Contentful - You don't need another CMS. You need a better way to manage content — unified, structured, and ready to deploy to any digital channel.
Cockpit CMS - Add content management functionality to any site - plug & play CMS
Strapi - Strapi is the most advanced Node.
Butter CMS - API-first CMS + blog platform built for developers & marketers.
Prismic - prismic.io is a web software you can use to manage content in any kind of website or app. API-driven.
GraphCMS - The GraphQL Headless CMS