What are legacy application modernization services?

Legacy application modernization services upgrade aging software so it costs less to run, performs better, integrates with current systems, and is safe to build on. They range from a targeted platform upgrade to a full re-architecture. CISIN delivers these end-to-end: assessment, approach selection from the 6 R's, migration, re-architecture, mainframe modernization, and post-go-live support.

How much does legacy application modernization cost?

Legacy application modernization typically starts in the low five figures for a focused upgrade and increases for multi-application or full re-architecture programs. Costs depend on the size and complexity of the legacy system, the modernization approach, and the project scope. CISIN determines pricing during the assessment and provides a phased budget before development begins.

How long does it take to modernize a legacy application?

A targeted modernization project can take a few weeks, while a complete cloud-native re-architecture may require several months to over a year. CISIN follows a phased modernization approach that keeps existing business systems operational throughout the transition.

What are the main legacy modernization approaches?

The primary legacy modernization strategies are the 6 R's: rehost, replatform, rearchitect, rebuild, replace, and retain or retire. Each approach addresses different technical and business requirements. CISIN evaluates each application component and recommends the most suitable modernization strategy.

What is the difference between replatforming and refactoring?

Replatforming moves an application to a new platform with minimal code changes, such as upgrading the database or runtime. Refactoring improves the existing codebase to enhance performance, scalability, and maintainability without changing business functionality. Replatforming is generally faster and more cost-effective, while refactoring is better suited when the code itself limits future growth.

Should I modernize or rebuild from scratch?

Modernization is the right choice when an application still contains valuable business logic but requires improvements in performance, cost, or integration. Rebuilding is more appropriate when the existing codebase can no longer support business needs. Most enterprise applications benefit from a combination of both approaches, determined through a technical assessment.

What are the risks of legacy modernization, and how do you manage them?

Common risks include business disruption, data loss, loss of functionality, and budget overruns. These risks are minimized through dependency analysis, phased modernization, business rule preservation, comprehensive testing, and parallel system operation until the modernized application is fully validated.

Can you modernize mainframe applications?

Yes. CISIN modernizes mainframe applications through rehosting, replatforming, and re-architecting, including migrations to AWS, Microsoft Azure, and Google Cloud mainframe modernization services while preserving critical business logic. Every project begins with a detailed assessment to determine the most appropriate modernization strategy.

How do you migrate legacy applications to the cloud?

Legacy cloud migration begins by selecting the appropriate strategy, such as rehosting, replatforming, or refactoring. The target environment is configured, application data and components are migrated, and extensive testing is completed before production cutover. CISIN also recommends hybrid or on-premises deployment when it better fits business requirements.

Which industries do you modernize applications for?

CISIN modernizes applications for organizations in banking and financial services, healthcare, retail, manufacturing, and other enterprise industries. While compliance and integration requirements differ by sector, every engagement follows the same structured assessment, modernization, migration, and support process.

How do I choose a legacy application modernization partner?

Choose a modernization partner that performs a thorough assessment before recommending solutions, provides measurable case studies, offers transparent pricing, and demonstrates recognized certifications. CISIN has delivered modernization services since 2003, is CMMI Level 5 appraised, ISO 9001 certified, and scopes every project through a detailed assessment.

What outcomes can I expect from modernization?

Legacy application modernization typically delivers lower maintenance and infrastructure costs, improved performance, higher reliability, better integration capabilities, and a more maintainable codebase. Expected outcomes are defined during the assessment and measured throughout the modernization program.

Legacy Application Modernization Services

Future-Proof Your Core Business with AI-Driven Legacy Application Modernization Services

Our 1000+ in-house experts provide the specialized skills you need to transition. We handle the entire lifecycle, from assessment to post-migration support, freeing your team to focus on innovation, not outdated technology.

Request Free Consultation

Legacy Application Modernization Company

Legacy application modernization is the process of upgrading aging apps so they cost less to run, perform better, integrate with current systems, and are safe to build on. CISIN modernizes legacy applications end-to-end: we assess the existing system, recommend the right approach from the 6 R's, then migrate, re-architect, and support the result.

We have done this since 2003 across mainframe, mid-tier, data, and cloud environments, for organizations from startups to large enterprises. The goal of every engagement is the same: lower risk, lower run cost, and an application your team can keep improving.

