Mattermost vs Open edX

Mattermost (Mattermost is a secure collaboration platform for connecting your teams, tools and processes to accelerate mission-critical work.) and Open edX (The community-driven, open-source project powering edX.org and thousands of other online education sites around the world.) both appear on the Smoower Developer Ecosystem Index.

Mattermost (rank #40) holds a modest lead over Open edX (rank #372) on the overall Smoower ecosystem score (62 vs 42). 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), Mattermost is ahead of Open edX. On education (docs, guides and learning material for developers), Mattermost is clearly ahead of Open edX. On community (issue response, PR reviews and discussion health), Open edX is slightly ahead of Mattermost. On reach (how visible the ecosystem is beyond its own repos), Mattermost is clearly ahead of Open edX. On momentum (release cadence and how fast the ecosystem moves), Mattermost is ahead of Open edX.

Mattermost carries 49,882 GitHub stars across 262 public repos, with 58 repositories active in the last 90 days and 105 external contributors on record. Open edX shows 10,654 stars across 186 public repos, 100 active in the last 90 days and 91 external contributors. The star gap on its own does not decide the comparison, but Mattermost's footprint is roughly 4.7x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Mattermost is the stronger read for anyone weighting reach. Open edX looks better where community 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.