Amplitude vs Calendly

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

Amplitude (rank #93) holds a meaningful lead over Calendly (rank #729) on the overall Smoower ecosystem score (56 vs 30). The gap of 26 points reflects composite signals across code, docs, community and reach.

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

Amplitude carries 3,154 GitHub stars across 151 public repos, with 39 repositories active in the last 90 days and 20 external contributors on record. Calendly shows 132 stars across 29 public repos, 0 active in the last 90 days and 0 external contributors. The star gap on its own does not decide the comparison, but Amplitude's footprint is roughly 23.9x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Amplitude is the stronger read for anyone weighting momentum. Calendly 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.