diff --git a/docs/channels/mattermost.md b/docs/channels/mattermost.md
index a528befb9..de4771745 100644
--- a/docs/channels/mattermost.md
+++ b/docs/channels/mattermost.md
@@ -8,6 +8,8 @@ read_when:
 # Mattermost (plugin)
 
 Status: supported via plugin (bot token + WebSocket events). Channels, groups, and DMs are supported.
+Mattermost is a self-hostable team messaging platform; see the official site at
+[mattermost.com](https://mattermost.com) for product details and downloads.
 
 ## Plugin required
 Mattermost ships as a plugin and is not bundled with the core install.