Contentstack is a headless, API-first content management system: it stores and manages content but has no built-in front end, so developers pull that content into websites, apps, or any other channel through APIs.
What “headless” actually means
A traditional CMS like WordPress or Drupal bundles content storage with page templates and rendering. You write a page, the CMS decides how it looks, and a browser requests that finished page directly from the CMS.
A headless system separates those jobs. Contentstack holds the content as structured data – entries, fields, assets, references – and exposes it through REST and GraphQL APIs. A separate front end (a website built with a framework like Next.js, a mobile app, a smart display, whatever) fetches that data and decides how to present it. The same piece of content can feed a website, an app, and a kiosk without being rewritten for each.
This matters for anyone planning to move content into or out of Contentstack: there’s no single “page” to export. Content lives as content types and entries, and any migration has to map those structures to whatever the source or target system uses, rather than copying HTML pages wholesale.
Headless vs traditional CMS
| Traditional CMS | Headless CMS (Contentstack) |
| Content and presentation are coupled | Content is separate from presentation |
| Renders finished HTML pages | Serves structured content via API |
| One front end, tightly integrated | Any number of front ends, built independently |
| Themes and templates live inside the CMS | Templates live in the app or site codebase |
| Content editors and developers often share the same tool | Editors work in the CMS UI, developers work in their own stack |
What Contentstack stores
- Content types: schemas that define fields for a kind of entry, similar to a post type
- Entries: the actual content records built from a content type
- Assets: images, documents, and other media
- References: links between entries, used to model relationships
- Environments and locales: for publishing the same content to different stages or languages
Moving content in or out
Because content is structured rather than rendered, moving it between Contentstack and another system means matching fields, not scraping pages. Typical friction points:
- A traditional CMS’s rich-text or block content has to be converted into Contentstack’s field types, and vice versa when moving out.
- Relationships between content (a post and its author, a product and its category) need to be rebuilt as references, since they rarely survive a flat export.
- Assets are usually a separate migration step from the entries that reference them, since URLs and IDs change.
- Multiple environments and locales mean deciding which one is the source of truth before copying anything.
If you’re comparing platforms before choosing where content should live next, the supported CMS list covers which systems are commonly involved in this kind of move.
Where it tends to fit
- Organisations publishing the same content across a website, app, and other channels from one source
- Teams that want content editors and developers working independently, on separate release cycles
- Projects built on modern front-end frameworks rather than server-rendered CMS themes
- Cases where content needs to reach devices with no browser at all – kiosks, voice assistants, IoT displays
It fits less well where a single small website is the only channel and a simpler, all-in-one CMS would mean less setup and fewer moving parts.