Modernize one business process at a time
OpenLegacy connects legacy discovery, specification, and runnable modernization in one incremental path. Find the business operations inside your applications, define clear boundaries from evidence in the code, and convert the components that matter most into modern, executable services.
Why legacy modernization programs stall
Your legacy applications hold decades of proven business rules. Yet most programs try to move everything at once, without a clear view of what the code does.
Limited visibility into legacy behavior and dependencies
Business operations, data lineage, and cross-application dependencies are often hidden across COBOL, RPG, maps, copybooks, files, and databases.
Modernization designs are disconnected from the system of record
Teams struggle to turn discovered legacy behavior into reviewable specifications, API boundaries, and implementation decisions.
Big-bang rewrites introduce unnecessary risk
Moving application logic, interfaces, and data together makes it difficult to preserve business behavior and validate each modernization step.
A proven path to modernization, one business process at a time
Every business capability follows the same three steps.
01Reverse engineering
Reverse engineering
Pick a business process and point us to the sources. We discover everything at the source (apps, dependencies, data and screens), then auto-generate a full spec: workflow, business rules, data models and roles.
02Smart integration
Smart integration
Expose your legacy functions as governed APIs, and simulate every change to validate it before anything moves. Legacy and modern systems keep running side by side, with zero disruption.
03Forward engineering
Forward engineering
Rebuild into your target platforms and cloud services. Choose your approach (reimagine, refactor or replatform), your platform and your LLM, with no vendor lock-in.
See how risk-free modernization works
See dependencies before you migrate (no surprises). Modernize in phases with coexistence (no downtime). Deploy modernization-ready services anywhere (no lock-in).
Why teams modernize by business process
You move beyond high-risk rewrite programs. Each increment follows evidence from your code base, so teams modernize logic in manageable steps and validate behavior early.
Logic and data transitions stay independent, so application logic can leave the host before the data does.
Discover and prioritize real business capabilities
Identify operations, group them into candidate domains, trace data paths, and see the dependencies that shape modernization risk.
Turn discovery into an actionable modernization blueprint
Build business-process specifications from discovered operations, identify API integration points, and create runnable artifacts for stakeholder validation.
Modernize incrementally with validation built in
Convert selected CICS/COBOL/BMS, IMS/COBOL/MFS, and RPG/DSPF applications into runnable JVM-based programs, while keeping flexible options for host, sandbox, or modernized data access.
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