Calendly vs Formbricks

Calendly (Simple, beautiful scheduling.) and Formbricks (Open Source Qualtrics Alternative) both appear on the Smoower Developer Ecosystem Index.

Formbricks (rank #237) holds a modest lead over Calendly (rank #729) on the overall Smoower ecosystem score (48 vs 30). The gap of 18 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Formbricks is clearly ahead of Calendly. On education (docs, guides and learning material for developers), Formbricks is ahead of Calendly. On community (issue response, PR reviews and discussion health), Formbricks is clearly ahead of Calendly. On reach (how visible the ecosystem is beyond its own repos), Calendly is ahead of Formbricks. On momentum (release cadence and how fast the ecosystem moves), Formbricks 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. Formbricks shows 12,727 stars across 18 public repos, 9 active in the last 90 days and 6 external contributors. The star gap on its own does not decide the comparison, but Formbricks's footprint is roughly 96.4x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Calendly is the stronger read for anyone weighting reach. Formbricks looks better where community 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.