compare
pgvectorscale vs Weaviate
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | pgvectorscale | Weaviate |
|---|---|---|
| Language | Rust | Go |
| Licence | PostgreSQL | Other |
| Stars | 3.1k | 17k |
| Latest | 0.9.1 | v1.39.9 |
| Last push | 2026-10-01 | 2026-10-06 |
| Release cadence | about 98 days between releases | about 1 day between releases |
| Active contributors | 2 commit authors on the default branch in the last 90 days | 15+ commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Pinecone. Alternatives to Pinecone →
PartialpgvectorscaleAdds a disk-based StreamingDiskANN index and label filtering to pgvector inside PostgreSQL.
Full replacementWeaviateVector and hybrid search with built-in vectoriser modules.
pgvectorscale
- 0.9.12026-09-04This release hardens DiskANN against type confusion and malformed vector datums. Previously, the operator-class SQL ref…
- 0.9.02025-11-04Added support for PG18
- 0.8.02025-07-02v0.8.0
- 0.7.12025-04-22Fixes for poor recall with label filters
- 0.7.02025-03-21Support for Filtered DiskANN, as described in the updated README.md! (Blog post to come.)
Weaviate
- v1.38.192026-10-06v1.38.19 - Export data to Parquet format improvements
- v1.39.92026-10-05v1.39.9 - LSM store performance improvements
- v1.39.82026-10-01v1.39.8 - MMR normalize query vector Fix, Multi-tenant collections re-vectorize check on PATCH
- v1.38.182026-10-01v1.38.18 - MMR normalize query vector Fix, Multi-tenant collections re-vectorize check on PATCH Fix
- v1.40.0-rc.22026-09-30v1.40.0-rc.2 - Alter Schema Drop Vector Index, HFresh MUVERA, RQ-4 quantizationpre-release
pgvectorscale
unsigned The latest release, 0.9.1, carries no signature GitHub could verify.
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Weaviate
unsigned The latest release, v1.39.9, carries no signature GitHub could verify.
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