Which architecture model of SwaggerHub supports SSO? SaaS cloud ? On-premise? or both?

The SwaggerHub document said that only on-premise deployment model can support SSO. see: app.swaggerhub.com/help/enterprise/user-management/sso/overview. However, I've been heard in this community forum that SaaS model also support SSO. Is that true? Can you provide a link on SwaggerHub documentation how I can configure SaaS version for SSO?  As far as I understand, SaaS can't support SSO. 

Thank you for your clarification. 

Nad