Excalidraw vs Mattermost

Excalidraw (Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.) 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 #38) holds a narrow lead over Excalidraw (rank #103) on the overall Smoower ecosystem score (62 vs 55). The gap of 7 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 Excalidraw. On education (docs, guides and learning material for developers), Excalidraw is slightly ahead of Mattermost. On community (issue response, PR reviews and discussion health), Excalidraw is slightly ahead of Mattermost. On reach (how visible the ecosystem is beyond its own repos), Mattermost is clearly ahead of Excalidraw. On momentum (release cadence and how fast the ecosystem moves), Mattermost is clearly ahead of Excalidraw.

Excalidraw carries 136,744 GitHub stars across 25 public repos, with 3 repositories active in the last 90 days and 215 external contributors on record. Mattermost shows 49,882 stars across 262 public repos, 58 active in the last 90 days and 105 external contributors.

Excalidraw is the stronger read for anyone weighting community. Mattermost looks better where momentum 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.