KAYAK vs Semrush

KAYAK and Semrush (We do love open source and have an opportunity to make it better from now.) both appear on the Smoower Developer Ecosystem Index.

Semrush (rank #317) holds a narrow lead over KAYAK (rank #485) on the overall Smoower ecosystem score (44 vs 38). 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), KAYAK is ahead of Semrush. On education (docs, guides and learning material for developers), Semrush is slightly ahead of KAYAK. On community (issue response, PR reviews and discussion health), Semrush is slightly ahead of KAYAK. On reach (how visible the ecosystem is beyond its own repos), KAYAK is ahead of Semrush. On momentum (release cadence and how fast the ecosystem moves), Semrush is slightly ahead of KAYAK.

KAYAK carries 3,186 GitHub stars across 72 public repos, with 4 repositories active in the last 90 days and 1 external contributors on record. Semrush shows 454 stars across 11 public repos, 2 active in the last 90 days and 7 external contributors. The star gap on its own does not decide the comparison, but KAYAK's footprint is roughly 7.0x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

KAYAK is the stronger read for anyone weighting code quality. Semrush looks better where education 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.