How We Choose the Right Approach (the 6 R's)

Rehost: move the application as is to the cloud (lift and shift) for a fast cost and infrastructure win.
Replatform: move apps to a managed or cloud platform with light changes, for example, a database or runtime upgrade.
Rearchitect: restructure the code, often to microservices, when the architecture is the constraint.
Rebuild: rewrite the application when the old codebase can no longer carry the business forward.
Replace: switch to a modern off-the-shelf product when a standard platform fits better than custom code.
Retain or retire: keep or sunset components where modernizing would not pay off. We tell you when not to spend.

Why Choose CISIN As Your Strategic Modernization Partner

You're not just looking for coders; you're looking for a partner who can navigate complexity, mitigate risk, and deliver tangible business value. Here’s why global leaders from startups to Fortune 500 companies trust CISIN to modernize their most critical applications.

Unmatched Process Maturity

We are one of the few service providers globally operating at CMMI Level 5, the highest possible rating for process maturity. This isn't just a badge; it's your assurance that we execute complex projects with unparalleled predictability, quality, and statistical control, dramatically reducing the risk of failure.
Ironclad Security & Compliance

Your data's security is non-negotiable. As an ISO 27001 and SOC 2 certified firm, our security practices are rigorously audited and verified. We embed security into every phase (DevSecOps), ensuring your modernized application is compliant with regulations like GDPR, HIPAA, and PCI-DSS from day one.
100% In-House Expert Teams

We don't use freelancers or contractors. Your project is handled exclusively by our 1,000+ full-time, vetted professionals. This model guarantees accountability, seamless communication, and a stable team with a 95% retention rate, protecting your project from knowledge gaps and turnover.
AI-Augmented Delivery

We practice what we preach. We leverage AI-powered tools for code analysis, dependency mapping, and automated testing. This AI augmentation accelerates your project timeline by up to 50%, identifies risks humans might miss, and results in a more robust, higher-quality final product.
Guaranteed Peace of Mind

We stand behind our talent. We offer a 2-week paid trial to let you experience our team's expertise firsthand. If you're not satisfied, we provide a free replacement with zero knowledge transfer cost. We eliminate the hiring risk so you can focus on the results.
Decades of Proven Experience

Since 2003, we have successfully delivered over 3,000 projects for more than 1,000 clients, including global leaders like Nokia, UPS, and eBay. Our longevity and track record are your proof that we know how to manage complex modernizations and deliver on our promises.
Full IP & White-Label Ownership

Your business logic is your competitive advantage. We ensure you retain full control. Upon final payment, you receive 100% of the intellectual property and source code. We operate as your silent, white-label partner, empowering your brand, not our own.
Flexible, Transparent Engagement

Every project is unique, so we offer flexible engagement models to match. Whether you need a full project team on a Fixed-Fee basis, specialized talent via Time & Materials, or a dedicated cross-functional POD, we provide a model that fits your budget and management style.
Strategic, Not Just Technical

We begin with a free consultation to understand your business goals, not just your technical specs. We translate modernization into business outcomes: lower TCO, faster time-to-market, and new revenue streams. We're your strategic partner in turning technology into a competitive weapon.

Our End-to-end Legacy Modernization Services

We don't offer a single, rigid solution; we provide a comprehensive suite of modernization capabilities. We tailor the right combination of services to meet your specific goals, budget, and risk tolerance, ensuring every action is purposeful and drives measurable value.

Application Portfolio Assessment

We evaluate your application portfolio using AI-driven analysis and expert workshops to map technical debt, interdependencies, and operational costs, delivering a prioritized modernization roadmap.
- Data-Driven Decisions: Rank modernization candidates based on clear ROI and business impact.
- Risk Identification: Uncover hidden dependencies and fragile integrations before development begins.
- Budget Optimization: Focus resources on high-impact applications to maximize modernization value.
Cloud Migration & Re-hosting (Lift & Shift)

Migrate on-premises applications to leading cloud infrastructure (AWS, Azure, GCP) with minimal code changes, providing an immediate boost in uptime, scalability, and operational efficiency.
- Immediate Cost Savings Reduce hardware capital expenditures and lower ongoing server maintenance costs.
- Enhanced Scalability Dynamically adjust application capacity up or down to match real-time user demand.
- Improved Availability Utilize high-availability cloud infrastructure to ensure maximum system uptime.
Application Re-platforming

Upgrade underlying frameworks, OS, or databases to modern, cost-effective alternatives without changing core business logic, achieving high performance at a low risk.
- Performance Boost Unlock faster execution and lower latency by adopting modern execution environments.
- Lower Licensing Costs Transition from costly proprietary software to open-source or cloud alternatives.
- DevOps Readiness Prepare core application components for modern deployment pipelines.
Re-architecting for Microservices

