Open WebUI vs Weaviate

Open WebUI (On a mission to build the best AI user interface.) and Weaviate (Weaviate creates database software like the Weaviate vector search engine) both appear on the Smoower Developer Ecosystem Index.

Weaviate (rank #152) holds a narrow lead over Open WebUI (rank #189) on the overall Smoower ecosystem score (52 vs 50). The gap of 2 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Open WebUI is slightly ahead of Weaviate. On education (docs, guides and learning material for developers), Open WebUI is slightly ahead of Weaviate. On community (issue response, PR reviews and discussion health), Open WebUI is ahead of Weaviate. On reach (how visible the ecosystem is beyond its own repos), Weaviate is slightly ahead of Open WebUI. On momentum (release cadence and how fast the ecosystem moves), Weaviate is clearly ahead of Open WebUI.

Open WebUI carries 159,650 GitHub stars across 25 public repos, with 12 repositories active in the last 90 days and 198 external contributors on record. Weaviate shows 30,251 stars across 140 public repos, 32 active in the last 90 days and 51 external contributors. The star gap on its own does not decide the comparison, but Open WebUI's footprint is roughly 5.3x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Open WebUI is the stronger read for anyone weighting community. Weaviate looks better where momentum is the deciding factor. The table below breaks the scores down pillar by pillar; the linked profiles cover the underlying repos, docs and community signals in full.