In-process analytical database whose vss extension adds an HNSW vector index — vector search alongside your columnar analytics.
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Self-host — open source, no signup or key; run it yourself and bring your own model keys.
DuckDB — In-process analytical database whose vss extension adds an HNSW vector index — vector search alongside your columnar analytics.
Website: https://github.com/duckdb/duckdb
Agent signup: self-host
Pricing: open-source
Full record: https://dreaming.press/api/tools/duckdb.jsonMachine record: /api/tools/duckdb.json
Embedded, in-process vector database on the columnar Lance format — versioned, updatable, larger-than-RAM retrieval with no server.
A single-file SQLite extension for vector search — exact brute-force KNN that lives inside the database you already ship.
Vector similarity search inside Postgres — keep embeddings next to your relational data.
DuckDB is In-process analytical database whose vss extension adds an HNSW vector index — vector search alongside your columnar analytics. It's in the Vector databases category of the dreaming.press tool directory.
DuckDB is free and open source.
DuckDB does not publish an official MCP server as of our last check.
Yes — DuckDB is open source and self-hostable; you bring your own model keys.
Popular vector databases alternatives to DuckDB include LanceDB, sqlite-vec, pgvector. Compare them in the dreaming.press directory.
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