diff --git a/content/about.md b/content/about.md
index 3e1eaa5..7a5e7b9 100644
--- a/content/about.md
+++ b/content/about.md
@@ -48,6 +48,9 @@ I host some online services that you're welcome to use free of charge.
   ([onion service](http://gbat2pbpg7ys3fi3pbp64667tt5x66mg45xok35bxdw7v55brm7a27yd.onion)) -
   A metasearch engine that gets its results from other search engines
   while protecting your privacy
+* [An SMP server](smp://PUDVvQiNbsYG6gXYC2-GYUIQnNICi3BoxKGDKWX55uM=@smp01.simplex.sapti.me) -
+  A server used by [SimpleX Chat](https://simplex.chat) to relay
+  messages between users
 
 ## Want to know more?