15Five vs Formbricks

15Five and Formbricks (Open Source Qualtrics Alternative) both appear on the Smoower Developer Ecosystem Index.

Formbricks (rank #237) holds a modest lead over 15Five (rank #693) on the overall Smoower ecosystem score (48 vs 31). The gap of 17 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Formbricks is ahead of 15Five. On education (docs, guides and learning material for developers), Formbricks is ahead of 15Five. On community (issue response, PR reviews and discussion health), Formbricks is ahead of 15Five. On reach (how visible the ecosystem is beyond its own repos), Formbricks is clearly ahead of 15Five. On momentum (release cadence and how fast the ecosystem moves), 15Five is ahead of Formbricks.

15Five carries 141 GitHub stars across 29 public repos, with 2 repositories active in the last 90 days and 5 external contributors on record. Formbricks shows 12,675 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 89.9x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

15Five is the stronger read for anyone weighting momentum. Formbricks 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.