Persistent user memory in two endpoints. Synthesized profiles drop straight into a system prompt — no chunks to deduplicate, no ORM to maintain, no embedding pipeline to babysit.
SDKs are convenience wrappers. The contract is REST, the auth is a bearer token, the response is JSON. Two calls do the job; the other two surfaces are there when you need them.
Store a conversation turn, document, note, or meeting transcript. Sanitization + chunking + embedding happen async — request returns in <30ms.
Returns synthesized static + dynamic arrays plus optional relevant chunks. Drop both into a system prompt.
Raw hybrid search (vector + BM25 + RRF). For when you want the chunks, not the profile.
Temporal entity graph extracted during synthesis. People, projects, decisions, with valid-time edges. Pro+.
Every other memory tool returns vector chunks you still have to deduplicate, rank, and trim. Anansi runs a synthesis pass on every ingest and returns a versioned profile that drops directly into your system prompt.
A Claude pass distills accumulated chunks into static facts (stable truths) and dynamic context (current state). Drop both arrays into a system prompt.
Vector + BM25 + reciprocal rank fusion under the hood. Catches semantic matches AND exact lookups. Knobs exposed when you need them.
Notion, Google Docs, Linear, meeting transcripts. OAuth in 2 clicks. Sync runs in the background. The synthesis layer doesn't care where the chunks came from.
Claude, GPT, Llama, Gemini, on-prem. You pick the brain; we're the memory. Bring your own embedding vectors if you've already invested in a pipeline.
An honest read of the memory landscape. Updated when the field shifts.
| capability | anansi | supermemory | mem0 | zep |
|---|---|---|---|---|
| Synthesized profile (system-prompt ready) | ✓ | — | — | — |
| Hybrid retrieval (BM25 + vector) | ✓ | vec only | vec only | ✓ |
| Temporal entity graph | ✓ | ✓ | — | ✓ |
| Built-in connectors | 4 | 8+ | — | — |
| Hosted SaaS (no infra to run) | ✓ | ✓ | OSS | self-host |
| Free tier | 1k ingest/mo | limited | OSS | — |
Usage-metered. Cancel any time via /portal. Free tier is real — 1,000 ingest calls per month, no card.
Anansi didn't weave a new web for every story. Your agent shouldn't build a new mind for every session.
Two function calls. Any LLM. Free tier, no card. Five minutes from signed-up to remembering users in production.