* Is this node-only, then?
* If it is open-source, what's the pricing model?
One suggestion is that you could probably capture a lot of search traffic from devs just starting on SSO by providing great content on the topic. When I started looking, it was pretty tough to find the "for-dummies" content.
That is a great suggestion. SSO starter content is in the works including product integration guides.
It is a nodejs service (or can be embedded as an npm). We are looking at potentially supporting other languages but for now our customers are happy deploying it as a separate service.
The core version is completely free to use (Apache 2.0), we already have paying self-hosted customers who are paying a monthly subscription fee. We'll be introducing a paid hosted version later and premium features for the self-hosted version.