Looking for an open-source alternative to Weaviate? Below are 3 community-built tools that offer similar functionality — all free, open source, and ready to use or self-host. Ranked by GitHub stars.
Chroma is an open-source search and retrieval database designed specifically for AI applications. It enables efficient vector storage, similarity search, and large-scale retrieval necessary for modern machine learning and LLM-powered projects.
Open-source vector similarity search extension for PostgreSQL, enabling efficient and accurate vector-based data retrieval.
Video-based AI memory library for storing millions of text chunks in MP4 files with lightning-fast semantic search, eliminating the need for a traditional database.
The top picks from this list are Chroma, Pgvector, Memvid — all maintained, free to use, and self-hostable.
Yes. Every tool listed here is open source and free to use. Many can be self-hosted on your own infrastructure, which means no subscription fees and full control over your data.
Most of the alternatives listed are self-hostable. Check each tool's page for hosting details, system requirements, and licensing terms.
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