Customer IO vs Fillout

Customer IO and Fillout both appear on the Smoower Developer Ecosystem Index.

Customer IO (rank #165) holds a modest lead over Fillout (rank #510) on the overall Smoower ecosystem score (51 vs 37). The gap of 14 points reflects composite signals across code, docs, community and reach.

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

Customer IO carries 684 GitHub stars across 107 public repos, with 42 repositories active in the last 90 days and 26 external contributors on record. Fillout shows 2 stars across 9 public repos, 3 active in the last 90 days and 3 external contributors. The star gap on its own does not decide the comparison, but Customer IO's footprint is roughly 342.0x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Customer IO is the stronger read for anyone weighting momentum. Fillout 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.