Break down tightly coupled monolithic architectures into flexible, independent microservices that can be built, deployed, and scaled autonomously to maximize business agility.
- Radical Agility: Deploy feature updates independently multiple times a day without full system downtime.
- Targeted Scalability: Scale only the specific microservices experiencing peak load to optimize cloud spend.
- Tech Stack Freedom: Leverage specialized programming languages and databases best suited for each service.
Code Refactoring

Clean up, structure, and optimize your existing codebase without modifying external behavior, significantly reducing technical debt and simplifying future maintenance.
- Reduced Maintenance Costs: Streamline legacy code to make ongoing modifications faster and less expensive.
- Increased Developer Velocity: Allow software teams to build and deploy new capabilities with speed and confidence.
- Improved Stability: Identify and fix hidden code bugs during restructuring to prevent runtime failures.
Application Rebuilding (Redevelopment)

Re-engineer outdated systems entirely from scratch on modern tech stacks, capturing existing business rules while freeing the application from legacy constraints.
- Future-Proof Foundation: Build on cutting-edge, secure architectures engineered for long-term growth.
- Eliminate Technical Debt: Wipe away decades of structural debt with clean, standardized application architecture.
- Optimal User Experience: Redesign workflows to meet modern standards for usability and accessibility.
API Enablement & Integration

Wrap modern, secure API layers around legacy systems to expose isolated data and core functions to cloud services, third-party platforms, and mobile devices.
- Unlock Data Value: Safely share legacy data with modern web apps, mobile solutions, and analytics tools.
- Enable New Revenue: Open new business models by monetizing core APIs and enterprise integrations.
- Improve Automation: Eliminate manual work by seamlessly connecting legacy engines to modern workflows.
Data Modernization & Migration

Safely extract, clean, and transition data from legacy databases and flat files to modern cloud databases, maintaining complete data integrity and compliance.
- Ensure Data Integrity: Apply rigorous automated validation frameworks to guarantee zero data loss.
- Enable Advanced Analytics: Streamline enterprise data for real-time reporting, BI, and machine learning models.
- Reduce Storage Costs: Escape expensive legacy database software through flexible, pay-as-you-go storage.
AI-Powered Code Translation

Utilize generative AI fine-tuned on legacy-to-modern language pairs (e.g., COBOL to Java) under human oversight to accelerate software translation at scale.
- Massive Time Savings: Automate repetitive code rewriting to drastically shorten project delivery schedules.
- Bridge the Talent Gap: Convert obscure legacy logic into widely supported, modern programming languages.
- Preserve Core Logic: Retain complex business rules created over decades with AI-assisted mapping.
Legacy UI/UX Modernization

Replace clunky, outdated interfaces with responsive, modern web and mobile front-ends while keeping backend workflows intact to drive adoption and operational efficiency.
- Increase User Adoption Delight end-users with modern, intuitive, and accessible user interfaces.
- Boost Productivity Simplify complex screen interactions to speed up task completion and lower human error.
- Enhance Accessibility Guarantee compliance with WCAG design standards and multi-device support.
DevSecOps & Container Orchestration

Combine Docker containerization with automated CI/CD pipelines, security scanning, and Kubernetes orchestration to achieve fast, safe, and portable application delivery.
- Accelerate Deployments: Automate build, test, and release processes to deploy features in minutes.
- Cloud Portability: Standardize application packages to run consistently across any cloud or on-prem setup.
- Proactive Security: Integrate automated security scanning and continuous monitoring into early build stages.
Serverless Transformation

Refactor application components to execute on event-driven, serverless infrastructure (e.g., AWS Lambda, Azure Functions), removing all backend server management.
- Extreme Cost Efficiency: Pay strictly for active execution time down to the millisecond with zero idle cost.
- Infinite Scalability: Handle demand spikes effortlessly as cloud platforms scale computing resources automatically.
- Zero Server Overhead: Shift hardware management, OS patching, and maintenance fully to cloud providers.
Mainframe Modernization

Decouple and transition core workloads and data off expensive mainframes onto modern cloud platforms using proven rehosting, rearchitecting, and refactoring techniques.
- Drastic Cost Reduction: Cut high recurring mainframe licensing, hardware, and operational costs.
- Unlock Core Data: Expose critical mainframe logic to cloud services, modern analytics, and web apps.
- Increase Agility: Shift legacy mainframe development toward modern, agile continuous integration models.
Performance Engineering & Optimization

Conduct comprehensive profiling, load testing, and bottleneck identification across your code, database, and infrastructure to ensure sub-second response times.
- Superior User Experience: Provide lightning-fast system performance that keeps digital users engaged.
- Reduce Resource Spend: Fine-tune database queries and code logic to minimize cloud compute consumption.
- Guaranteed Scalability: Verify system readiness for heavy traffic spikes under real-world conditions.
Post-Modernization Managed Services

Maintain continuous system health post-launch with 24/7 monitoring, security patching, incident management, and continuous feature updates to keep systems modern.
- Ensure Business Continuity: Minimize downtime risks through around-the-clock system monitoring and response.
- Free Up Internal Teams: Delegate ongoing maintenance so internal talent can focus on core innovations.
- Continuous Improvement: Receive ongoing optimization recommendations to keep tech stacks up to date.

