add Maadix to Comparisons page

docs/intro/comparisons.md

@@ -138,3 +138,21 @@ Here is a short overview of the pros/cons we see, in relation to our goals and n
 - 👎 Significantly limited library of eight apps.
 - 👎 Additional apps are treated as "External Apps" with only OAuth2/OpenID integration.
 - 👎 Requires a Kubernetes cluster.
+
+
+### Maadix
+
+#### Pros
+
+- 👍 Nice looking web interface for app, domain & user management.
+- 👍 Offers a paid hosting service to get up and running easily.
+
+#### Cons
+
+- 👎 Upstream libre software communities aren't involved in packaging.
+- 👎 It is not designed to be a general specification.
+- 👎 Hard to share configurations into the commons.
+- 👎 Limited library of apps.
+- 👎 Uses *OpenNebula*, *Ansible*, and *Puppet* as underlying technologies.
+- 👎 Appears to be only a team of two people.
+- 👎 Appears to be inactive on Mastodon and limited GitLab activity.