Adyen vs KAYAK

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

Adyen (rank #165) holds a modest lead over KAYAK (rank #485) on the overall Smoower ecosystem score (51 vs 38). The gap of 13 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 KAYAK. On education (docs, guides and learning material for developers), KAYAK is ahead of Adyen. On community (issue response, PR reviews and discussion health), Adyen is ahead of KAYAK. On reach (how visible the ecosystem is beyond its own repos), KAYAK is clearly ahead of Adyen. On momentum (release cadence and how fast the ecosystem moves), Adyen is ahead of KAYAK.

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. KAYAK shows 3,186 stars across 72 public repos, 4 active in the last 90 days and 1 external contributors.

Adyen is the stronger read for anyone weighting code quality. KAYAK 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.