KAYAK vs PostHog

KAYAK and PostHog (The single platform to analyze, test, observe, and deploy new features) both appear on the Smoower Developer Ecosystem Index.

PostHog (rank #30) holds a meaningful lead over KAYAK (rank #485) on the overall Smoower ecosystem score (63 vs 38). The gap of 25 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), PostHog is ahead of KAYAK. On education (docs, guides and learning material for developers), KAYAK is slightly ahead of PostHog. On community (issue response, PR reviews and discussion health), PostHog is clearly ahead of KAYAK. On reach (how visible the ecosystem is beyond its own repos), KAYAK is ahead of PostHog. On momentum (release cadence and how fast the ecosystem moves), PostHog is clearly 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. PostHog shows 40,775 stars across 357 public repos, 87 active in the last 90 days and 212 external contributors. The star gap on its own does not decide the comparison, but PostHog's footprint is roughly 12.8x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

KAYAK is the stronger read for anyone weighting reach. PostHog 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.