Customer IO vs Yoast

Customer IO and Yoast (This is where the Yoast.com team shares its public code: from our WordPress plugins to other small projects.) both appear on the Smoower Developer Ecosystem Index.

Customer IO (rank #165) holds a narrow lead over Yoast (rank #209) on the overall Smoower ecosystem score (51 vs 49). The gap of 2 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Yoast is ahead of Customer IO. On education (docs, guides and learning material for developers), Customer IO is ahead of Yoast. On community (issue response, PR reviews and discussion health), Yoast is slightly ahead of Customer IO. On reach (how visible the ecosystem is beyond its own repos), Customer IO is clearly ahead of Yoast. On momentum (release cadence and how fast the ecosystem moves), Yoast is slightly ahead of Customer IO.

Customer IO carries 684 GitHub stars across 107 public repos, with 42 repositories active in the last 90 days and 26 external contributors on record. Yoast shows 3,439 stars across 78 public repos, 12 active in the last 90 days and 21 external contributors. The star gap on its own does not decide the comparison, but Yoast's footprint is roughly 5.0x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Customer IO is the stronger read for anyone weighting reach. Yoast looks better where code quality 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.