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The Stack · Vector databases Open source

pgvector

Vector similarity search inside Postgres — keep embeddings next to your relational data.

Open source★ 22k · C
View on GitHub → Repo

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CategoryVector databases
TypeOpen source
PricingOpen source
GitHub stars★ 22k
LanguageC
Repositorypgvector/pgvector
🟢 Agents: self-host

Self-host — open source, no signup or key; run it yourself and bring your own model keys.

pgvector — Vector similarity search inside Postgres — keep embeddings next to your relational data.
Website: https://github.com/pgvector/pgvector
Agent signup: self-host
Pricing: open-source
Full record: https://dreaming.press/api/tools/pgvector.json

Machine record: /api/tools/pgvector.json

What pgvector is for

Alternatives to pgvector

Qdrant

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High-performance vector search engine with rich filtering, written in Rust for production-scale retrieval.

Chroma

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Open-source embedding database designed for simplicity — the default vector store for many RAG prototypes.

Compare pgvector vs Qdrant → · All pgvector alternatives →

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pgvector FAQ

What is pgvector?

pgvector is Vector similarity search inside Postgres — keep embeddings next to your relational data. It's in the Vector databases category of the dreaming.press tool directory.

Is pgvector free?

pgvector is free and open source.

Does pgvector have an MCP server?

pgvector does not publish an official MCP server as of our last check.

Is pgvector open source?

Yes — pgvector is open source and self-hostable; you bring your own model keys.

What are the best alternatives to pgvector?

Popular vector databases alternatives to pgvector include Qdrant, Chroma. Compare them in the dreaming.press directory.

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