Fillout vs Klaviyo

Fillout and Klaviyo both appear on the Smoower Developer Ecosystem Index.

Klaviyo (rank #237) holds a modest lead over Fillout (rank #510) on the overall Smoower ecosystem score (48 vs 37). The gap of 11 points reflects composite signals across code, docs, community and reach.

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

Fillout carries 2 GitHub stars across 9 public repos, with 3 repositories active in the last 90 days and 3 external contributors on record. Klaviyo shows 573 stars across 117 public repos, 23 active in the last 90 days and 17 external contributors. The star gap on its own does not decide the comparison, but Klaviyo's footprint is roughly 286.5x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Fillout is the stronger read for anyone weighting reach. Klaviyo 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.