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CMS comparison Optimizely CMS vs Squarespace

Optimizely CMS vs Squarespace

Optimizely CMS is a closed-source enterprise DXP that you can host yourself or run on the vendor's cloud. Squarespace is a closed-source site builder that runs on the vendor's cloud. The table below sets them side by side on 28 features. They get a different status on 19.

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  • Optimizely CMS Enterprise DXP · Closed source · 22 of 28 built in
  • Squarespace Site builder · Closed source · 9 of 28 built in

Sources checked: Optimizely CMS on 29 Sept 2026, Squarespace 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
Optimizely CMS vs Squarespace feature comparison. Columns are the two platforms. Rows are features, grouped by area.
Platform
Optimizely CMS Enterprise DXP
Squarespace Site builder
Overview
What it is Optimizely's .NET CMS for rendered and headless sites, hosted on Optimizely's DXP cloud or self-hosted, with Optimizely Graph for delivery.Hosted website builder with templates, a visual editor, blogging and commerce. Squarespace runs the hosting.
Edition compared The product and release each column describes. Optimizely CMS 13 PaaS, the current flagship. CMS SaaS is a separate hosted variant. Version 13.1.3, released 9 Sept 2026 Squarespace website plans on version 7.1 SaaS, continuously updated
Vendor Optimizely optimizely.com Squarespace, Inc. squarespace.com
Licence Closed source Proprietary Closed source Proprietary
Hosting Self-hosting Vendor cloud Self-hosted installs lose Opti ID features such as Opal and the DAM. No self-hosting Vendor cloud
Built with .NET 10, ASP.NET CoreHosted SaaS, custom CSS and JavaScript on Core and higher plans
Database SQL Server, Azure SQL on DXPManaged by Squarespace
Pricing Public list prices only. Hosting and implementation are extra everywhere. No free option Pricing on request. No free option Basic $19, Core $29, Plus $49, Advanced $99 per month billed annually in the US. 14-day free trial.
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. Built in Content types as C# classes. 3 Limited Custom post types in template.conf, only with Developer Mode on version 7.0. 23
Content model in the UI Admins can create and change content types and fields in the admin interface without writing code. Built in Content types and properties in Settings. 4 Not available Fixed page and collection types. No custom fields in the editor. 2
Reusable blocks Editors compose pages from reusable, typed components or blocks, and can reorder them. Built in Blocks in content areas and Visual Builder elements. Built in Editors add and reorder sections and blocks.
Localization Editors translate content per locale inside the CMS, by field or by entry, without a separate site for each language. Built in Language branches per content item. 5 Plugin or add-on Weglot extension. Without it, editors duplicate pages per language. 45
Image transformations The CMS resizes, crops or converts images on request, through URL parameters or generated sizes, with no external service. Built in DXP CDN resizes, crops and converts images by URL parameters. 6 Built in Squarespace serves uploaded images in generated sizes.
APIs and delivery
REST API A documented REST or JSON HTTP API returns content. Built in Content Delivery API 13 and a management REST API. 12 Limited Commerce APIs for products, orders and inventory on Core and up. No API for pages. 16
GraphQL API The vendor or an official module provides a GraphQL API for content. Built in Optimizely Graph, included in the CMS 13 licence. 28 Not available
Webhooks The CMS can call an external URL when content is created, changed or published. Limited Graph webhooks fire on sync batches and expired content only. Per-item hooks need code. 72 Limited Commerce events only, through the Webhook Subscriptions API. 7
Renders the website The CMS itself renders and serves the public pages through themes or templates. Headless-only products answer no. Built in ASP.NET Core MVC and Razor rendering, or headless. 2 Built in
Editorial workflow
Drafts Editors save changes as a draft and publish them later. The live version stays untouched until then. Built in 9 Paid tier Page drafts need a Premium or Enterprise plan. Blog posts can be drafts on any plan. 8
Scheduled publishing An editor can set a future date and time for content to publish or unpublish. Built in 9 Limited Blog posts only. 9
Version history The CMS keeps earlier versions of an entry, and editors can compare or restore them. Built in Not available Undo and redo within an editing session only. 10
Preview Editors can see unpublished content rendered as it will appear on the site before publishing. Built in Built in Editing happens on the rendered page.
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 Builder. 2 Built in
Approval workflows Content moves through review stages you configure, such as draft, review and approved, with permissions per stage. Built in Approval sequences. 10 Limited Enterprise Draft editor role drafts pages for an admin to publish. No custom stages. 811
Content releases Editors group changes across several entries and publish them together as one release. Built in Projects publish or schedule grouped items together. 11 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. Not available Comments and notifications only. 12 Not available
Access and governance
Custom roles Admins define their own roles with granular permissions instead of picking from a fixed set. Built in Access rights for roles and virtual roles. 13 Not available Fixed contributor permission types. 11
Field-level permissions Admins can restrict access to single fields, on top of content types and entries. Not available Access rights apply per content item. Not documented per property. 13 Not available
Single sign-on Editors can sign in through SAML or OpenID Connect against a company identity provider. Built in Opti ID with an external identity provider, or OpenID Connect in code. 2 Paid tier Premium and Enterprise plans. OpenID Connect through Entra ID, SAML through Google. 1718
Audit log The CMS logs who changed what and when across the whole installation, and admins can review the log. Built in Change Log in Settings. 14 Not available
Platform and extensibility
Multiple sites One installation or account can manage several separate websites or brands with shared users. Built in Several sites and hosts in one installation. 15 Limited Each site needs its own plan. Enterprise teams manage several sites from one account. 11
Extensible admin UI Developers can add their own components, views or fields to the editing interface. Built in Shell modules, gadgets and custom editor widgets. 16 Not available
Plugin marketplace The vendor runs an official directory or marketplace of installable extensions. Built in Optimizely connectors directory and NuGet add-ons. 17 Built in Squarespace Extensions, a directory of third-party tools. 12
Form builder Editors can build and publish forms and collect submissions without code. Plugin or add-on Optimizely Forms package. No extra licence. 18 Built in Form blocks store submissions. 13
Site member accounts The platform handles sign-up and login for public site users or members, separate from editors. Limited Visitor login uses ASP.NET Core authentication set up in code. 2 Built in Customer accounts on all plans. Member sites for gated content. 114
AI writing assistant A first-party AI feature in the editing interface generates, rewrites or translates content. Plugin or add-on Opal, billed through Opal credits. Needs Opti ID on DXP. 219 Built in Squarespace AI writer. Monthly AI credits vary by plan. 115
Official MCP server The vendor publishes a Model Context Protocol server so AI agents can read or write content. Built in MCP server in the Optimizely.Cms.Opal.Tools package. 20 Not available The official MCP server covers domain search only. It can't reach site content. 16

