OpenSearch alternatives

AWS-led fork of Elasticsearch 7 — Apache-licensed; k-NN plugin, OpenSearch ML, neural-search. Substrate beneath AWS OpenSearch Service. Full OpenSearch record →

  1. 1 Supabase Vector Search platforms (non-memory)

    also in Search platforms (non-memory) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 108k Apache-2.0 (Supabase stack); vectors via… Compare with OpenSearch →

  2. 2 Typesense Search platforms (non-memory)

    also in Search platforms (non-memory) · also open source · also self-hostable · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 27k GPL-3.0 Compare with OpenSearch →

  3. 3 Tantivy Search platforms (non-memory)

    also in Search platforms (non-memory) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ✓ MCP ? ★ 16k MIT Compare with OpenSearch →

  4. 4 Vald Search platforms (non-memory)

    also in Search platforms (non-memory) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ✓ MCP ? ★ 1.7k Apache-2.0 Compare with OpenSearch →

  5. 5 Algolia Search platforms (non-memory)

    also in Search platforms (non-memory) · also has MCP

    OSS — Self-host — Managed ✓ MCP ✓ proprietary (hosted SaaS); open-source API… Compare with OpenSearch →

  6. 6 Quickwit Search platforms (non-memory) ⚠ acquired — acquired by Datadog

    also in Search platforms (non-memory) · also open source · also self-hostable

    OSS ✓ Self-host ✓ Managed ✓ MCP ? ★ 12k Apache-2.0 Compare with OpenSearch →

  7. 7 Sajari (now Search.io) Search platforms (non-memory) ⚠ acquired — acquired by Algolia; now Search.io

    also in Search platforms (non-memory)

    OSS ? Self-host ? Managed ? MCP ? ★ 4 Compare with OpenSearch →

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.