Chroma
Embeddable OSS vector DB with a developer-friendly Python API and zero-config defaults.
- License
- Apache-2.0
- Install
- pip package
- Website
- https://www.trychroma.com
- GitHub
- https://github.com/chroma-core/chroma
pip install chromadb
Weaviate
OSS vector DB with hybrid BM25+vector search and modular embedding adapters.
- License
- BSD-3-Clause
- Install
- pip package
- Website
- https://weaviate.io
- GitHub
- https://github.com/weaviate/weaviate
pip install weaviate-client
When to reach for which
Chroma — Embeddable OSS vector DB with a developer-friendly Python API and zero-config defaults.
Weaviate — OSS vector DB with hybrid BM25+vector search and modular embedding adapters.
Both sit in the Vector Databases category — they're substitutes, not complements. Pick by your install constraint (MCP-native, license, hosting model) and which tag overlap matters most to your stack.