Legacyleap accelerates application modernization by ~50-70%, while ensuring 100% functionality parity with the legacy application. Its suite of agents supports every phase of app modernization – they assess and document legacy apps, recommend modern stacks, modernize legacy code with Gen AI, and auto-generate test cases.
Legacyleap sets new benchmarks for application modernization initiatives using Gen AI
2-5 days to assess and document the entire legacy application
~70% modernization automated by Gen AI
2x Faster modernization timelines vs. vendors or in-house
100% functional parity, validated and compliant
Legacyleap introduces Modernization 3.0 – with agents handling assessment, documentation, refactoring, rehosting, and validation of legacy apps through a single unified platform.
Assessment Agent
Upload your legacy codebase and generate a comprehensive AI-powered assessment of your application
Technical Debt
Architecture Drift
Security Vulnerabilities
Modernization Hotspots
Documentation agent
Legacyleap acts like an architect who’s been with your application since day 1. It auto-documents your entire legacy application - giving teams functional and technical documentation that is up to date.
Complete System Inventory (SBOM)
API Specs
PRD’s
BRD’s
FSD’s
Integration maps
Recommendation agent
Recommends target architecture, micro services, frameworks/library choices, refactoring opportunities, and a complete migration plan tailored to your stack. Know precisely what to modernize, in what order, with what effort.
Automated Stack Recommendations
Step-by-Step Migration Plan
Modernization agent
Legacyleap converts legacy apps into well-architected, modern applications as a world-class app modernization team would. Seamlessly involves human in the loop to perfect business logic and bring it confidently over the finish line.
Converted Code
Gap Report
To-do List
Pull Requests
Automated PR Review
QA Agent
Agents auto-generate unit, integration, and regression. QA specialists refine them and run directly against live servers. Differential checks confirm legacy-to-modern parity. Expect ~2× faster test creation.
Unit Test Cases
Regression Test Cases
Integration Test Cases
API Test Cases
Legacyleap blends foundation models, compiler tech, and enterprise-specific SLMs with context-aware blueprints. End-to-end modernization is executed with deterministic accuracy, centering around your architecture, and extensible so your teams can innovate on top of our platform.
Lift-and-shift your legacy apps for an instantly modernized runtime
Rehost your legacy applications onto cloud or container platforms using a lift-and-shift migration approach while preserving the existing business logic.
Automate legacy rewrites and focus developers on core business logic.
Legacyleap handles heavy code refactoring at scale, removing boilerplate, decoupling tight modules, and aligning applications with modern architectures.
Upgrade your foundation without redoing everything
Shift to modern platforms with minimal changes, so you can start leveraging cloud-native features like auto-scaling, reduced ops overhead, and better integration.
Turn legacy data into modern, scalable, AI-ready stores
Modernize legacy databases by restructuring schemas, decoupling monolithic data layers, and migrating to NoSQL, cloud-native SQL, or data lakes. The result: elastic, AI-ready architectures that dramatically lower maintenance effort.
Wrap legacy logic into modern, portable containers
Encapsulate your apps in Docker containers for cloud portability, microservice compatibility, and CI/CD readiness - for seamless Kubernetes orchestration and consistent environments across dev, test, and production.
Bring legacy interfaces into the modern era.
Breathe fresh life into legacy apps with modern, intuitive, responsive UI/UX - all without disruptive backend rewrites.
Replace monolith plumbing with clean, scalable layers
Modernize your middleware layer (message brokers, logic layers, API gateways) to make your system becomes modular, scalable, and ready for evolving integration demands.
Lock down legacy risk with modern, adaptive security
Upgrade authentication, encryption, compliance standards, and secure communication layers to ensure your app meets current regulatory requirements.
Choose between full-service delivery or platform access, both built to get you to production faster and safer.
You bring the system. We bring the outcome.
Leverage your internal or SI teams with our platform.
Legacyleap supports modernization across all major enterprise stacks – application, data, and infrastructure + more on request.
Legacy stacks drag every part of the business: slowing product cycles, blocking AI adoption, and putting regulated industries at risk of failure.
Legacy systems keep logic buried in code, expose no APIs, and move data in overnight batches. That makes real AI adoption nearly impossible.
Regulated industries can’t deploy AI without full audit trails, lineage tracking, and explainability.
Competitors with modern stacks are already building AI into their products. Every quarter spent decoding legacy code widens the gap.
AI can’t access decision logic buried in legacy apps. Without visibility into how systems actually work, models can’t learn or automate real workflows.
Hospitals still running HL7 v2 can’t meet FHIR standards. Without REST APIs, OAuth2, or SMART-on-FHIR, patient data can’t legally move across systems.
