Best Lightweight Vector Databases (2026)
Selected for: low operational overhead — embedded, single-file, or a Postgres extension. Good for prototypes and small projects.
| # | Tool | Stars | PyPI/mo | License | Managed option |
|---|---|---|---|---|---|
| 1 | Chroma | 28,456 | 13,590,061 | Apache-2.0 | Chroma Cloud |
| 2 | pgvector | 21,794 | — | NOASSERTION | any managed Postgres |
| 3 | LanceDB | 10,627 | 7,249,640 | Apache-2.0 | LanceDB Cloud |