Adyen vs Klarna

Adyen and Klarna both appear on the Smoower Developer Ecosystem Index.

Adyen (rank #165) holds a narrow lead over Klarna (rank #257) on the overall Smoower ecosystem score (51 vs 47). The gap of 4 points reflects composite signals across code, docs, community and reach.

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

Adyen carries 2,684 GitHub stars across 65 public repos, with 49 repositories active in the last 90 days and 39 external contributors on record. Klarna shows 2,965 stars across 139 public repos, 8 active in the last 90 days and 2 external contributors.

Adyen is the stronger read for anyone weighting momentum. Klarna looks better where reach 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.