Calendly vs KAYAK

Calendly (Simple, beautiful scheduling.) and KAYAK both appear on the Smoower Developer Ecosystem Index.

KAYAK (rank #485) holds a narrow lead over Calendly (rank #729) on the overall Smoower ecosystem score (38 vs 30). The gap of 8 points reflects composite signals across code, docs, community and reach.

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

Calendly carries 132 GitHub stars across 29 public repos, with 0 repositories active in the last 90 days and 0 external contributors on record. KAYAK shows 3,186 stars across 72 public repos, 4 active in the last 90 days and 1 external contributors. The star gap on its own does not decide the comparison, but KAYAK's footprint is roughly 24.1x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Calendly is the stronger read for anyone weighting reach. KAYAK 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.