KAYAK vs sendinblue (now Brevo)

KAYAK and sendinblue (now Brevo) both appear on the Smoower Developer Ecosystem Index.

sendinblue (now Brevo) (rank #372) holds a narrow lead over KAYAK (rank #485) on the overall Smoower ecosystem score (42 vs 38). 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), KAYAK is ahead of sendinblue (now Brevo). On education (docs, guides and learning material for developers), sendinblue (now Brevo) is ahead of KAYAK. On community (issue response, PR reviews and discussion health), KAYAK is ahead of sendinblue (now Brevo). On reach (how visible the ecosystem is beyond its own repos), KAYAK is ahead of sendinblue (now Brevo). On momentum (release cadence and how fast the ecosystem moves), KAYAK is clearly ahead of sendinblue (now Brevo).

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. sendinblue (now Brevo) shows 653 stars across 37 public repos, 0 active in the last 90 days and 0 external contributors. The star gap on its own does not decide the comparison, but KAYAK's footprint is roughly 4.9x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

KAYAK is the stronger read for anyone weighting momentum. sendinblue (now Brevo) looks better where education 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.