Comparison
pgvector vs weaviate
A neutral, constraint-first comparison - live GitHub stats and typed relationships, not marketing.
| pgvector | weaviate | |
|---|---|---|
| Tagline | Open-source vector similarity search for Postgres | Open-source vector database for semantic search |
| Stars | 22k | 17k |
| Forks | 1.2k | 1.3k |
| Open issues | 14 | 579 |
| Language | C | Go |
| License | Other | BSD-3-Clause |
| Last pushed | Jul 7, 2026 | Jul 8, 2026 |
| Categories | Data & Retrieval | Data & Retrieval, Vector Databases |
| Trust and health | ||
| Maintenance | Very active (96%) | Very active (96%) |
| Days since push | 0d | 0d |
| Archived on GitHub | No | No |
| Stars delta | - | - |
| Open issues delta | - | - |
| Fork status | Not a fork | Not a fork |
| Owner type | Organization | Organization |
| Security scan | Not scanned | Not scanned |
| Full report | Trust report | Trust report |
| Typed relationship | pgvector alternative weaviate | |
Choose pgvector if…
- More widely adopted - 22k stars vs 17k.
- Leaner open-issue backlog (14).