Customer IO vs Zeplin

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

Customer IO (rank #165) holds a modest lead over Zeplin (rank #430) on the overall Smoower ecosystem score (51 vs 40). The gap of 11 points reflects composite signals across code, docs, community and reach.

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

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. Zeplin shows 1,460 stars across 57 public repos, 8 active in the last 90 days and 4 external contributors.

Customer IO is the stronger read for anyone weighting momentum. Zeplin makes more sense for teams already using its adjacent tools. The table below breaks the scores down pillar by pillar; the linked profiles cover the underlying repos, docs and community signals in full.