The calm way off the mainframe.
Reverse-engineer the estate, extract the rules with receipts, and forward-engineer what comes next — without waking the systems that run your business.
trusted for CBS/400 · TMS · national registries
the estate
Beneath every bank, every insurer, every government hums an estate the cloud never reached — sixty years of decisions, written in a language the world stopped teaching.
2.1m lines is a Tuesday · the average estate is older than its maintainers
three pressures
Why this stopped being tomorrow’s problem.
The people who can read it are leaving.
The engineers who built these systems are retiring. Every departure takes uncopied knowledge with it — and it isn’t coming back.
Your transformation is stuck behind it.
The ERP program, the cloud program, the merger — every roadmap stops at the same dependency no one can untangle.
Your AI strategy can’t get in the door.
Every AI initiative needs the business logic. The business logic lives in code your models can’t parse and your people can’t explain.
so we set it free
Your most important code is the code no one can read.
PalmDigitalz extracts the business rules trapped in your mainframe — deterministically, with full source lineage — and hands them back to you.
every rule · traced to its source paragraphs · a claim your auditors can click
one waveform · four frequencies
Four instruments. One path.
extraction accuracy · deterministic
rules with full source lineage
scope cut by the dead-code report
research notes
The exit, documented.
pillar · strategy
The Exit Doctrine
Rehost, refactor, replatform, rewrite: the 7 Rs collapsed into the three decisions that actually matter.
pillar · cost
What leaving the mainframe actually costs
MIPS, MLC, people, parallel-run: the full cost anatomy of staying vs leaving — with a calculator.
ai · palmbench
Can AI convert COBOL?
What LLMs get right, where they hallucinate, and why determinism wins audits.
Tell us what your
mainframe is blocking.
Scope a POC
paid proof of concept · your code · your perimeter