Duolingo vs Factorial

Duolingo and Factorial (HR Software for small and medium companies) both appear on the Smoower Developer Ecosystem Index.

Factorial (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), Factorial is ahead of Duolingo. On education (docs, guides and learning material for developers), Factorial is ahead of Duolingo. On community (issue response, PR reviews and discussion health), Duolingo is slightly ahead of Factorial. On reach (how visible the ecosystem is beyond its own repos), Duolingo is clearly ahead of Factorial. On momentum (release cadence and how fast the ecosystem moves), Factorial is clearly 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. Factorial shows 117 stars across 70 public repos, 19 active in the last 90 days and 53 external contributors. The star gap on its own does not decide the comparison, but Duolingo's footprint is roughly 14.7x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Duolingo is the stronger read for anyone weighting reach. Factorial looks better where momentum 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.