Klaviyo vs Sage

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

Klaviyo (rank #237) holds a modest lead over Sage (rank #625) on the overall Smoower ecosystem score (48 vs 33). The gap of 15 points reflects composite signals across code, docs, community and reach.

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

Klaviyo carries 573 GitHub stars across 117 public repos, with 23 repositories active in the last 90 days and 17 external contributors on record. Sage shows 2,180 stars across 122 public repos, 6 active in the last 90 days and 22 external contributors. The star gap on its own does not decide the comparison, but Sage's footprint is roughly 3.8x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Klaviyo is the stronger read for anyone weighting momentum. Sage looks better where code quality 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.