CMS comparison Contentstack vs Optimizely CMS

Contentstack vs Optimizely CMS

Contentstack is a closed-source headless CMS that runs on the vendor's cloud. Optimizely CMS is a closed-source enterprise DXP that you can host yourself or run on the vendor's cloud. The table below sets them side by side on 28 features. They get a different status on 11.

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Contentstack Headless · Closed source · 17 of 28 built in
Optimizely CMS Enterprise DXP · Closed source · 22 of 28 built in

Sources checked: Contentstack on 29 Sept 2026, Optimizely CMS 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

Contentstack vs Optimizely CMS feature comparison. Columns are the two platforms. Rows are features, grouped by area.
Platform	Contentstack Headless	Optimizely CMS Enterprise DXP
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.	Optimizely's .NET CMS for rendered and headless sites, hosted on Optimizely's DXP cloud or self-hosted, with Optimizely Graph for delivery.
Edition compared The product and release each column describes.	Contentstack Content Cloud headless CMS, Free, Growth and Enterprise plans SaaS, continuously updated	Optimizely CMS 13 PaaS, the current flagship. CMS SaaS is a separate hosted variant. Version 13.1.3, released 9 Sept 2026
Vendor	Contentstack contentstack.com	Optimizely optimizely.com
Licence	Closed source Proprietary	Closed source Proprietary
Hosting	No self-hosting Vendor cloud	Self-hosting Vendor cloud Self-hosted installs lose Opti ID features such as Opal and the DAM.
Built with	Hosted SaaS with REST and GraphQL APIs, CLI and SDKs	.NET 10, ASP.NET Core
Database	Managed by Contentstack	SQL Server, Azure SQL on DXP
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.	No free option Pricing on request.
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	Built in Content types as C# classes. 3
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 Content types and properties in Settings. 4
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 in content areas and Visual Builder elements.
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 Language branches per content item. 5
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 DXP CDN resizes, crops and converts images by URL parameters. 6
APIs and delivery
REST API A documented REST or JSON HTTP API returns content.	Built in 5	Built in Content Delivery API 13 and a management REST API. 1 2
GraphQL API The vendor or an official module provides a GraphQL API for content.	Built in 4	Built in Optimizely Graph, included in the CMS 13 licence. 2 8
Webhooks The CMS can call an external URL when content is created, changed or published.	Built in	Limited Graph webhooks fire on sync batches and expired content only. Per-item hooks need code. 7 2
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 ASP.NET Core MVC and Razor rendering, or headless. 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 9
Scheduled publishing An editor can set a future date and time for content to publish or unpublish.	Built in 6	Built in 9
Version history The CMS keeps earlier versions of an entry, and editors can compare or restore them.	Built in	Built in
Preview Editors can see unpublished content rendered as it will appear on the site before publishing.	Built in 12	Built in
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. 1 12	Built in Visual Builder. 2
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. 1 7	Built in Approval sequences. 10
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	Built in Projects publish or schedule grouped items together. 11
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 Comments and notifications only. 12
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 Access rights for roles and virtual roles. 13
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. 1 9	Not available Access rights apply per content item. Not documented per property. 13
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	Built in Opti ID with an external identity provider, or OpenID Connect in code. 2
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 Change Log in Settings. 14
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	Built in Several sites and hosts in one installation. 15
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 Shell modules, gadgets and custom editor widgets. 16
Plugin marketplace The vendor runs an official directory or marketplace of installable extensions.	Built in Contentstack Marketplace. 13	Built in Optimizely connectors directory and NuGet add-ons. 17
Form builder Editors can build and publish forms and collect submissions without code.	Not available	Plugin or add-on Optimizely Forms package. No extra licence. 18
Site member accounts The platform handles sign-up and login for public site users or members, separate from editors.	Not available	Limited Visitor login uses ASP.NET Core authentication set up in code. 2
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. 1 13	Plugin or add-on Opal, billed through Opal credits. Needs Opti ID on DXP. 2 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 MCP server in the Optimizely.Cms.Opal.Tools package. 20

Contentstack sources

Checked 29 Sept 2026. Contentstack Content Cloud headless CMS, Free, Growth and Enterprise plans.

Optimizely CMS sources

Checked 29 Sept 2026. Optimizely CMS 13 PaaS, the current flagship. CMS SaaS is a separate hosted variant..

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

Where they differ

Contentstack and Optimizely CMS get a different status on 11 of the 28 features and the same status on 17. Contentstack has 17 built in on its baseline edition, Optimizely CMS has 22. Two matching statuses can still name different paid tiers or limits, so read the notes in the table before treating a row as equal.

Self-hosting: Contentstack cannot be self-hosted. Optimizely CMS can be self-hosted.
Free option: Contentstack has a free option. Optimizely CMS has no free option.

Built in on Contentstack, a different answer on Optimizely CMS 1

Webhooks Contentstack: Built in. Optimizely CMS: Limited.

Built in on Optimizely CMS, a different answer on Contentstack 6

Content model in code Contentstack: Limited. Optimizely CMS: Built in.
Renders the website Contentstack: Not available. Optimizely CMS: Built in.
Approval workflows Contentstack: Paid tier. Optimizely CMS: Built in.
Custom roles Contentstack: Paid tier. Optimizely CMS: Built in.
Single sign-on Contentstack: Limited. Optimizely CMS: Built in.
Audit log Contentstack: Limited. Optimizely CMS: Built in.

Built in on neither, with different answers 4

Real-time co-editing Contentstack: Limited. Optimizely CMS: Not available.
Field-level permissions Contentstack: Paid tier. Optimizely CMS: Not available.
Form builder Contentstack: Not available. Optimizely CMS: Plugin or add-on.
Site member accounts Contentstack: Not available. Optimizely CMS: Limited.

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