Open WebUI vs Runway

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

Open WebUI (rank #189) holds a narrow lead over Runway (rank #317) on the overall Smoower ecosystem score (50 vs 44). The gap of 6 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 Runway. On education (docs, guides and learning material for developers), Open WebUI is ahead of Runway. On community (issue response, PR reviews and discussion health), Open WebUI is clearly ahead of Runway. On reach (how visible the ecosystem is beyond its own repos), Runway is ahead of Open WebUI. On momentum (release cadence and how fast the ecosystem moves), Open WebUI is slightly ahead of Runway.

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. Runway shows 2,435 stars across 61 public repos, 16 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 65.6x 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. Runway looks better where reach 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.