Legacy modernization on AWS
Modernize the systems your business runs on. Prove nothing broke.
Legacy Parity moves COBOL, Java and .NET applications to AWS, and proves with tests that the new system behaves exactly like the old one before anything goes live.
Why Legacy Parity
Proof, not promises
Before cutover, we run the old and new systems on the same inputs and compare every output, record by record. You see the evidence, not a status report.
AI speed, senior judgment
AWS Transform and Claude handle the mechanical code conversion. A principal architect with 40 years in the field makes the decisions that matter: design, data, security and go-live.
Built for regulated work
Your code stays in your AWS account or your source control. Every deployment is automated, reviewed and reversible.
How it works
- Assess
Map the system, find the risks, and get a fixed price for the first phase.
- Design
Agree the target architecture on AWS, and how the data will move.
- Prove
Record how the current system behaves and turn it into automated tests.
- Modernize
Convert the code, build the infrastructure, and pass the tests.
- Cut over
Rehearse the data migration, then go live with a tested way back.
Not sure where to start?
A two-week assessment gives you a map of your system, the risks, and a fixed price for the first phase.