Customer IO vs HubSpot

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

HubSpot (rank #93) holds a narrow lead over Customer IO (rank #165) on the overall Smoower ecosystem score (56 vs 51). The gap of 5 points reflects composite signals across code, docs, community and reach.

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

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. HubSpot shows 53,481 stars across 381 public repos, 35 active in the last 90 days and 4 external contributors. The star gap on its own does not decide the comparison, but HubSpot's footprint is roughly 78.2x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

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