Case Studies: Real-World Modernization Success

Financial Technology (FinTech)

From Monolith to Microservices: How a FinTech Leader Achieved 10x Scalability and 99.99% Uptime Read more →

Healthcare

Unlocking Interoperability: How a Hospital Network Modernized its EHR for Better Patient Outcomes and HIPAA Compliance Read more →

Insurance

From COBOL to the Cloud: How an Insurer Migrated 5 Million Lines of Code and Bridged the Talent Gap Read more →

Client Testimonials: True Outcomes from Real Studio Leaders

Frank Castillo

VP of Production

"CISIN helped us meet a critical launch deadline for our flagship title. Their AI-powered QA POD identified thousands of critical bugs our internal team completely missed. Backed by CMMI Level 5 professionalism, they proved to be a true strategic partner rather than just a software vendor."

Brenda Holloway

Founder & CEO

"Partnering with CISIN for our NPC AI was the single best decision we made. Their team delivered an emergent behavior system we thought was only possible for AAA budgets. They gave us a massive competitive edge that continues to pay dividends in player reviews."

Tim Page

Head of Monetization

"The analytics and dynamic difficulty systems CISIN built increased our Day-30 retention by 15% and ARPPU by 10%. Their ability to convert player data into actionable mechanics is unparalleled. They delivered a technical solution that directly maximized our bottom line."
Alice Munroe

Director of Global Training & Development

"CISIN built a technically brilliant simulation with incredibly lifelike, AI-driven surgical training scenarios. They navigated our complex corporate procurement protocols seamlessly. Their strict ISO 27001 and SOC 2 compliance gave our team absolute peace of mind."

Walter Bishop

Chief Technology Officer

"We engaged CISIN’s AI/ML Rapid-Prototype Pod to explore generative art pipelines. In four weeks, they delivered a functional prototype that cut environment asset creation time by 60%. Their technical speed and clear communication were phenomenal."

Stewart Woods

Co-Founder & Head of Economy

"Integrating AI with Web3 requires deep technical precision. CISIN built our automated anti-fraud systems and verified NFT credential engines seamlessly. Their framework protected our player-owned token economy from manipulation, delivering true stability to our ecosystem."

Our Process: From Vision to Intelligent Reality

Refined across 3,000+ successful projects, our CMMI Level 5-certified methodology guarantees absolute clarity and predictability. We turn your ambitious vision into a market-ready product with maximum operational efficiency.

Step 1: Assessment Step 2: Approach and plan Step 3: Modernization Step 4: Validation and support

Step 1: Assessment

We audit the legacy app and system, its architecture, dependencies, and code, and identify the risks and the highest-value targets.

Step 2: Approach and plan

We map each component to one of the 6 R's, choose the technologies, and produce a staged plan, a budget, and a risk plan.

Step 3: Modernization

We execute in stages, keeping the current system running, with documentation and testing at each step.

Step 4: Validation and support

We run user acceptance testing, train administrators and users, then monitor, patch, and improve the modernized application.

Ready to Accelerate Your Game Development?

Stop letting production bottlenecks kill your creative vision. Partner with our CMMI Level 5 AI experts and build a smarter game, faster.

Request Free Consultation

Our Advanced Technology Stack

Cloud Platforms: Scalable cloud infrastructure hosting, deployment, and migration services.

AWS Microsoft Azure Google Cloud Platform
Containerization: Portable application deployment and automated container orchestration solutions.

Docker Kubernetes
Databases: High-performance data storage, management, and caching relational/non-relational systems.

Oracle PostgreSQL MySQL MongoDB Microsoft SQL Server Redis
CI/CD & DevOps: Automated software delivery pipelines, infrastructure as code, and continuous deployment.

Jenkins GitLab GitHub Actions Terraform Ansible
Programming Languages: Core frameworks and modern languages for robust application software development.

Java Python .NET Node.js Go PHP
Key Partners: Enterprise software platforms for ERP, content management, and e-commerce solutions.

