The strongest open-source alternatives to Zep for building AI agents — agent memory ranked by GitHub traction, each with a head-to-head.
Short answer: the closest alternative to Zep is Mem0 (★ 63k), the most-starred agent memory; Letta (MemGPT) are also strong.
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Zep (★ 4.8k) is Long-term memory store for agents with a temporal knowledge graph of facts and their validity over time. If it is not the right fit, these 2 agent memory cover the same ground — Mem0 is the most-starred option below. Or browse the best agent memory and Zep's own page.
A memory layer for AI agents — extracts, stores, and retrieves user/agent facts across sessions. Best for personalized agents.
Stateful agents with long-term memory and self-editing context, evolved from the MemGPT research. Best for persistent agents.
Mem0 (★ 63k) is the most-starred agent memory alternative to Zep. A memory layer for AI agents — extracts, stores, and retrieves user/agent facts across sessions.
The strongest agent memory alternatives to Zep are Mem0, Letta (MemGPT) — each with a head-to-head comparison.
Yes — the alternatives listed are open source and free to self-host; you bring your own model keys.
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