (MasterCraft)
- 70% cost reduction claimed
- Blue-chip client roster
- Deep COBOL & mainframe expertise
- Globally trusted delivery model
The Bad
- Built for large enterprises only
- Expensive for mid-market businesses
- Slow, process-heavy engagements
- Multiple account management layers
4. Infosys
LinkedIn Page: https://www.linkedin.com/company/infosys/
Location: Bangalore, Karnataka
Experience: 44+ Years
Core Expertise/USP: Providing Digital Services, Consulting, and AI first Solutions
Rating: Google Business- 4.7/5, Clutch- N/A
Notable Clients: HSBC, Axis Bank, Nike, Mercedes-Benz, Mars, Kellogg Company
Systems Worked On: Core Enterprise Systems, Mainframe & Legacy Infrastructure, Platform Systems
Clients/Timezone Served: India, North America, Europe, APAC, Middle East & Africa
Average Project Size According to Clutch: N/A
App Modernization Solutions Offered:
Legacy Application Modernization & Migration, Cloud-Native Transformation, Mainframe Modernization, Low-code/No-code Modernization, DevOps & Agile Modernization, Platform-based Modernization (Cobalt, Topaz)
Why Companies Trust Them:
Infosys delivers enterprise-scale legacy modernization using AI-first and cloud-first frameworks, focusing on reducing technical debt, improving agility, and enabling continuous transformation.
Its proprietary platforms, Infosys Cobalt and Infosys Topaz, support:
- AI-driven code analysis and modernization
- Cloud-native migration at scale
- Platform-led application transformation
The company combines:
- Strong hyperscaler partnerships (AWS, Azure, Google Cloud)
- Global delivery model
- Deep experience in large, complex legacy environments
Infosys is also consistently recognized as one of the top legacy modernization companies in India, with top scores in areas like AI, cloud-native engineering, and partner ecosystem capabilities
Who Are They Best for:
- Large enterprises with complex legacy systems
- Organizations undergoing AI-led digital transformation
- Businesses requiring global-scale modernization delivery
- Enterprises prioritizing cloud-native and platform-based transformation
The Good
- Strong hyperscaler partnerships (AWS, Azure, GCP)
- Proprietary AI platforms (Cobalt, Topaz)
- Global delivery at scale
- Deep complex legacy experience
- Consistently top-ranked globally
The Bad
- Not suited for smaller projects
- Premium enterprise pricing
- Limited flexibility for custom needs
- No Clutch profile to verify
5. AppInventive
LinkedIn Page: https://in.linkedin.com/company/appinventiv
Location: Noida. Uttar Pradesh
Experience: 10+ Years
Core Expertise/USP: AI-powered development, custom software, and end-to-end digital transformation for enterprises
Rating: Google Business– 4.7/5, Clutch– 4.6
Notable Clients: Adidas, Americana Group, Domino’s, KFC, Google
Systems Worked On: eCommerce, Healthcare, Mobile Apps
Clients/Timezone Served: India, North America, Europe, APAC, Middle East & Africa
Average Project Size According to Clutch:
App Modernization Solutions Offered: Application Modernization Consulting and Roadmap, Application Reengineering, Application Containerization, Mainframe Modernization, Infrastructure Modernization and Migration, Cloud Migration and Cloud-Native Application Development, DevOps
Why Companies Trust Them:
Appinventiv focuses on end-to-end legacy modernization with a strong emphasis on cloud-native and microservices-based architectures, helping enterprises transition from monolithic systems to scalable environments.
Their approach includes:
- Strategy-led modernization (replatform, rebuild, extend & migrate)
- AI-assisted analysis and modernization planning
- Incremental transformation to reduce risk and downtime
The company has delivered modernization projects across industries like retail, eCommerce, and mobility, including large-scale ERP and customer-facing application transformations.
