Strictly speaking, it is possible to implement our Hosted Login SSO feature without SDK support. In practice, it’s going to be a challenge. This is actually one reason we open source all of our SDKs; any interested developer can fork them and add in the functionality they need.
On the other hand, if single sign-on and Hosted Login pages aren’t a hard requirement, you can simply use the SDK of your choice as-is for a complete user management system.
If you have any questions about working with our SDKs or your Stormpath integration, please send them to firstname.lastname@example.org. We’d love to know which SDK you want to support Hosted Login next!