Contentstack vs EmDash
Contentstack is a closed-source headless CMS that runs on the vendor's cloud. EmDash is an open-source traditional CMS that you host yourself. The table below sets them side by side on 28 features. They get a different status on 13.
- Contentstack Headless · Closed source · 17 of 28 built in
- EmDash Traditional · Open source · 14 of 28 built in
Sources checked: Contentstack on 29 Sept 2026, EmDash on 29 Sept 2026. Plans and releases can change after those dates.
WAYF is an official Payload partner and top contributor. Every platform in the table is classified by the same published definitions, and each answer lists the vendor page it came from.
Feature comparison
Built inPaid tierPlugin or add-onLimitedNot available
| Platform |  | |
|---|---|---|
| Overview | ||
| What it is | Hosted headless CMS run by Contentstack, sold alongside its AI agent and customer data products. It delivers content over REST and GraphQL APIs. | Open-source CMS from Cloudflare that runs inside an Astro site, with the admin and pages in one app on Cloudflare Workers or Node.js. |
| Edition compared The product and release each column describes. | Contentstack Content Cloud headless CMS, Free, Growth and Enterprise plans SaaS, continuously updated | EmDash 1.0, open source Version 1.0.1, released 28 Sept 2026 |
| Vendor | Contentstack contentstack.com | Cloudflare emdashcms.com |
| Licence | Closed source Proprietary | Open source MIT |
| Hosting | No self-hosting Vendor cloud | Self-hosting No vendor cloud No managed hosting. You deploy to your own Cloudflare account or Node.js server. |
| Built with | Hosted SaaS with REST and GraphQL APIs, CLI and SDKs | TypeScript, Astro |
| Database | Managed by Contentstack | SQLite, Cloudflare D1, PostgreSQL, libSQL |
| Pricing Public list prices only. Hosting and implementation are extra everywhere. | Free to start Free plan. Growth $299 per month, extra users $25 per user per month. Enterprise on request. | Free to start Free and open source. You pay only for hosting. |
| Content modelling | ||
| Content model in code You define content types in files in your repository, review them like any other code and apply them from there. Imperative migration scripts alone count as limited. | Limited Migration scripts run by the Contentstack CLI. No declarative schema files. 2 | Limited Seed files set up new sites. A live site's model changes through the admin, API or CLI. 20 |
| Content model in the UI Admins can create and change content types and fields in the admin interface without writing code. | Built in 1 | Built in Admin role only. 220 |
| Reusable blocks Editors compose pages from reusable, typed components or blocks, and can reorder them. | Built in Modular Blocks fields, plus the Visual Editor for page layout. 12 | Built in Blocks field with versioned block types. 5 |
| Localization Editors translate content per locale inside the CMS, by field or by entry, without a separate site for each language. | Built in Entry-level localization in over 200 languages. 15 | Built in Each translation is a separate entry with its own status. 6 |
| Image transformations The CMS resizes, crops or converts images on request, through URL parameters or generated sizes, with no external service. | Built in Image Delivery API resizes, crops and converts by URL parameter. 3 | Built in Uses Astro's image endpoint for sizes and formats. Crop and focal point in the editor. 78 |
| APIs and delivery | ||
| REST API A documented REST or JSON HTTP API returns content. | Built in 5 | Built in 9 |
| GraphQL API The vendor or an official module provides a GraphQL API for content. | Built in 4 | Not available |
| Webhooks The CMS can call an external URL when content is created, changed or published. | Built in | Plugin or add-on Official webhook-notifier plugin. 18 |
| Renders the website The CMS itself renders and serves the public pages through themes or templates. Headless-only products answer no. | Not available | Built in The Astro site renders the pages. 2 |
| Editorial workflow | ||
| Drafts Editors save changes as a draft and publish them later. The live version stays untouched until then. | Built in | Built in 10 |
| Scheduled publishing An editor can set a future date and time for content to publish or unpublish. | Built in 6 | Built in 10 |
| Version history The CMS keeps earlier versions of an entry, and editors can compare or restore them. | Built in | Built in On revision-enabled collections. 10 |