Case-led outcomes highlight:
- Improved scalability and system performance
- Enhanced user experience through re-architected applications
- Measurable business impact such as increased engagement and conversions
Who Are They Best For
- Enterprises modernizing customer-facing applications (mobile, eCommerce)
- Businesses transitioning from monolithic to microservices architecture
- Companies looking for end-to-end modernization with consulting + execution
- Organizations prioritizing cloud-native and DevOps-driven transformation
The Good
- Strong mobile & eCommerce focus
- AI-assisted modernization planning
- End-to-end consulting + execution
- Solid Clutch rating
- Good client brand portfolio
The Bad
- Limited mainframe experience
- Narrower legacy system coverage
- Better for app-layer, not deep infrastructure
- Relatively newer company
6. HCL Tech
LinkedIn Page: https://www.linkedin.com/company/hcltech/
Location: Noida, Uttar Pradesh
Experience: 50+ Years (30+ Years as IT Company)
Core Expertise/USP: Engineering and R&D Services (ERS)
Rating: Google Business Rating- 4.5/5, Clutch Rating- N/A
Notable Clients: Cisco, Intel, State Farm, The Boeing Company, Unilever, Mattel
Systems Worked On: Mainframe Systems, Java-based Enterprise Applications, Middleware Platforms (e.g., TIBCO), PHP & Legacy Web Applications, Cloud-native & Hybrid Systems
Time Zone Flexibility: Global delivery across multiple time zones
Clients/Timezone Served: India, North America, Europe, APAC, Middle East & Africa
Average Project Size According to Clutch:
App Modernization Solutions Offered, Legacy Application Modernization, Mainframe & Midrange Modernization, Application Migration & Replatforming, Cloud-native Transformation, Application Portfolio Management, DevOps & Agile Modernization, AI-led Code Conversion (AI Force)
Why Companies Trust Them:
HCL Tech delivers AI-led legacy modernization using its AI Force platform, focusing on transforming legacy code into modern, scalable applications with minimal disruption.
Key strengths:
- AI-driven code analysis and conversion into structured business requirements
- Integration with low-code platforms for faster application rebuild
- Support for complex legacy environments (mainframe, middleware, enterprise apps)
Their approach emphasizes:
- Incremental modernization to reduce risk
- Cloud-native transformation for scalability
- Automation-led migration to improve speed and accuracy
HCL Tech is also recognized as a leader in application modernization services, reinforcing its capability in handling large-scale enterprise transformations
Who Are They Best For:
- Large enterprises with complex legacy infrastructure
- Organizations pursuing AI-led modernization at scale
- Enterprises requiring engineering-led transformation
- Businesses focused on cloud-native and platform-based modernization
The Good
- Proprietary AI Force platform
- Deep mainframe & middleware expertise
- 50+ years engineering heritage
- Large enterprise delivery capability
- Strong global client roster
The Bad
- Built for large enterprises only
- Expensive for mid-sized businesses
- No Clutch profile to verify
- Less flexible for custom engagements
7. Wipro
LinkedIn Page: linkedin.com/company/wipro
Location: Bangalore, Karnataka
Experience: 40+ Years Relevant Experience
Core Expertise/USP: Consulting, Engineering research and development , Wipro Technology Services
Rating: Google Business– 4.4/5, Clutch– N/A
Notable Clients: BP, Phoenix Group, Shell, Apollo Hospitals, Domino’s, Salesforce, LinkedIn
Systems Worked On:
Clients/Timezone Served: India, North America, Europe, APAC
Average Project Size According to Clutch: N/A
App Modernization Solutions Offered:
Legacy Application Modernization, Application Portfolio Rationalization (APR), Cloud Migration & Cloudification, Containerization & Microservices Transformation, API-led Integration, DevSecOps & CI/CD Enablement, Data, AI/ML-driven Modernization
Why Companies Trust Wipro:
Wipro offers a consulting-led, cloud-first approach to legacy modernization, combining strategy, execution, and platform-driven transformation.
Their modernization framework includes:
- Application rationalization and system consolidation
- Cloud-native transformation using microservices and containers
- DevOps-driven delivery for faster release cycles
They also integrate GenAI and automation to:
- Accelerate migration and modernization workflows
- Improve code understanding and transformation accuracy
- Enable faster testing and iteration cycles
However, Wipro’s approach is often framework and platform-driven (e.g., FullStride Cloud, MODERN framework), which can lead to:
- Standardized transformation paths
- Higher dependency on proprietary ecosystems
This can work well for large-scale programs but may limit flexibility for highly customized modernization needs.
Who Are They Best For
- Large enterprises looking for consulting-led modernization programs
- Organizations adopting cloud-native and DevOps transformation at scale
- Businesses comfortable with platform/framework-driven execution models
- Enterprises prioritizing standardization and global delivery capability
The Good
- Consulting-led modernization approach
- GenAI & automation integrated
- Strong DevSecOps capability
- Global delivery at scale
- Reputable enterprise client base
The Bad
- Heavy proprietary framework dependency
- Less flexible for custom projects
- Premium pricing, large budgets needed
8. Hexaware Technologies
LinkedIn Page: https://www.linkedin.com/company/hexaware-technologies/
Location: Navi Mumbai, India
Experience: 34+ Years (Founded in 1990)
Core Expertise/USP: Automation-led, AI-driven digital transformation with a focus on cloudification.