SAP Drupal Magento Odoo

Featured

Meet Your Expert Team

Partner with seasoned, world-class AI pioneers and game industry veterans. Our leadership team combines deep technical innovation with strategic execution to ensure your project delivers predictable, high-impact results.

Vikas J.

Cyber Security Specialist

Threat Analysis & Vulnerability Management DevSecOps Integration & Compliance Enterprise Security Frameworks (ISO 27001, SOC 2)

Vikas drives the implementation of secure software development lifecycles, DevSecOps frameworks, and regulatory compliance (such as GDPR, HIPAA, and PCI-DSS) across modernized systems. He ensures that legacy applications are hardened against advanced threats during transformation while maintaining strict adherence to enterprise security standards.
Vishal N.

Certified Hyper Personalization Expert

Data-Driven Customer Journey Optimization AI & Machine Learning Personalization Frameworks Behavioral Analytics & Segmentation

Vishal focuses on upgrading aging front-end systems and enhancing user adoption through modern UI/UX methodologies. He utilizes advanced analytics and modern application interfaces to translate complex data signals into streamlined, accessible, and high-performing user experiences.
Akeel Q.

Certified Cloud Solutions Expert

Multi-Cloud Architecture & Strategy Enterprise Cloud Migration & Security High-Performance Infrastructure Design

Akeel brings deep expertise in designing and deploying secure, enterprise-grade cloud environments. He specializes in architecting scalable multi-cloud solutions on platforms like AWS, Azure, and Google Cloud, providing the resilient infrastructure foundation required for seamless legacy application migration and re-hosting.
Girish S.

Delivery Manager & Solutions Architect

Enterprise Project Governance & Delivery Scalable System Architecture & Integration Cross-Functional Team Leadership

Girish oversees complex legacy modernization lifecycles, ensuring alignment between strategic business goals and rigorous architectural execution. He leverages his extensive background in multi-tier system integration and CMMI Level 5 process discipline to manage high-performing engineering delivery pods smoothly.

Flexible and Transparent Delivery Frameworks

We understand that every project has unique needs, budgets, and goals. That's why we offer flexible engagement models designed to provide the right level of support and expertise for your specific situation.

Proof (Stat Band and Case Studies)

Stat band (confirm figures): in business since 2003
- 1000+ in-house engineers
- CMMI Level 5 appraised
- ISO 9001 certified
Mainframe

CISIN rehosts, replatforms, and re-architects mainframe workloads, including moves to managed mainframe-modernization services on Azure, AWS, and Google Cloud, while preserving the business logic the organization depends on.
Cloud migration

we select a migration strategy per application (rehost, replatform, or refactor), configure the target cloud environment, migrate the data and components, then test before cutover. Cloud is the platform for modernization where it lowers cost or adds capability, not the goal in itself.

→

Legacy Application Modernization Services

Future-Proof Your Core Business with AI-Driven Legacy Application Modernization Services

Legacy Application Modernization Company

How We Choose the Right Approach (the 6 R's)

Why Choose CISIN As Your Strategic Modernization Partner

Unmatched Process Maturity

Ironclad Security & Compliance

100% In-House Expert Teams

AI-Augmented Delivery

Guaranteed Peace of Mind

Decades of Proven Experience

Full IP & White-Label Ownership

Flexible, Transparent Engagement

Strategic, Not Just Technical

Our End-to-end Legacy Modernization Services

Application Portfolio Assessment

Cloud Migration & Re-hosting (Lift & Shift)

Application Re-platforming

Re-architecting for Microservices

Code Refactoring

Application Rebuilding (Redevelopment)

API Enablement & Integration

Data Modernization & Migration

AI-Powered Code Translation

Legacy UI/UX Modernization

DevSecOps & Container Orchestration

Serverless Transformation

Mainframe Modernization

Performance Engineering & Optimization

Post-Modernization Managed Services

Case Studies: Real-World Modernization Success

Financial Technology (FinTech)

Healthcare

Insurance

Client Testimonials: True Outcomes from Real Studio Leaders

Our Process: From Vision to Intelligent Reality

Step 1: Assessment

Step 2: Approach and plan

Step 3: Modernization

Step 4: Validation and support

Ready to Accelerate Your Game Development?

Our Advanced Technology Stack

Featured

Meet Your Expert Team

Vikas J.

Vishal N.

Akeel Q.

Girish S.

Flexible and Transparent Delivery Frameworks

Proof (Stat Band and Case Studies)

Mainframe

Cloud migration

Frequently Asked Questions (FAQs)