Chroma vs pgvector (PostgreSQL Extension)
Side-by-side from the Top 11 ranking of Pinecone vs Weaviate vs Zilliz: 11 Best Vector Databases 2026. Last verified May 31, 2026.
The short answer
Chroma ranks higher on Top 11 (#5 vs #11) for AI engineers building RAG and semantic search at scale. The most developer-friendly choice for getting started with vector search.
At a glance
| Chroma | pgvector (PostgreSQL Extension) | |
|---|---|---|
| Top 11 rank | #5 / Pinecone vs Weaviate vs Zilliz: 11 Best Vector Databases 2026 | #11 / Pinecone vs Weaviate vs Zilliz: 11 Best Vector Databases 2026 |
| Score (out of 9.4) | 8.7 | — |
| Best for | Easiest for developers to start | Vector search inside PostgreSQL |
| Pricing | $ (Free to usage-based) | $ (Open source) |
| HQ | San Francisco, USA | Open Source |
| Founded | 2022 | — |
Chroma
The most developer-friendly choice for getting started with vector search.
www.trychroma.comSee full entry in Pinecone vs Weaviate vs Zilliz: 11 Best Vector Databases 2026
pgvector (PostgreSQL Extension)
A pragmatic choice for adding vector search to an existing Postgres stack.
github.com/pgvector/pgvectorSee full entry in Pinecone vs Weaviate vs Zilliz: 11 Best Vector Databases 2026
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.