Close vs Customer IO

Close (The inside sales CRM of choice for SMBs) and Customer IO both appear on the Smoower Developer Ecosystem Index.

Customer IO (rank #165) holds a narrow lead over Close (rank #298) on the overall Smoower ecosystem score (51 vs 45). The gap of 6 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 Close. On education (docs, guides and learning material for developers), Customer IO is ahead of Close. On reach (how visible the ecosystem is beyond its own repos), Customer IO is clearly ahead of Close. On momentum (release cadence and how fast the ecosystem moves), Close is ahead of Customer IO.

Close carries 3,871 GitHub stars across 190 public repos, with 25 repositories active in the last 90 days and 10 external contributors on record. Customer IO shows 684 stars across 107 public repos, 42 active in the last 90 days and 26 external contributors. The star gap on its own does not decide the comparison, but Close's footprint is roughly 5.7x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Close is the stronger read for anyone weighting momentum. Customer IO looks better where reach 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.