Buffer vs Calendly

Buffer (Helping people build their business on social media since 2011) and Calendly (Simple, beautiful scheduling.) both appear on the Smoower Developer Ecosystem Index.

Buffer (rank #459) holds a modest lead over Calendly (rank #729) on the overall Smoower ecosystem score (39 vs 30). The gap of 9 points reflects composite signals across code, docs, community and reach.

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

Buffer carries 11,181 GitHub stars across 196 public repos, with 4 repositories active in the last 90 days and 0 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 Buffer's footprint is roughly 84.7x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Buffer is the stronger read for anyone weighting community. 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.