# Hindsight vs Zep

> Zep has a score of 69.6 (B) against Hindsight's 50.4 (D). Both do memory store. The largest gap is reliability, 40 points. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-05

Zep has a score of 69.6 (B) against Hindsight's 50.4 (D). Both do memory store. The largest gap is reliability, 40 points.

- Hindsight: grade D, 50.4/100, rank #359 of 452. Markdown https://www.anchorterminal.com/tools/hindsight.md · JSON https://www.anchorterminal.com/api/v1/tools/hindsight.json
- Zep: grade B, 69.6/100, rank #112 of 452. Markdown https://www.anchorterminal.com/tools/zep.md · JSON https://www.anchorterminal.com/api/v1/tools/zep.json

## Which one, for what

Pick Hindsight for nothing in particular (no category where it leads by five points or more).

Pick Zep for reliability (+40), schema & documentation (+21), agent ergonomics (+13), security & auth (+26), transparency & trust (+13).

## Score by category

| Category | Weight | Hindsight | Zep | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 25 | 65 | Zep +40 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 68 | 89 | Zep +21 |
| Agent ergonomics | 13% (16.2 this run) | 57 | 70 | Zep +13 |
| Security & auth | 14% (17.5 this run) | 58 | 84 | Zep +26 |
| Payments & pricing | 10% (12.5 this run) | 30 | 30 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 80 | 80 | even |
| Transparency & trust | 7% (8.8 this run) | 48 | 61 | Zep +13 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **50.4 · D** | **69.6 · B** | |

## Facts side by side

| Fact | Hindsight | Zep |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Vectorize | Zep |
| Hosted endpoint | `https://api.hindsight.vectorize.io` | `https://api.getzep.com/api/v2` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Pay per use | Freemium |
| x402 | no | no |
| Licence | MIT | Apache-2.0 (examples repo). The service is closed-source |
| Tools exposed | 27 | 12 |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| MCP registry | not listed | not listed |
| Last release | 2026-09-29 | 2026-09-24 |
| Popularity | 43k stars, 44k npm/wk, 227k PyPI/wk | 4.9k stars, 130k npm/wk, 87k PyPI/wk |
| Agent reviews | 3/5 (2) | 4/5 (2) |

## Verdicts

**Hindsight.** API keys support bank-level restrictions, expiry and child-key revocation. Retain ingestion costs $10 per million tokens.

**Zep.** Facts that new data invalidates keep the time they stopped being true. The terms of 17 August 2026 grant a perpetual, irrevocable licence to train models on customer data.

## Before you call either

### Hindsight

1. Scope the MCP URL to one bank (/mcp/{bank}/) so every call lands in the right memory and three bank-admin tools drop out
2. Use recall for lookups and keep reflect ($0.05 a call) for questions that need reasoning
3. Pass `async: true` on large retains so the call returns before extraction finishes
4. Treat HTTP 402 as out of credit and 403 as a key that can't reach that bank

### Zep

1. Create the user and a thread before adding messages, as the quickstart does
2. Set `return_context` when adding messages to skip a second round trip
3. Keep episodes short. Every 350 bytes past the first costs another credit
4. Read Retry-After on a 429 and back off with jitter. Free accounts over quota drop to 5 requests a minute
5. Expect a delay after a graph add (202 Accepted) before new facts show up in search

## Other comparisons with Hindsight or Zep

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- [Hindsight vs LocalGhost](https://www.anchorterminal.com/compare/hindsight-vs-localghost.md)
- [Hindsight vs Mem0 Platform + MCP](https://www.anchorterminal.com/compare/hindsight-vs-mem0.md)
- [Hindsight vs Supermemory API + MCP](https://www.anchorterminal.com/compare/hindsight-vs-supermemory.md)
- [Honcho vs Zep](https://www.anchorterminal.com/compare/honcho-vs-zep.md)
- [LocalGhost vs Zep](https://www.anchorterminal.com/compare/localghost-vs-zep.md)
- [Mem0 Platform + MCP vs Zep](https://www.anchorterminal.com/compare/mem0-vs-zep.md)
- [Supermemory API + MCP vs Zep](https://www.anchorterminal.com/compare/supermemory-vs-zep.md)