Duolingo vs Pleo

Duolingo and Pleo both appear on the Smoower Developer Ecosystem Index.

Duolingo (rank #338) holds a modest lead over Pleo (rank #625) on the overall Smoower ecosystem score (43 vs 33). The gap of 10 points reflects composite signals across code, docs, community and reach.

On education (docs, guides and learning material for developers), Pleo is ahead of Duolingo. On community (issue response, PR reviews and discussion health), Duolingo is ahead of Pleo. On reach (how visible the ecosystem is beyond its own repos), Duolingo is clearly ahead of Pleo. On momentum (release cadence and how fast the ecosystem moves), Pleo 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. Pleo shows 36 stars across 34 public repos, 5 active in the last 90 days and 8 external contributors. The star gap on its own does not decide the comparison, but Duolingo's footprint is roughly 47.8x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

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