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Lians vs Zep / Graphiti.
Zep / Graphiti is the temporal knowledge graph, scored on the same five invariants we score ourselves. Credit where it's strong, receipts where it isn't.
Credit first
Where Zep / Graphiti is genuinely strong.
Zep is strong at conversational knowledge graphs: bitemporal edges, contradiction invalidation, and temporal filtering.
Regulated-memory eval · last run 2026-07-04
The five invariants.
| Regulated invariant | Lians | Zep / Graphiti |
|---|---|---|
| Stale revision suppressed | pass | partial |
| Point-in-time (as-of) recall | pass | partial |
| Provable erasure (crypto-shred + cert) | pass | partial |
| Lookahead / backtest guard | pass | absent |
| Audit-state snapshot at T | pass | partial |
| Score (pass = 1, partial = ½) | 5.0 / 5 | 2.0 / 5 |
Where the lanes diverge
Different jobs, different guarantees.
The gap is proof: no as-of recall primitive, deletion certificate, lookahead guard, or first-class snapshot API. Lians also adds database-level isolation and write admission.
The honest recommendation
Which should you pick?
Choose Zep for graph-shaped memory. Choose Lians for deterministic time, audit, and proof-producing erasure.
Open methodology
Zep and Graphiti have a public right of reply.
We asked the Graphiti maintainers to review the configuration, evidence, and scoring in public. If a default behavior, documented capability, or result is wrong, we will rerun the adapter and correct this page.