ExpressVPN vs KAYAK

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

KAYAK (rank #485) holds a narrow lead over ExpressVPN (rank #569) on the overall Smoower ecosystem score (38 vs 35). 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), KAYAK is slightly ahead of ExpressVPN. On education (docs, guides and learning material for developers), ExpressVPN is ahead of KAYAK. On reach (how visible the ecosystem is beyond its own repos), ExpressVPN is slightly ahead of KAYAK. On momentum (release cadence and how fast the ecosystem moves), KAYAK is clearly ahead of ExpressVPN.

ExpressVPN carries 1,250 GitHub stars across 12 public repos, with 3 repositories active in the last 90 days and 7 external contributors on record. KAYAK shows 3,186 stars across 72 public repos, 4 active in the last 90 days and 1 external contributors.

ExpressVPN is the stronger read for anyone weighting education. KAYAK 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.