Modernise legacy
systems. Prove
nothing broke.
LegacyLift turns decades-old code into modern, tested software. It learns every business rule, migrates one piece at a time with a person approving each change, and proves the new system behaves exactly like the old one.
Built for banks, government, and the systems that can't go down
Understand it. Migrate it. Prove it.
Most migrations start with guesswork and end with a leap of faith. LegacyLift replaces both.
Replay can teach the migrator, or certify the result. Never both in the same lineage.
A validator that grades a rewrite against the same data that produced it is marking its own homework. LegacyLift keeps the two apart, so a passing score means something to your model-risk team and to an auditor.
Not a translator. A system you can trust.
Rewriting old code is the easy part. Doing it without losing the rules, without a risky cutover, and with proof it still works. That is what a serious migration actually needs.
The business rules survive.
Generic translators convert syntax and quietly lose the intent. LegacyLift carries every rule across (fees, eligibility, the awkward edge cases), each traced back to the decision that set it.
A human signs off, every time.
No big-bang cutover, no black box. The work stops at every piece for a person to approve, edit, or reject. You stay in control of your own system.
Proof, not promises.
Fidelity Replay shows the new system behaves exactly like the old, field by field, and signs the result. Something you can hand to risk and audit that actually holds up.
Months of consultants, or weeks with proof.
Modernising a core system usually means paying specialists to relearn code nobody documented, then hoping the rewrite behaves. LegacyLift does the reading and the proving. Your team does the deciding.
- A team of specialists reading COBOL line by line
- Business logic locked in people's heads
- Big-bang cutover, fingers crossed
- Every rule traced back to the commit that set it
- Risk-scored and migrated chunk by chunk
- Behaviour proven, every merge human-approved
For regulated institutions · independent · fully auditable