Cosmic

Cosmic is a managed headless CMS for content teams running multiple sites, brands and locales from one platform, with scheduled publishing, role-based access, a global CDN and AI agents that write, translate and open GitHub pull requests.

Cosmic is a managed headless CMS aimed at content teams that run more than one site, brand or language. Content is modelled once, stored in a single platform and delivered through one edge-cached API to frameworks such as Next.js, Nuxt, Astro or mobile apps. Cosmic operates the infrastructure, so teams do not host or scale servers themselves, and an uptime SLA of 99.95% is listed for Enterprise plans. The product is built around separating editorial work from engineering work. Editors write, schedule and preview drafts on the real site, translate pages where the content already lives, and publish without filing a ticket. Roles limit editors to content and media, while content models, API keys and agents stay with the people who own them. Access control applies at Workspace, Project and Bucket level, with two-factor authentication, per-Bucket API keys and version history that records the author of each change. Multi-site setups are handled through Workspaces, which pool several brands under one team and one bill. Each brand gets its own bucket, and shared content models can be reused across properties instead of being rebuilt per site. Content can be imported from an existing CMS and exported again, which addresses lock-in concerns. The AI layer is a set of agents that take a goal and a cadence rather than a step list. They can draft, translate and publish content for each brand and locale, read figures from Cosmic Insights or third-party REST APIs, and work in a connected GitHub repository by opening pull requests with tests. Agents can be triggered on demand, on a schedule or inside a workflow, from Slack, WhatsApp or Telegram, with optional human review. Among alternatives, Cosmic sits between developer-first headless systems and enterprise suites. It suits marketing teams and agencies managing many properties who want a hosted API plus automation, and it is less suited to anyone who needs a self-hosted or visual page-builder CMS.