Codecademy vs Duolingo

Codecademy (The easiest way to learn to code.) and Duolingo both appear on the Smoower Developer Ecosystem Index.

Duolingo (rank #338) holds a narrow lead over Codecademy (rank #510) on the overall Smoower ecosystem score (43 vs 37). 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), Duolingo is slightly ahead of Codecademy. On education (docs, guides and learning material for developers), Duolingo is slightly ahead of Codecademy. On community (issue response, PR reviews and discussion health), Duolingo is slightly ahead of Codecademy. On reach (how visible the ecosystem is beyond its own repos), Duolingo is slightly ahead of Codecademy. On momentum (release cadence and how fast the ecosystem moves), Duolingo is clearly ahead of Codecademy.

Codecademy carries 5,241 GitHub stars across 86 public repos, with 1 repositories active in the last 90 days and 5 external contributors on record. Duolingo shows 1,721 stars across 12 public repos, 8 active in the last 90 days and 11 external contributors. The star gap on its own does not decide the comparison, but Codecademy's footprint is roughly 3.0x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Codecademy is worth a look for teams already invested in its stack. Duolingo 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.