Duolingo vs Grammarly

Duolingo and Grammarly (Millions of users rely on Grammarly's AI-powered products to make their messages, documents, and social media posts clear, mistake-free, and impactful.) both appear on the Smoower Developer Ecosystem Index.

Duolingo (rank #338) holds a modest lead over Grammarly (rank #602) on the overall Smoower ecosystem score (43 vs 34). The gap of 9 points reflects composite signals across code, docs, community and reach.

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

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. Grammarly shows 4,355 stars across 23 public repos, 0 active in the last 90 days and 0 external contributors.

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