It is a control plane, not a catalog or a gateway. Not another place to store your data.
| Capability | Custosa | LLM gateways | Data catalogs |
|---|---|---|---|
| Inspects before the model | ✓ | sees prompts only | offline scan |
| Field-level runtime verdicts | ✓ | text only | column, batch |
| Deterministic formal policy | ✓ | keyword / LLM | metadata rules |
| Signed, hash-chained evidence | ✓ | database log | central log |
| Content-free evidence | ✓ | stores I/O | stores profiles |
| Added latency (p99) | ≤50ms target | adds a model call | batch / offline |
LLM gateways see the prompt and route the call. Custosa inspects every field of the record and decides, per field, before the model is reached.
Data catalogs profile columns in a batch and write a report. Custosa makes a fail-closed decision on live data, on the request path, every time.
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