HippoRAG / HippoRAG2 alternatives

Hippocampus-inspired RAG. LLMs + knowledge graphs + Personalized PageRank to mimic neocortex/hippocampus roles. NeurIPS 2024. Full HippoRAG / HippoRAG2 record →

  1. 1 HiRAG Retrieval-as-memory hybrids

    also in Retrieval-as-memory hybrids · same storage (graph) · same retrieval (graph-traversal, similarity) · same memory unit (chunk) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ? MCP ? ★ 557 MIT Compare with HippoRAG / HippoRAG2 →

  2. 2 LazyGraphRAG Retrieval-as-memory hybrids

    also in Retrieval-as-memory hybrids · same storage (graph) · same retrieval (graph-traversal) · same memory unit (chunk) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ? MCP ? ★ 35k released 2026-08-21 MIT Compare with HippoRAG / HippoRAG2 →

  3. 3 KAG Retrieval-as-memory hybrids

    also in Retrieval-as-memory hybrids · same storage (graph) · same retrieval (graph-traversal) · same memory unit (chunk) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ? MCP ? ★ 9.0k released 2025-06-28 Apache-2.0 Compare with HippoRAG / HippoRAG2 →

  4. 4 LightRAG Retrieval-as-memory hybrids

    also in Retrieval-as-memory hybrids · same storage (graph) · same retrieval (graph-traversal, similarity) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ? MCP ? ★ 39k released 2026-09-02 MIT Compare with HippoRAG / HippoRAG2 →

  5. 5 RAPTOR Retrieval-as-memory hybrids ⚠ research-code — research code; not maintained as a product

    also in Retrieval-as-memory hybrids · same retrieval (similarity) · same memory unit (chunk) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ? MCP ? ★ 1.8k MIT Compare with HippoRAG / HippoRAG2 →

  6. 6 FLARE Retrieval-as-memory hybrids ⚠ research-code — research code; not maintained as a product

    also in Retrieval-as-memory hybrids · same retrieval (similarity) · same memory unit (chunk) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ? MCP ? ★ 668 MIT Compare with HippoRAG / HippoRAG2 →

  7. 7 GraphRAG (Microsoft) Retrieval-as-memory hybrids ⚠ maintenance — maintenance mode (bug and security fixes only)

    also in Retrieval-as-memory hybrids · same storage (graph) · same retrieval (graph-traversal, similarity) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ? MCP ? ★ 35k released 2026-10-08 MIT Compare with HippoRAG / HippoRAG2 →

  8. 8 Mem0 Dedicated memory layers

    same storage (graph) · same retrieval (graph-traversal, similarity) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 67k released 2026-09-25 Apache-2.0 Compare with HippoRAG / HippoRAG2 →

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.