Chroma vs Open WebUI

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

Open WebUI (rank #189) holds a narrow lead over Chroma (rank #209) on the overall Smoower ecosystem score (50 vs 49). The gap of 1 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 Chroma. On education (docs, guides and learning material for developers), Open WebUI is slightly ahead of Chroma. On community (issue response, PR reviews and discussion health), Open WebUI is ahead of Chroma. On reach (how visible the ecosystem is beyond its own repos), Chroma is slightly ahead of Open WebUI. On momentum (release cadence and how fast the ecosystem moves), Open WebUI is clearly ahead of Chroma.

Chroma carries 30,602 GitHub stars across 29 public repos, with 6 repositories active in the last 90 days and 94 external contributors on record. Open WebUI shows 159,650 stars across 25 public repos, 12 active in the last 90 days and 198 external contributors. The star gap on its own does not decide the comparison, but Open WebUI's footprint is roughly 5.2x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Chroma is the stronger read for anyone weighting reach. Open WebUI 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.