Customer IO vs Gusto

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

Customer IO (rank #165) holds a narrow lead over Gusto (rank #338) on the overall Smoower ecosystem score (51 vs 43). The gap of 8 points reflects composite signals across code, docs, community and reach.

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

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. Gusto shows 781 stars across 148 public repos, 20 active in the last 90 days and 6 external contributors.

Customer IO is the stronger read for anyone weighting reach. Gusto 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.