diff --git a/index.html b/index.html
index c4567b4..ec74f65 100644
--- a/index.html
+++ b/index.html
@@ -23,6 +23,11 @@ priority: 0.9
             <p>Rocket.Chat is an enterprise-grade real time chat application. Use this for communicating with other users, joining a few different communities, and getting support for NixNet services.</p> 
             <a href="https://chat.nixnet.xyz"><button class="button">Register!</button></a>
         </div>
+        <div class="card">
+            <h1><b>Mattermost</b></h1> 
+            <p>Mattermost is a FLOSS application for real-time chat. Use this for communicating with other users, joining a few different communities, and getting support for NixNet services.</p> 
+            <a href="https://nixnet.xyz/mattermost/"><button class="button">Chat!</button></a>
+        </div>
         <div class="card">
             <h1><b>Gitea</b></h1> 
             <p>Gitea is a simple, easy-to-use and yet full-featured, self-hosted code hosting solution. Users get an initial limit of 5 repos. Please be conscientious of storage use and don't upload large files.</p>