Duolingo vs Nulab Inc

Duolingo and Nulab Inc (We are a small company with a big heart and all of our products are handcrafted with love.) both appear on the Smoower Developer Ecosystem Index.

Duolingo (rank #338) holds a modest lead over Nulab Inc (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), Nulab Inc is ahead of Duolingo. On education (docs, guides and learning material for developers), Nulab Inc is clearly ahead of Duolingo. On community (issue response, PR reviews and discussion health), Duolingo is slightly ahead of Nulab Inc. On reach (how visible the ecosystem is beyond its own repos), Duolingo is clearly ahead of Nulab Inc. On momentum (release cadence and how fast the ecosystem moves), Duolingo is ahead of Nulab Inc.

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. Nulab Inc shows 1,860 stars across 87 public repos, 6 active in the last 90 days and 12 external contributors.

Duolingo is the stronger read for anyone weighting reach. Nulab Inc 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.