Sanity

Sanity.io is the platform for structured content. It comes with an open-source editing environment called Sanity Studio that you can customize with JavaScript and a real-time hosted data store.

Sanity Studio is an open source headless real-time CMS, that you can customize with JavaScript and React.

Sanity is the first content platform to empower teams of all sizes with real-time collaboration, advanced version control and more.