Duolingo vs Yoast

Duolingo and Yoast (This is where the Yoast.com team shares its public code: from our WordPress plugins to other small projects.) both appear on the Smoower Developer Ecosystem Index.

Yoast (rank #209) holds a narrow lead over Duolingo (rank #338) on the overall Smoower ecosystem score (49 vs 43). The gap of 6 points reflects composite signals across code, docs, community and reach.

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

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. Yoast shows 3,439 stars across 78 public repos, 12 active in the last 90 days and 21 external contributors.

Duolingo is the stronger read for anyone weighting reach. Yoast 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.