KAYAK vs Proton Mail

KAYAK and Proton Mail both appear on the Smoower Developer Ecosystem Index.

Proton Mail (rank #401) holds a narrow lead over KAYAK (rank #485) on the overall Smoower ecosystem score (41 vs 38). The gap of 3 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Proton Mail is slightly ahead of KAYAK. On education (docs, guides and learning material for developers), KAYAK is ahead of Proton Mail. On community (issue response, PR reviews and discussion health), Proton Mail is ahead of KAYAK. On momentum (release cadence and how fast the ecosystem moves), Proton Mail is ahead of KAYAK.

KAYAK carries 3,186 GitHub stars across 72 public repos, with 4 repositories active in the last 90 days and 1 external contributors on record. Proton Mail shows 16,265 stars across 186 public repos, 19 active in the last 90 days and 20 external contributors. The star gap on its own does not decide the comparison, but Proton Mail's footprint is roughly 5.1x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

KAYAK is the stronger read for anyone weighting education. Proton Mail looks better where community 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.