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

Where they differ

Optimizely CMS and Squarespace get a different status on 19 of the 28 features and the same status on 9. Optimizely CMS has 22 built in on its baseline edition, Squarespace has 9. 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
Optimizely CMS can be self-hosted. Squarespace cannot be self-hosted.

Built in on Optimizely CMS, a different answer on Squarespace 16

  • Content model in code Optimizely CMS: Built in. Squarespace: Limited.
  • Content model in the UI Optimizely CMS: Built in. Squarespace: Not available.
  • Localization Optimizely CMS: Built in. Squarespace: Plugin or add-on.
  • REST API Optimizely CMS: Built in. Squarespace: Limited.
  • GraphQL API Optimizely CMS: Built in. Squarespace: Not available.
  • Drafts Optimizely CMS: Built in. Squarespace: Paid tier.
  • Scheduled publishing Optimizely CMS: Built in. Squarespace: Limited.
  • Version history Optimizely CMS: Built in. Squarespace: Not available.
  • Approval workflows Optimizely CMS: Built in. Squarespace: Limited.
  • Content releases Optimizely CMS: Built in. Squarespace: Not available.
  • Custom roles Optimizely CMS: Built in. Squarespace: Not available.
  • Single sign-on Optimizely CMS: Built in. Squarespace: Paid tier.
  • Audit log Optimizely CMS: Built in. Squarespace: Not available.
  • Multiple sites Optimizely CMS: Built in. Squarespace: Limited.
  • Extensible admin UI Optimizely CMS: Built in. Squarespace: Not available.
  • Official MCP server Optimizely CMS: Built in. Squarespace: Not available.

Built in on Squarespace, a different answer on Optimizely CMS 3

  • Form builder Optimizely CMS: Plugin or add-on. Squarespace: Built in.
  • Site member accounts Optimizely CMS: Limited. Squarespace: Built in.
  • AI writing assistant Optimizely CMS: Plugin or add-on. Squarespace: Built in.

More comparisons

Full write-ups with worked examples and costs: Optimizely CMS vs Payload.

Optimizely CMS against other platforms

Squarespace against other platforms

Open the CMS comparison tool to put up to six platforms in one table.

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