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CMS comparison Contentstack vs Instatic

Contentstack vs Instatic

Contentstack is a closed-source headless CMS that runs on the vendor's cloud. Instatic is an open-source site builder that you host yourself. The table below sets them side by side on 28 features. They get a different status on 16.

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  • Contentstack Headless · Closed source · 17 of 28 built in
  • Instatic Site builder · Open source · 15 of 28 built in

Sources checked: Contentstack on 29 Sept 2026, Instatic on 30 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
Contentstack vs Instatic feature comparison. Columns are the two platforms. Rows are features, grouped by area.
Platform
Contentstack Headless
Instatic Site builder
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, self-hosted CMS with a visual canvas editor. One Bun server runs the editor, content store and publisher, and publishing writes plain HTML files to disk.
Edition compared The product and release each column describes. Contentstack Content Cloud headless CMS, Free, Growth and Enterprise plans SaaS, continuously updated Instatic 0.0.20, open source Version 0.0.20, released 13 Sept 2026
Vendor Contentstack contentstack.com CoreBunch instatic.com
Licence Closed source Proprietary Open source MIT
Hosting No self-hosting Vendor cloud Self-hosting No vendor cloud No managed hosting. You deploy the Docker image to your own server, or use the Railway and Render templates.
Built with Hosted SaaS with REST and GraphQL APIs, CLI and SDKsTypeScript, Bun, React admin
Database Managed by ContentstackSQLite, PostgreSQL
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, with no paid tiers. 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 Not available Tables and fields live in the database and change in the Data workspace. Plugins can create tables through the SDK. 610
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 Custom post types and data tables in the Data workspace. 616
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 Visual Components with typed parameters and named slots, placed and reordered on the canvas. 72
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 Not available One site-wide language setting. No per-locale fields or entries. 21
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 Uploads get a set of WebP sizes, and the publisher writes srcset and sizes from the layout. 81
APIs and delivery
REST API A documented REST or JSON HTTP API returns content. Built in 5 Limited The JSON API under /admin/api/cms serves the admin behind a session cookie. No token-based content API outside MCP. 920
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 Not available No built-in webhooks. A plugin with network access can call a URL from content hooks. 10
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 Publishing renders every page to static HTML on the server's disk. 11
Editorial workflow
Drafts Editors save changes as a draft and publish them later. The live version stays untouched until then. Built in Built in 51
Scheduled publishing An editor can set a future date and time for content to publish or unpublish. Built in 6 Built in Per page and per post-type entry. 5
Version history The CMS keeps earlier versions of an entry, and editors can compare or restore them. Built in Built in Published versions of pages and entries, restorable into the draft. Added in 0.0.20. 124
Preview Editors can see unpublished content rendered as it will appear on the site before publishing. Built in 12 Built in The canvas renders drafts in the site design. Branch preview links work without an account. 122
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 Editing happens on the rendered page canvas, with a live mode for the full-size page. 214
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 Limited Branch merge requests with a review page and comments. No configurable review stages. 12
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 Limited Publish ships all draft pages at once. Branches group edits across pages and entries, but entries still publish one by one. 125
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 Limited Live co-editing of pages, components and layouts in the Site editor. Content workspace entries save separately. 13144
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 Built in The Owner builds roles from a fixed list of capabilities. 1516
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 Capabilities apply per table type and edit category, not per field. 16
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 Not available Email and password with optional TOTP two-factor. 15
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 Built in Append-only log of logins, content changes, role edits and plugin actions. 17
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 One site per installation. 2
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, editor extensions, dashboard widgets and canvas modules. 10
Plugin marketplace The vendor runs an official directory or marketplace of installable extensions. Built in Contentstack Marketplace. 13 Not available Plugins install as uploaded zip packages. No official directory. 10
Form builder Editors can build and publish forms and collect submissions without code. Not available Built in Forms are built on the canvas and submissions land in a data table. 18
Site member accounts The platform handles sign-up and login for public site users or members, separate from editors. Not available Not available
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 Built in Built-in agent in the Site and Content workspaces, with your own Claude, OpenAI, OpenRouter or Ollama key. 19
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 at /_instatic/mcp, with OAuth or scoped personal access tokens. 20

Considering more platforms? Compare Contentstack and Instatic with the rest of your shortlist in the CMS comparison tool.

Where they differ

Contentstack and Instatic get a different status on 16 of the 28 features and the same status on 12. Contentstack has 17 built in on its baseline edition, Instatic has 15. 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). Instatic is open source (MIT).
Self-hosting
Contentstack cannot be self-hosted. Instatic can be self-hosted.
Vendor cloud
Contentstack has a vendor-run cloud. Instatic has no vendor-run cloud.

Built in on Contentstack, a different answer on Instatic 7

  • Localization Contentstack: Built in. Instatic: Not available.
  • REST API Contentstack: Built in. Instatic: Limited.
  • GraphQL API Contentstack: Built in. Instatic: Not available.
  • Webhooks Contentstack: Built in. Instatic: Not available.
  • Content releases Contentstack: Built in. Instatic: Limited.
  • Multiple sites Contentstack: Built in. Instatic: Not available.
  • Plugin marketplace Contentstack: Built in. Instatic: Not available.

Built in on Instatic, a different answer on Contentstack 5

  • Renders the website Contentstack: Not available. Instatic: Built in.
  • Custom roles Contentstack: Paid tier. Instatic: Built in.
  • Audit log Contentstack: Limited. Instatic: Built in.
  • Form builder Contentstack: Not available. Instatic: Built in.
  • AI writing assistant Contentstack: Plugin or add-on. Instatic: Built in.

Built in on neither, with different answers 4

  • Content model in code Contentstack: Limited. Instatic: Not available.
  • Approval workflows Contentstack: Paid tier. Instatic: Limited.
  • Field-level permissions Contentstack: Paid tier. Instatic: Not available.
  • Single sign-on Contentstack: Limited. Instatic: Not available.

More comparisons

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