Duolingo vs Klaviyo

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

Klaviyo (rank #237) holds a narrow lead over Duolingo (rank #338) on the overall Smoower ecosystem score (48 vs 43). The gap of 5 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 Duolingo. On education (docs, guides and learning material for developers), Klaviyo is ahead of Duolingo. On community (issue response, PR reviews and discussion health), Klaviyo is ahead of Duolingo. On reach (how visible the ecosystem is beyond its own repos), Duolingo is slightly ahead of Klaviyo. On momentum (release cadence and how fast the ecosystem moves), Duolingo is slightly ahead of Klaviyo.

Duolingo carries 1,721 GitHub stars across 12 public repos, with 8 repositories active in the last 90 days and 11 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 Duolingo's footprint is roughly 3.0x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Duolingo 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.