Rating: Google Business- 4.7/5, Clutch- N/A
Notable Clients: Air Canada, a global clinical research organization, and a major financial services institution.
Systems Worked On: Mainframe systems, ERP (PeopleSoft, SAP, Oracle), and cloud-native platforms.
Clients/Timezone Served: India, North America, Europe, APAC, Middle East & Africa.
Average Project Size According to Clutch: N/A
App Modernization Solutions Offered:
Cloud Migration & Modernization, Application & Database Modernization, AI-powered Code Analysis, Mainframe Modernization, Cloud-Native Development, Zero Trust Cloud Security Integration
Why Companies Trust Them:
Hexaware is a next-gen automation-led provider that helps enterprises “Automate Everything, Cloudify Everything, Transform Customer Experiences.” A key differentiator is its proprietary Amaze platform, which accelerates application and database modernization on Google Cloud, alongside a deep collaboration with AWS. Their strong client satisfaction is underscored by being ranked #1 for “Value for Money” and #1 in “Application Services” in recent Whitelane studies.
Who Are They Best for:
Mid-to-large enterprises, particularly in Financial Services & Healthcare, seeking a value-focused partner for accelerated cloud migration with measurable cost reduction, who prefer platform-led transformation and cloud-native modernization.
The Good
- Proprietary Amaze platform
- Ranked #1 for value for money
- Strong financial services expertise
- Automation-led, fast delivery
- Deep AWS & GCP partnerships
The Bad
- Platform-dependent approach
- Less ideal outside BFSI & Healthcare
- Mid-to-large clients only
9. Mphasis
LinkedIn Page: https://www.linkedin.com/company/mphasis/
Location: Bengaluru, Karnataka, India
Experience: 33+ Years
Core Expertise/USP: AI-led, platform-driven services with deep domain expertise in BFSI
Rating: Google Business- N/A, Clutch- N/A
Notable Clients: Flagstar Bank
Systems Worked On: Legacy mainframes (including large COBOL codebases), Banking and Financial Systems, Core Enterprise IT.
Clients/Timezone Served: India, North America, Europe, APAC, Middle East & Africa.
Average Project Size According to Clutch: N/A
App Modernization Solutions Offered:
Front2Back Transformation, AI-led Code & Data Conversion, Cloud Migration & Cloud-First Operations, Mainframe Modernization, Application Evolution Management, Unified AI-Driven Transformation
Why Companies Trust Them:
Mphasis is recognized as a Leader in Application Modernization Services by ISG, demonstrating a mature, proven methodology. Their approach, Front2Back™ Transformation, is deliberately non-disruptive, focusing on aligning modernization with core business value. A key technical differentiator is their philosophy of “turning source code into data,” which makes business logic a shared asset rather than remaining locked in legacy systems. Their platforms, like NeoIP™, offer specialized AI agents for continuous modernization across development, IT operations, and business processes.
Who Are They Best for:
Large Financial Services (BFSI) enterprises with highly complex, business-critical legacy systems.
The Good
- ISG-recognized modernization leader
- Specialized BFSI & COBOL expertise
- Non-disruptive Front2Back approach
- AI agents for continuous modernization
- Treats source code as data asset
The Bad
- Very niche BFSI focus
- Not suited for other industries
- No public ratings (Google/Clutch)
- Large enterprise budgets required
10. LTIMindtree
LinkedIn Page: https://www.linkedin.com/company/ltimindtree/
Location: Mumbai, Maharashtra, India
Experience: 30+ Years (Incorporated in 1996)
Core Expertise/USP: Global technology consulting and digital solutions, enabling enterprises to reimagine business models. Strong partnerships with SAP, Microsoft, Google Cloud, and ServiceNow.
Rating: Google Business- 4.4, Clutch- 5/5
Notable Clients: Citi, Lufthansa, Cello
Systems Worked On: ERP (SAP, Oracle JDE, MS Dynamics), CRM (Salesforce), ITSM, VMware environments, Legacy SharePoint, and Documentum
Clients/Timezone Served: India, North America, Europe, APAC, Middle East & Africa
Average Project Size According to Clutch: N/A
App Modernization Solutions Offered:
Legacy Exit & Modernization, Cloud-Native Transformation & VMware Migration, ERP Modernization, Low-Code/No-Code Modernization, iPaaS & API-led Integration
AI-Powered Assessment & Migration
Why Companies Trust Them:
As a digital transformation partner to over hundreds of clients, LTIMindtree brings domain and technology expertise to help drive competitive differentiation. Their modernization strategy is “GenAI-led,” using AI to automate resource-intensive tasks for faster application modernization.
