The objections that come up most when teams first hear "we prove your migration lost nothing" — and a straight comparison against the alternatives.
| IronParse parity | Migrator self-check | QA sampling | |
|---|---|---|---|
| Independent of the migrator | Yes | No | Sometimes |
| Field coverage | 100% of fields | Varies | A sample |
| Byte-identical round-trip | Yes | Rare | No |
| Reproducible (same result on re-run) | Deterministic | Varies | No |
| Signed, machine-readable evidence | Parity receipt | No | No |
| Data leaves your perimeter | Never (0 egress) | Varies | Varies |
The party that performed the migration grading its own output isn't independent evidence — it's the same logic checking itself. Auditors and regulators discount self-attestation for exactly that reason. IronParse is a separate, deterministic check at the conversion boundary, so the proof doesn't depend on trusting the converter.
No. A pipeline exiting zero proves it didn't crash, not that the data is faithful — a COMP-3 read as a string still produces a value. Sampling checks a fraction of rows; parity verification covers 100% of elementary fields and includes a byte-identical decode/re-encode round-trip that catches any single-bit error.
No. The engine runs inside your VPC, on your side of the firewall, with zero data egress. The only thing that leaves is the signed parity receipt — no copy of your records in anyone else's cloud, no third-party API call.
Pilots start at $250k, scoped to one policy-admin system or copybook set, delivered with a full parity report and a signed receipt that proves the migration lost nothing, field for field.
COBOL copybooks and fixed-width record layouts, including ACORD AL3 — PIC clauses, REDEFINES, OCCURS DEPENDING ON, and COMP-3 packed decimals. The parse is deterministic and reproducible.
Reconciliation compares aggregates or sampled records after the fact, usually run by the team that did the migration. IronParse verifies fidelity at the field level with a byte-identical round-trip, independently, and emits a signed, machine-readable receipt as evidence. See the Parity Receipt spec.
A signed parity receipt — input and output SHA-256, field counts, and five gate verdicts in one artifact — plus a full parity report your risk and audit teams can stand behind. Read a live receipt to see the format.
Generate a live parity receipt against a sample record, or tell us what you're migrating.
Request a pilot → Live receipt