Honcho (Plastic Labs) alternatives

Memory library/service for stateful agents that reasons over stored messages to build 'peer' representations (theory-of-mind style user models) queryable via a dialectic API; used as Hermes Agent's and OpenClaw's user-modelling backend. Full Honcho (Plastic Labs) record →

  1. 1 Letta / MemGPT Dedicated memory layers

    also in Dedicated memory layers · same storage (vector) · same retrieval (agentic, injection) · same conflict handling (llm-arbitrate) · same memory unit (fact, summary) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 3.7k released 2026-10-29 Apache-2.0 Compare with Honcho (Plastic Labs) →

  2. 2 Mem0 Dedicated memory layers

    also in Dedicated memory layers · same storage (vector) · same conflict handling (llm-arbitrate) · same memory unit (fact) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 67k released 2026-09-25 Apache-2.0 Compare with Honcho (Plastic Labs) →

  3. 3 Supermemory Dedicated memory layers

    also in Dedicated memory layers · same storage (vector) · same conflict handling (llm-arbitrate) · same memory unit (fact) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 31k released 2026-10-12 MIT Compare with Honcho (Plastic Labs) →

  4. 4 OpenMemory MCP Claude Code memory mechanisms

    same storage (relational, vector) · same conflict handling (llm-arbitrate) · same memory unit (fact) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ? MCP ✓ ★ 67k Apache-2.0 (mem0 monorepo) Compare with Honcho (Plastic Labs) →

  5. 5 Memori Dedicated memory layers

    also in Dedicated memory layers · same storage (relational, vector) · same retrieval (injection) · same memory unit (fact) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 17k released 2026-05-28 Apache-2.0 Compare with Honcho (Plastic Labs) →

  6. 6 VEKTOR Memory Dedicated memory layers

    also in Dedicated memory layers · same storage (relational, vector) · same conflict handling (llm-arbitrate) · same memory unit (fact) · also self-hostable · also has MCP

    OSS — Self-host ✓ Managed ✓ MCP ✓ ★ 5 released 2026-07-16 proprietary (commercial licence) Compare with Honcho (Plastic Labs) →

  7. 7 Memobase Dedicated memory layers

    also in Dedicated memory layers · same storage (relational, vector) · same retrieval (injection) · same memory unit (profile) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 2.8k released 2025-11-08 Apache-2.0 Compare with Honcho (Plastic Labs) →

  8. 8 Mem0 Security / OpenMemory Memory governance, privacy & safety

    same storage (vector) · same conflict handling (llm-arbitrate) · same memory unit (fact) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 67k released 2026-09-25 Apache-2.0 Compare with Honcho (Plastic Labs) →

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.