Open WebUI vs Ultimate.

Open WebUI (On a mission to build the best AI user interface.) and Ultimate. both appear on the Smoower Developer Ecosystem Index.

Open WebUI (rank #189) holds a meaningful lead over Ultimate. (rank #996) on the overall Smoower ecosystem score (50 vs 19). The gap of 31 points reflects composite signals across code, docs, community and reach.

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

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. Ultimate. shows 4 stars across 25 public repos, 0 active in the last 90 days and 0 external contributors. The star gap on its own does not decide the comparison, but Open WebUI's footprint is roughly 39912.5x 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. Ultimate. makes more sense for teams already using its adjacent tools. The table below breaks the scores down pillar by pillar; the linked profiles cover the underlying repos, docs and community signals in full.