Customer IO vs Userlike

Customer IO and Userlike both appear on the Smoower Developer Ecosystem Index.

Customer IO (rank #165) holds a modest lead over Userlike (rank #569) on the overall Smoower ecosystem score (51 vs 35). The gap of 16 points reflects composite signals across code, docs, community and reach.

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

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. Userlike shows 38 stars across 14 public repos, 3 active in the last 90 days and 3 external contributors. The star gap on its own does not decide the comparison, but Customer IO's footprint is roughly 18.0x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Customer IO is the stronger read for anyone weighting momentum. Userlike 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.