Customer IO vs Mattermost

Customer IO and Mattermost (Mattermost is a secure collaboration platform for connecting your teams, tools and processes to accelerate mission-critical work.) both appear on the Smoower Developer Ecosystem Index.

Mattermost (rank #40) holds a modest lead over Customer IO (rank #165) on the overall Smoower ecosystem score (62 vs 51). The gap of 11 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Mattermost is clearly ahead of Customer IO. On education (docs, guides and learning material for developers), Customer IO is ahead of Mattermost. On community (issue response, PR reviews and discussion health), Mattermost is ahead of Customer IO. On reach (how visible the ecosystem is beyond its own repos), Mattermost is clearly ahead of Customer IO. On momentum (release cadence and how fast the ecosystem moves), Mattermost is clearly 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. Mattermost shows 49,882 stars across 262 public repos, 58 active in the last 90 days and 105 external contributors. The star gap on its own does not decide the comparison, but Mattermost's footprint is roughly 72.9x 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. Mattermost 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.