# Zep vs LangMem

Both sit in the memory layer with similar commercial terms, so the practical split is language: Zep targets Python and LangMem targets Python.

| | Zep | LangMem |
| --- | --- | --- |
| Licence | Open source | Open source |
| Pricing | freemium | open source |
| Self-hostable | Yes | Yes |
| Languages | Python, TypeScript | Python |
| Install | — | pip install langmem |
| Keys required | ZEP_API_KEY | None |

## Zep — published scores

- LoCoMo: 79.09% — independent, Memori Labs evaluation, 2026-08. https://memorilabs.ai/docs/memori-cloud/benchmark/results/
- LoCoMo: 58.44% — independent, Corrected evaluation, zep-papers #5, 2026-08. https://github.com/getzep/zep-papers/issues/5

## LangMem — published scores

- LoCoMo: 78.05% — independent, Memori Labs evaluation, 2026-08. https://memorilabs.ai/docs/memori-cloud/benchmark/results/

## Full pages

- https://newagent.build/c/zep
- https://newagent.build/c/langmem

## Machine interfaces

- `GET https://newagent.build/api/registry` — every component as JSON
- `GET https://newagent.build/api/vendors` — vendors, with the repo and releases feed to watch
- `GET https://newagent.build/api/advise?q=<plain english>` — recommended stack for a description
- `GET https://newagent.build/api/stack?<layer>=<id>&format=sh|json|md|yml|agents|env` — a stack as files
- `GET https://newagent.build/llms.txt` — the whole registry in one fetch

Any page here also returns markdown if you send `Accept: text/markdown`.