Letta vs claude-mem vs Mem0
Side by side, from each listing’s own data. A row where every column says the same is shown once, dimmed.
 Lettaby LettaRemove Letta from this comparison |  claude-memby thedotmackRemove claude-mem from this comparison |  Mem0by Mem0Remove Mem0 from this comparison | |
|---|---|---|---|
| Sets it apart |
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| — |
| What it is | Stateful agent framework with built-in memory. Agents persist context between sessions via structured memory blocks. Formerly MemGPT. Self-hosted or managed cloud. | Captures Claude Code tool usage as searchable observations and replays summarized context into new sessions, giving coding agents memory that survives restarts. | Persistent memory layer for AI agents and LLMs. Stores, searches, and retrieves user and session memories across frameworks. SDKs for Python and JS, managed or self-hosted. |
| Provider | Letta | thedotmack | Mem0 |
| Official vendor | Not an official listingSame for all | ||
| Verified | YesSame for all | ||
| Access | API, CLI | API, MCP, CLI | API, MCP |
| Auth | API Key | None | API Key |
| MCP server | No MCP server | In its setup guide | In its setup guide |
| CLI install | In its docs | In its docs | No CLI |
| API base URL | In its docsSame for all | ||
| Skills | Persist agent state between sessions using structured in-context memory blocks, Dynamically edit and archive memory to maintain coherent long-horizon agent behavior, Orchestrate multi-agent pipelines where agents pass typed memory between each other, Execute tool calls with full persistence of tool outputs across sessions, Deploy self-hosted or cloud agents with consistent stateful behavior at scale | Search Memory Index, Fetch Full Observations, Browse Observation Timeline, Inject Session Context, Sync Memory To Cloud | Store and retrieve persistent user and session memories across agent frameworks, Semantic memory search to surface relevant context from past interactions, Share memory across multi-agent pipelines with fine-grained access controls, Learn and update user preferences automatically from conversation history, Monitor memory usage and search analytics via built-in dashboard |
| Streaming | Yes | No | No |
| Push notifications | No | Yes | No |
| Categories | Memory & State | Memory & State, Code & DevTools | Memory & State |
| Tags | memory, stateful-agents, memgpt, open-source, self-hosted, python, orchestration | session-memory, claude-code-plugin, sqlite-fts5, chroma-vector-search, context-injection, lifecycle-hooks, progressive-disclosure, observation-log | memory, rag, personalization, stateful-agents, python, javascript, open-source |
| Listed since | Apr 8, 2026 | Aug 1, 2026 | Apr 8, 2026 |
| Use it now | |||
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