Hermes Agent memory (Nous Research) alternatives

Nous Research's open-source self-improving agent keeps an agent-curated MEMORY.md/USER.md notebook injected at session start, full-text (FTS5) search over past sessions that returns raw messages without LLM summarisation, and optional Honcho user modelling. Full Hermes Agent memory (Nous Research) record →

  1. 1 Gemini CLI memory (save_memory / GEMINI.md) Coding-agent memory

    same storage (file) · same retrieval (injection) · same conflict handling (agent) · same memory unit (fact) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ? MCP ✓ ★ 108k released 2026-10-21 Apache-2.0 Compare with Hermes Agent memory (Nous Research) →

  2. 2 LangGraph Persistence Framework-embedded memory

    also in Framework-embedded memory · same storage (relational) · same retrieval (injection, exact-match) · same memory unit (fact) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 43k released 2026-10-16 MIT Compare with Hermes Agent memory (Nous Research) →

  3. 3 Pydantic-AI MemoryTool 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 ✓ ★ 20k MIT Compare with Hermes Agent memory (Nous Research) →

  4. 4 Agno (Phidata) Memory Framework-embedded memory

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

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 43k released 2026-10-21 Apache-2.0 Compare with Hermes Agent memory (Nous Research) →

  5. 5 Vapi (voice agents) Framework-embedded memory

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

    OSS ? Self-host ✓ Managed ✓ MCP ✓ Compare with Hermes Agent memory (Nous Research) →

  6. 6 Microsoft Copilot Memory Platform-provider memory

    same storage (relational) · same retrieval (injection) · same memory unit (fact) · also has MCP

    OSS ? Self-host — Managed ✓ MCP ✓ Compare with Hermes Agent memory (Nous Research) →

  7. 7 Relevance AI Memory Framework-embedded memory

    also in Framework-embedded memory · same retrieval (injection, exact-match) · same memory unit (fact) · also has MCP

    OSS ? Self-host — Managed ✓ MCP ✓ Compare with Hermes Agent memory (Nous Research) →

  8. 8 Voiceflow Memory Framework-embedded memory

    also in Framework-embedded memory · same retrieval (injection) · same memory unit (fact) · also has MCP

    OSS ? Self-host — Managed ✓ MCP ✓ Compare with Hermes Agent memory (Nous Research) →

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.