add Stackspin Comparison

docs/intro/comparisons.md

@@ -119,3 +119,22 @@ Here is a short overview of the pros/cons we see, in relation to our goals and n
 - 👎 Array of sysadmin skills required to install and maintain apps.
 - 👎 Hard to share configurations into the commons.
 - 👎 No idea who has done what change when.
+
+
+### Stackspin
+
+#### Pros
+
+- 👍 Easy instructions to install & upgrade multiple tightly integrated apps.
+- 👍 Offers a unified SSO user experience.
+- 👍 Offers tightly integrated logging, monitoring, and maintenance.
+- 👍 Has a strong focus and attention to security.
+
+#### 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.
+- 👎 Significantly limited library of eight apps.
+- 👎 Additional apps are treated as "External Apps" with only OAuth2/OpenID integration.
+- 👎 Requires a Kubernetes cluster.