Who Are They Best for:
Very large, global enterprises seeking a scalable, consulting-led partner for complex transformation programs. A strong fit for those in Media, Manufacturing, and Agribusiness looking for AI-led modernization and ERP transformation, often involving significant vendor consolidation.
The Good
- GenAI-led modernization approach
- Perfect Clutch score (5/5)
- Strong SAP & ERP expertise
- Top hyperscaler partnerships
The Bad
- Built for very large enterprises
- Complex vendor consolidation focus
- Not ideal for smaller budgets
- Less flexible engagement models
Why Choose Indian Companies for Your Legacy Modernization Project?
Indian IT companies have been delivering enterprise-scale software work for decades, and legacy modernization is no exception. The combination of deep technical talent, cost efficiency, and time-zone flexibility makes India one of the strongest destinations globally for this kind of work.
That said, not every company that claims to offer modernization services is equally equipped for it. Here’s how to filter properly.
1. Start with a free discovery or consultation session
Most reputable companies offer this, and you should use it fully. Come prepared with a rough brief of your system, what it does, what stack it runs on, how old it is, and what problems you’re experiencing. Use the session to extract a rough project pitch and a ballpark cost. If a company can’t give you even a directional estimate after a consultation, that tells you something.
2. Verify their capabilities, not just their claims
Anyone can put “legacy modernization” on their website. During your consultation, ask for specific examples: have they worked on COBOL systems? Mainframe migrations? Monolith-to-microservices transformations? Ask for case studies that are close to your situation. If they can’t point to concrete work, they’re likely generalists trying to win your project.
3. Ask whether they use AI-assisted development tools
This is no longer optional to ask. The best modernization companies today use AI for automated code analysis, documentation generation, dependency mapping, and refactoring, significantly compressing timelines and reducing human error. Companies like TCS (MasterCraft) and Infosys (Topaz) have built proprietary platforms around this. Smaller firms should at minimum be using tools like GitHub Copilot, Amazon CodeWhisperer, or similar. If a company has no answer to this question, they’re likely slower and more expensive than they need to be.
4. Understand their engagement model
Ask upfront whether they work on a fixed price, hourly, or dedicated team basis, and whether they can flex between models depending on the phase of the project. A discovery and audit phase might suit a fixed price; a long refactoring engagement might be better on a dedicated team model. A company that insists on only one model for everything isn’t thinking about what’s best for you.
5. Request a detailed project timeline with milestones and risk disclosure
Any experienced modernization company should be able to give you a phased plan, not just “we’ll deliver in six months.” Ask them to identify the highest-risk parts of the migration, where delays typically happen, and what their contingency approach looks like. A company that can’t articulate project risks upfront is one that will surprise you with them later.
6. Ask what modernization approach they recommend for your system and why
If they immediately suggest a full rebuild without thoroughly assessing your existing codebase, be cautious. The right company will map your situation to one or more of the 5Rs with clear reasoning, covering both cost and long-term maintainability.
7. Evaluate how the collaboration and communication actually works
Will you have a dedicated project manager? How do you track progress, shared dashboards, weekly calls, sprint reviews? Can you speak directly with the engineers when needed? If they bill hourly, is there a transparent way to verify hours logged? Communication problems don’t improve mid-project; watch for them from the very first interaction.
8. Look at the depth and breadth of what they publicly showcase
A serious modernization company will show you their methodology, not just a list of buzzwords. Check their Clutch profile, their case studies, and what they list as specializations. Are they working across industries similar to yours?
Do they consistently show expertise in the specific systems you’re running, whether that’s COBOL, mainframe, legacy Java ERP, or something else?
9. Ask about after-sales support and maintenance
Many modernization projects don’t end at go-live, they require continued tuning, security patching, and incremental improvements. Ask whether the company offers an ongoing support retainer, and whether that can be built into the engagement from the start. If you’re looking for a more hands-off handover, ask whether they support a Build-Operate-Transfer (BOT) or Build-Transfer model, where they stand up the modernized system and eventually hand full ownership back to your internal team.
10. Check who their typical clients are
Some companies are built for large enterprises with eight-figure budgets; others specialize in mid-market or startup-scale work. Make sure your project size and complexity fits naturally into their typical client profile, you want to be a priority engagement, not an afterthought.
