Customer IO vs Revolut

Customer IO and Revolut (Revolut Open Source) both appear on the Smoower Developer Ecosystem Index.

Customer IO (rank #165) holds a modest lead over Revolut (rank #693) on the overall Smoower ecosystem score (51 vs 31). The gap of 20 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 Revolut. On education (docs, guides and learning material for developers), Customer IO is clearly ahead of Revolut. On community (issue response, PR reviews and discussion health), Customer IO is ahead of Revolut. On momentum (release cadence and how fast the ecosystem moves), Customer IO is clearly ahead of Revolut.

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. Revolut shows 260 stars across 35 public repos, 5 active in the last 90 days and 1 external contributors.

Customer IO is the stronger read for anyone weighting education. Revolut 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.