Customer IO vs Deezer

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

Customer IO (rank #165) holds a modest lead over Deezer (rank #536) on the overall Smoower ecosystem score (51 vs 36). The gap of 15 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 Deezer. On education (docs, guides and learning material for developers), Customer IO is slightly ahead of Deezer. On community (issue response, PR reviews and discussion health), Deezer is clearly ahead of Customer IO. On reach (how visible the ecosystem is beyond its own repos), Customer IO is clearly ahead of Deezer. On momentum (release cadence and how fast the ecosystem moves), Customer IO is clearly ahead of Deezer.

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. Deezer shows 29,854 stars across 99 public repos, 5 active in the last 90 days and 2 external contributors. The star gap on its own does not decide the comparison, but Deezer's footprint is roughly 43.6x 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. Deezer looks better where community 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.