| Preview Editors can see unpublished content rendered as it will appear on the site before publishing. | Built in 12 | Built in Signed preview links. 11 |
| Visual editing Editors can click on the rendered page and edit content in place or in a side panel next to it. | Built in Visual Editor on every plan. 112 | Built in Signed-in editors get visual editing on the rendered page. 11 |
| Approval workflows Content moves through review stages you configure, such as draft, review and approved, with permissions per stage. | Paid tier Custom workflows on Growth and Enterprise. 17 | Not available Contributors cannot publish. No configurable review stages. 1210 |
| Content releases Editors group changes across several entries and publish them together as one release. | Built in Releases deploy grouped entries and assets to an environment. 6 | Not available |
| Real-time co-editing Two or more editors can work on the same entry at once and see each other's changes live. | Limited Field-level locks and presence. Rolling out in phases with Drafts and Auto Save. 8 | Not available |
| Access and governance | ||
| Custom roles Admins define their own roles with granular permissions instead of picking from a fixed set. | Paid tier 2 custom roles on Growth, 500 on Enterprise. None on Free. 1 | Not available Five fixed roles from Subscriber to Admin. 12 |
| Field-level permissions Admins can restrict access to single fields, on top of content types and entries. | Paid tier Field rules inside custom roles, from Growth. 19 | Not available 12 |
| Single sign-on Editors can sign in through SAML or OpenID Connect against a company identity provider. | Limited SAML 2.0 documented; baseline availability unconfirmed. Eligible tiers are not public. Confirm access in the contract. 10 | Limited Microsoft Entra sign-in built in. Other IdPs through Cloudflare Access. No native SAML. 12 |
| Audit log The CMS logs who changed what and when across the whole installation, and admins can review the log. | Limited Stack and organization logs documented; baseline availability unconfirmed. Confirm access and retention in the contract. 11 | Plugin or add-on Official audit-log plugin. 19 |
| Platform and extensibility | ||
| Multiple sites One installation or account can manage several separate websites or brands with shared users. | Built in Separate stacks in one organization. Scaling stacks is a Growth and Enterprise option. 1 | Not available |
| Extensible admin UI Developers can add their own components, views or fields to the editing interface. | Built in Developer Hub apps in field, sidebar and dashboard UI locations. 13 | Built in Plugins add admin pages and dashboard widgets. 13 |
| Plugin marketplace The vendor runs an official directory or marketplace of installable extensions. | Built in Contentstack Marketplace. 13 | Built in Plugin registry, launched with 1.0. 143 |
| Form builder Editors can build and publish forms and collect submissions without code. | Not available | Plugin or add-on Official forms plugin. 17 |
| Site member accounts The platform handles sign-up and login for public site users or members, separate from editors. | Not available | Limited Subscriber role reads member-only content. Members share the editors' user system. 12 |
| AI writing assistant A first-party AI feature in the editing interface generates, rewrites or translates content. | Plugin or add-on Official AI Assistant app with Contentstack-managed or your own model keys. 113 | Not available |
| Official MCP server The vendor publishes a Model Context Protocol server so AI agents can read or write content. | Built in Official server run locally with npx @contentstack/mcp. 14 | Built in Built in and on by default. 15 |
Contentstack sources
Checked 29 Sept 2026. Contentstack Content Cloud headless CMS, Free, Growth and Enterprise plans.
- Contentstack pricing
- Contentstack docs: Migrate content using the CLI migration command
- Contentstack docs: Image Delivery API
- Contentstack docs: GraphQL Content Delivery API
- Contentstack docs: Content Delivery API
- Contentstack docs: About Releases
- Contentstack docs: About Workflows
- Contentstack docs: Real-Time Collaboration in the Entry Editor
- Contentstack docs: Examples to create custom roles
- Contentstack docs: About Single Sign-On (SSO)
- Contentstack docs: Monitor stack activities in Audit Log
- Contentstack docs: About Visual Editor
- Contentstack docs: AI Assistant app
- Contentstack docs: Contentstack MCP Server
- Contentstack docs: About Languages
EmDash sources
Checked 29 Sept 2026. EmDash 1.0, open source.
