GraphRAG (Microsoft) alternatives

Modular graph-based RAG. Leiden community detection over knowledge graph; community summaries at multiple levels. DRIFT Search hybrid (Oct 2024). Full GraphRAG (Microsoft) record →

  1. 1 REALM Retrieval-as-memory hybrids ⚠ research-code — research code; not maintained as a product

    also in Retrieval-as-memory hybrids · same storage (vector) · same retrieval (similarity) · same memory unit (document) · also open source

    OSS ✓ Self-host ? Managed ? MCP ? ★ 1.8k Apache-2.0 Compare with GraphRAG (Microsoft) →

  2. 2 HyDE Retrieval-as-memory hybrids ⚠ research-code — research code; not maintained as a product

    also in Retrieval-as-memory hybrids · same storage (vector) · same retrieval (similarity) · same memory unit (document)

    OSS — Self-host ? Managed ? MCP ? ★ 582 Unlicensed Compare with GraphRAG (Microsoft) →

  3. 3 Atlas Retrieval-as-memory hybrids ⚠ research-code — research code; not maintained as a product

    also in Retrieval-as-memory hybrids · same storage (vector) · same retrieval (similarity) · same memory unit (document)

    OSS — Self-host ? Managed ? MCP ? ★ 560 CC-BY-NC 4.0 Compare with GraphRAG (Microsoft) →

  4. 4 LongRAG Retrieval-as-memory hybrids ⚠ research-code — research code; not maintained as a product

    also in Retrieval-as-memory hybrids · same storage (vector) · same retrieval (similarity) · same memory unit (document) · also open source

    OSS ✓ Self-host ? Managed ? MCP ? ★ 248 MIT Compare with GraphRAG (Microsoft) →

  5. 5 Reflect Personal AI / PKM / lifelogging memory

    same storage (graph, vector) · same retrieval (graph-traversal, similarity) · same memory unit (document) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ✓ MCP ? ★ 1.5k MIT Compare with GraphRAG (Microsoft) →

  6. 6 LightRAG Retrieval-as-memory hybrids

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

    OSS ✓ Self-host ✓ Managed ? MCP ? ★ 39k released 2026-09-02 MIT Compare with GraphRAG (Microsoft) →

  7. 7 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 GraphRAG (Microsoft) →

  8. 8 m_flow (M-Flow) Retrieval-as-memory hybrids

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

    OSS ✓ Self-host ✓ Managed ? MCP ✓ ★ 4.5k released 2026-08-03 Apache-2.0 Compare with GraphRAG (Microsoft) →

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.