Contentful
Contentful is a content hub, pioneering the concept of headless content management. It's a powerful 100% SaaS solution for pure content management that I have recently become fairly familiar with.
While our foundation comes out of the Episerver Web Content Management world, we're increasingly fascinated by the simplicity of separating pure content management in a service such as Contentful for un-intrusive content use in multiple channels, while still keeping for example advanced web experience delivery in a system like Episerver.