Calendly vs Zeplin

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

Zeplin (rank #432) holds a modest lead over Calendly (rank #729) on the overall Smoower ecosystem score (40 vs 30). The gap of 10 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Zeplin is ahead of Calendly. On education (docs, guides and learning material for developers), Zeplin is clearly ahead of Calendly. On community (issue response, PR reviews and discussion health), Zeplin is ahead of Calendly. On reach (how visible the ecosystem is beyond its own repos), Calendly is clearly ahead of Zeplin. On momentum (release cadence and how fast the ecosystem moves), Zeplin is 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. Zeplin shows 1,463 stars across 57 public repos, 7 active in the last 90 days and 4 external contributors. The star gap on its own does not decide the comparison, but Zeplin's footprint is roughly 11.1x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

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