Duolingo vs Semrush

Duolingo and Semrush (We do love open source and have an opportunity to make it better from now.) both appear on the Smoower Developer Ecosystem Index.

Semrush (rank #317) holds a narrow lead over Duolingo (rank #338) on the overall Smoower ecosystem score (44 vs 43). The gap of 1 points reflects composite signals across code, docs, community and reach.

On education (docs, guides and learning material for developers), Semrush is ahead of Duolingo. On community (issue response, PR reviews and discussion health), Duolingo is slightly ahead of Semrush. On reach (how visible the ecosystem is beyond its own repos), Duolingo is ahead of Semrush. On momentum (release cadence and how fast the ecosystem moves), Duolingo is slightly ahead of Semrush.

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. Semrush shows 454 stars across 11 public repos, 2 active in the last 90 days and 7 external contributors. The star gap on its own does not decide the comparison, but Duolingo's footprint is roughly 3.8x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Duolingo is the stronger read for anyone weighting reach. Semrush looks better where education 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.