Lians vs Supermemory.
Supermemory is the universal memory API, scored on the same five invariants we score ourselves. Credit where it's strong, receipts where it isn't.
Credit first
Where Supermemory is genuinely strong.
Supermemory emphasizes fast ingestion, broad connectors, hybrid retrieval, and consolidated user profiles.
Regulated-memory eval · last run 2026-07-04
The five invariants.
| Regulated invariant | Lians | Supermemory |
|---|---|---|
| Stale revision suppressed | pass | partial |
| Point-in-time (as-of) recall | pass | absent |
| Provable erasure (crypto-shred + cert) | pass | partial |
| Lookahead / backtest guard | pass | absent |
| Audit-state snapshot at T | pass | absent |
| Score (pass = 1, partial = ½) | 5.0 / 5 | 1.0 / 5 |
Where the lanes diverge
Different jobs, different guarantees.
It accumulates and ranks. Lians adds write admission, deterministic supersession, as-of recall, and proof-producing deletion.
The honest recommendation
Which should you pick?
Choose Supermemory for consumer apps that need broad, fast ingestion and retrieval. Choose Lians when what's in memory, and what was in memory, carries regulatory weight.
add/search map onto add/recall 1:1; moving means gaining event-time stamps, keyed supersession, and the audit chain without changing your agent loop.