Interoperability projects stall, funding gets blocked, and HIPAA/GDPR penalties become unavoidable.
GDPR, CCPA, and HIPAA require full lineage – where data came from, where it went, and who touched it. Legacy ETL tools and siloed DBs can’t deliver that.
Compliance officers can’t certify systems, leaving entire platforms classified as non-compliant.
Payment rails are moving to ISO 20022. Legacy cores on 8583 batch jobs will simply stop clearing transactions.
Settlement failures, rejected payments, and guaranteed regulatory non-compliance.
Outdated PHP, Magento 1, and legacy .NET apps can’t meet PCI DSS 4.0. Stronger encryption, auth, and SDLC proof are out of reach.
One failed audit and processors cut you off and revenue stops overnight.
Usecase: Mounting technical debt after years of mergers and acquisitions. Six critical VB6 components were slowing automation, creating scalability limits, and threatening precision hardware communication. Legacyleap delivered a phased, AI-accelerated modernization to .NET
Usecase: A core insurance system buried under 327 VB6 files, 259 forms, 9,612 controls, and 240K+ COM calls had become impossible to scale or maintain. Legacyleap delivered a GenAI-driven migration to C#, eliminating dependencies, consolidating executables, and automating testing.
Usecase: Credit scoring at global scale was trapped in 1.5M+ lines of Ab Initio code – slowing credit product launches and inflating TCO. Legacyleap used GenAI to parse, refactor, and regenerate every transformation into Java Spark + Airflow. Cost dropped 55%, dev cycles ran 60% faster, and they scaled for modern credit workloads.
Pick what suits your team: get export-ready docs from a free code scan, or walk through the platform with our CTO. Either way, you’ll get a clear picture of what Legacyleap can do for your codebase.
Functional & Technical documentation
Architecture diagrams
API references & integration maps
Risk & complexity heatmap
Modernization Timelines & Estimate
Full Modernization Plan
Real-time architecture visualization
SBOM generation
AI-powered code comprehension
Drift detection, and more
Two ways to work with Legacyleap — choose what fits your modernization goals best.
1. Turnkey Delivery
Let our team own the outcome. We use Legacyleap internally to deliver application modernization projects in nearly half the time it takes traditional approaches. No overhead. No uncertainty. Just results.
2. Platform Licensing
Already have a team? License the platform and plug it into your internal workflows or system integrators. You’ll accelerate delivery with guardrails, automation, and AI-powered insights with structure and confidence.
Copilot, Cursor, and similar tools are optimized for greenfield development.
They help you write code faster but they don’t help you understand legacy systems.
Modernization isn’t a codegen problem. It’s a comprehension problem.
You’re dealing with millions of lines of tightly coupled logic, missing documentation, and business workflows embedded across layers.
Legacyleap is purpose-built for this. It parses legacy codebases, maps architecture, flags anti-patterns, and extracts business logic, all with explainable, deterministic outputs.
It’s about surfacing insights your modernization team needs to refactor safely and systematically.
We specialize in the ugly stuff.
Legacyleap supports modernization for high-friction legacy stacks like:
And on the target side, we support everything from .NET 6 and Spring Boot to Snowflake and React.
Whatever your current stack, Legacyleap helps move you forward with explainable automation and stack-specific accuracy.
If you’re stuck with large, fragile, business-critical applications that no one wants to touch, that’s where we come in.
Legacyleap is built for enterprises running legacy codebases like VB6, EJB, classic ASP, or early .NET. These are systems that still drive revenue, but are difficult to modernize without breaking things.
Whether you’re in healthcare, financial services, or logistics — if your business relies on tech that’s aging fast and undocumented, Legacyleap gives you a safe, structured way to modernize without disruption.
Yes, Legacyleap can be deployed entirely within your cloud environment.
All processing happens inside your firewall: from GenAI prompts to code conversion to deployment artifact generation. No source code leaves your infrastructure. No outbound API calls are required.
You stay compliant, secure, and in control.
Our zero-dollar assessment is designed to de-risk your modernization upfront.
You share the codebase, we run a secure analysis, and you receive a complete output pack including architecture maps, dependency graphs, modernization opportunities, functional insights, and known pain points.
It’s a no-obligation entry point that sets you up for a focused pilot when you’re ready.
Here’s a full breakdown of what the $0 Assessment entails →
If you’re ready to move forward, we start with a paid pilot, typically one application or module.
You’ll get first-pass modernized code, auto-generated documentation, test coverage, and deployment artifacts, all produced using the same Legacyleap platform that powers our full-scale projects.
It’s a low-risk, high-impact way to validate outcomes before scaling across your portfolio.
Target stacks:
Get a detailed and personalized cost estimate based on your unique application portfolio and business goals.
