GraphCMS enables developers to build powerful content APIs in a matter of minutes, while it gives content editors all the tools they need to manage their content. The hosted content APIs can then be easily consumed by websites, apps or any other platform or partner. The founders describe their product as content microservice, as it fits in any tool chain dealing with content.
Sanity 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.
Zesty.io is a cloud platform for brand marketing teams to build content-rich websites that engage customers and accelerate sales. Successfully deployed by global customers like Sony Electronics, Astroglide, and Rocket League, the Zesty.io SaaS platform is a low-risk opportunity for mid-market and enterprise brands to speed, scale and secure global distribution, customer engagement, and website management of digital content.