How to Choose One of the Best Legacy Modernization Companies in India
By the time you’ve done your consultations and verified claims, you should be down to two or three strong candidates. Here’s how to make the final call.
First, compare their proposed approach to your system, not their brand or size. A smaller firm that has done exactly what you need is almost always better than a larger firm taking on your work as a new challenge.
Second, compare their transparency. The company that disclosed risks clearly, gave you a realistic timeline, and explained trade-offs honestly during the sales process is likely to behave the same way during delivery.
Third, assess cultural and communication fit. You will be working closely with this team for months, possibly years. If their response times were slow during the pitch phase, or if explanations were vague when you asked pointed questions, those are signals, not one-off incidents.
Finally, ask for a small, bounded pilot engagement before committing to the full scope. Most credible firms will agree to this. It lets you experience their delivery process firsthand without betting your entire modernization budget on assumptions.
The companies listed in this blog, Software Experts India, orangemantra, TCS, and Infosys, represent a strong cross-section of what the Indian market has to offer, from agile mid-sized firms to global delivery giants. The right one for you depends on your system complexity, budget, and how much hand-holding you need through the process.
Use this top legacy modernization companies in India guide as your checklist, and you’ll walk into every conversation prepared to ask the questions that actually matter.
Final Thoughts
Before you reach out to any company on this list, we would recommend to research and understand various approach to software modernization. It will help you ask right questions before you sign anything or pass on critical software to third party agency.
The 5R Approach to Application Modernization
Not every legacy system needs the same treatment. The 5R framework is how most serious modernization companies think about your project, and it’s worth knowing before your first consultation call.
Rehosting is the simplest move. You lift your existing application and shift it to a cloud environment without changing the code or architecture. Often called “lift and shift,” it’s fast and low-risk, but it doesn’t fix the underlying technical debt. It’s best suited for companies that need to exit on-premise infrastructure quickly.
Replatforming goes a step further. You move to the cloud but make targeted optimizations along the way, like switching to a managed database or containerizing specific components. You’re not rebuilding anything, but you’re making the system meaningfully more modern and maintainable.
Refactoring is where real structural change happens. The code and architecture are restructured, often broken from a monolith into microservices, without changing what the application actually does. This approach reduces technical debt significantly and improves scalability, but it requires deeper expertise and more careful execution.
Rebuilding means scrapping the existing codebase and rebuilding the application from scratch using modern technology. The functionality stays the same; everything else changes. This is the highest-effort option but makes sense when the existing system is too fragile or too expensive to keep patching.
Replacing is exactly what it sounds like. Rather than modernizing the existing system, you retire it entirely and adopt a third-party SaaS or off-the-shelf solution that covers the same business need. This is often the most cost-effective path when a well-supported product already exists in the market.
A good legacy modernization company won’t push you toward the most expensive option. They’ll assess your system honestly and recommend the R that fits your budget, timeline, and long-term goals.
FAQs
1. What is application modernization?
Application modernization is the process of updating legacy software systems, including their code, architecture, infrastructure, or platform, to meet current business and technology standards. This can range from moving an application to the cloud to completely rebuilding it using modern frameworks and microservices.
2. Why is application modernization important for businesses?
Legacy systems accumulate technical debt over time, becoming increasingly expensive to maintain, difficult to secure, and unable to integrate with modern tools. Modernization reduces operational costs, improves performance and scalability, strengthens cybersecurity, and enables faster innovation, without rebuilding business logic from scratch.
3. How long does an application modernization project take?
It depends on system complexity, scope, technical debt, and the modernization approach chosen. A simple rehosting (lift and shift) can take weeks. A full refactoring or rebuild of a large enterprise system can take 6–24 months or more. A phased, incremental approach is usually preferred to reduce risk and timeline pressure.
4. What are the key technologies used in application modernization?
Cloud platforms (AWS, Azure, Google Cloud), containerization (Docker, Kubernetes), microservices architecture, AI-assisted code analysis tools, DevOps and CI/CD pipelines, low-code/no-code platforms, API gateways, and GenAI tools like GitHub Copilot or proprietary solutions are used for application modernization.
5. Which are the best application modernization companies in India?
Software Experts India, TCS, and orangemantra are strong choices for mid-sized businesses to enterprises looking for cost-effective, agile modernization.
6. What is an example of legacy modernization?
A bank running core financial logic on a 30-year-old COBOL mainframe migrating that system to a cloud-native microservices architecture is a classic example. Another common example is an eCommerce company breaking apart a monolithic application into independent, scalable services while migrating from on-premise infrastructure to AWS or Azure.
