Pydantic-AI MemoryTool alternatives

Pydantic AI Harness ships a Memory capability: a MEMORY.md notebook plus extra Markdown notes, exposed via write/read/delete/search memory tools and auto-injected into context; backends InMemory, File, SQLite, Postgres with per-user namespaces. Full Pydantic-AI MemoryTool record →

  1. 1 Hermes Agent memory (Nous Research) Framework-embedded memory

    also in Framework-embedded memory · same retrieval (agentic) · same memory unit (fact) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ? MCP ✓ ★ 256k released 2026-10-22 MIT Compare with Pydantic-AI MemoryTool →

  2. 2 LabGenius Vertical / domain-specific AI memory

    same storage (proprietary) · same retrieval (agentic) · same memory unit (fact) · also offered managed

    OSS ? Self-host — Managed ✓ MCP ? Compare with Pydantic-AI MemoryTool →

  3. 3 Letta / MemGPT Dedicated memory layers

    same retrieval (agentic) · same memory unit (fact) · also open source · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 3.7k released 2026-10-29 Apache-2.0 Compare with Pydantic-AI MemoryTool →

  4. 4 CrewAI Memory Framework-embedded memory

    also in Framework-embedded memory · same memory unit (fact) · also open source · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 51k released 2026-10-14 MIT Compare with Pydantic-AI MemoryTool →

  5. 5 LangGraph Persistence Framework-embedded memory

    also in Framework-embedded memory · same memory unit (fact) · also open source · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 43k released 2026-10-16 MIT Compare with Pydantic-AI MemoryTool →

  6. 6 Agno (Phidata) Memory Framework-embedded memory

    also in Framework-embedded memory · same memory unit (fact) · also open source · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 43k released 2026-10-21 Apache-2.0 Compare with Pydantic-AI MemoryTool →

  7. 7 OpenAI Agents SDK Memory Framework-embedded memory

    also in Framework-embedded memory · same memory unit (fact) · also open source · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 29k released 2026-10-15 MIT Compare with Pydantic-AI MemoryTool →

  8. 8 Google ADK Memory Framework-embedded memory

    also in Framework-embedded memory · same memory unit (fact) · also open source · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 21k released 2026-08-07 Apache-2.0 Compare with Pydantic-AI MemoryTool →

Ranked by shared memory design (storage, retrieval, conflict handling, memory unit), same section and shared must-haves (open source, self-hosting, MCP), with adoption as a tie-breaker. ✓ confirmed · — no · ? not in the catalog yet. Want picks for your own requirements? Use the chooser. Checking a whole project? Check your stack.