- emdash on the npm registry
- EmDash homepage
- EmDash 1.0: an open source CMS for Astro
- EmDash repository on GitHub
- EmDash docs: Blocks
- EmDash docs: Internationalization
- EmDash docs: Configuration reference
- EmDash docs: Media Library
- EmDash docs: REST API
- EmDash docs: Content lifecycle
- EmDash docs: Preview mode
- EmDash docs: Authentication
- EmDash docs: Plugins overview
- EmDash docs: Plugin registry
- EmDash docs: AI tools and MCP server
- EmDash docs: Database options
- @emdash-cms/plugin-forms on the npm registry
- @emdash-cms/plugin-webhook-notifier on the npm registry
- @emdash-cms/plugin-audit-log on the npm registry
- EmDash docs: Evolving a deployed site
Considering more platforms? Compare Contentstack and EmDash with the rest of your shortlist in the CMS comparison tool.
Where they differ
Contentstack and EmDash get a different status on 13 of the 28 features and the same status on 15. Contentstack has 17 built in on its baseline edition, EmDash has 14. Two matching statuses can still name different paid tiers or limits, so read the notes in the table before treating a row as equal.
- Licence
- Contentstack is closed source (Proprietary). EmDash is open source (MIT).
- Self-hosting
- Contentstack cannot be self-hosted. EmDash can be self-hosted.
- Vendor cloud
- Contentstack has a vendor-run cloud. EmDash has no vendor-run cloud.
Built in on Contentstack, a different answer on EmDash 4
- GraphQL API Contentstack: Built in. EmDash: Not available.
- Webhooks Contentstack: Built in. EmDash: Plugin or add-on.
- Content releases Contentstack: Built in. EmDash: Not available.
- Multiple sites Contentstack: Built in. EmDash: Not available.
Built in on EmDash, a different answer on Contentstack 1
- Renders the website Contentstack: Not available. EmDash: Built in.
Built in on neither, with different answers 8
- Approval workflows Contentstack: Paid tier. EmDash: Not available.
- Real-time co-editing Contentstack: Limited. EmDash: Not available.
- Custom roles Contentstack: Paid tier. EmDash: Not available.
- Field-level permissions Contentstack: Paid tier. EmDash: Not available.
- Audit log Contentstack: Limited. EmDash: Plugin or add-on.
- Form builder Contentstack: Not available. EmDash: Plugin or add-on.
- Site member accounts Contentstack: Not available. EmDash: Limited.
- AI writing assistant Contentstack: Plugin or add-on. EmDash: Not available.
More comparisons
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EmDash against other platforms
- Adobe Experience Manager vs EmDash
- Contentful vs EmDash
- CoreMedia Content Cloud vs EmDash
- Craft CMS vs EmDash
- DatoCMS vs EmDash
- Decap CMS vs EmDash
- Directus vs EmDash
- Drupal vs EmDash
- EmDash vs FirstSpirit
- EmDash vs Framer
- EmDash vs Ghost
- EmDash vs HubSpot CMS
- EmDash vs Hygraph
- EmDash vs Instatic
- EmDash vs Joomla
- EmDash vs Keystone
- EmDash vs Kirby
- EmDash vs Liferay DXP
- EmDash vs Optimizely CMS
- EmDash vs Payload
- EmDash vs Prismic
- EmDash vs Progress Sitefinity
- EmDash vs Sanity
- EmDash vs Sitecore
- EmDash vs Squarespace
- EmDash vs Statamic
- EmDash vs Storyblok
- EmDash vs Strapi
- EmDash vs TYPO3
- EmDash vs Umbraco
- EmDash vs Wagtail
- EmDash vs Webflow
- EmDash vs Wix
- EmDash vs WordPress
- EmDash vs Xperience by Kentico
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