Sitecore vs Optimizely: 2026 Comparison

Sitecore and Optimizely (formerly Episerver) are both enterprise digital experience platforms built on .NET, and both now offer a SaaS platform alongside PaaS and on-premise options, with AI built in. The biggest differences are where each is strongest: Optimizely leads on experimentation and has a dedicated B2B commerce product, while Sitecore offers a broad, composable suite with strong personalisation and content operations. The right choice depends on your priorities, your current platform and your team, not on which is “better” overall.

Remarkable is a Sitecore Platinum Partner and an Optimizely Platinum Solution Partner, so we implement both. This is how we compare them in 2026.

Sitecore vs Optimizely at a glance

Editing and content management

Both platforms now centre on visual, component-based page building. SitecoreAI gives marketers visual page building and a headless architecture by default. Optimizely’s Visual Builder is the default editor in both its SaaS CMS and CMS 13, and CMS 13 brings the PaaS version on Optimizely’s DXP cloud broadly level with SaaS. In both cases, the editing experience is far better than on older versions, which is a strong reason to upgrade from Sitecore XP or Optimizely CMS 11 and 12.

AI

Both vendors have made AI central to their platforms. Sitecore’s Agentic Studio, at the core of SitecoreAI, lets marketers build and run AI agents and multi-step Agentic Flows for campaign planning, content creation, migration and testing. It launched with 20 pre-built agents. Optimizely’s AI, renamed from Opal to the Optimizely Agent Platform in September 2026, works across the suite: CMS, content marketing, experimentation and commerce. Optimizely charges for the Agent Platform in usage credits, so check how AI is packaged and charged in any quote you compare.

Experimentation and personalisation

Experimentation is Optimizely’s heritage. Its Web and Feature Experimentation products are among the most widely used testing tools in the market and can be used with any website, not just Optimizely CMS. Sitecore’s strength is personalisation driven by customer data, through Sitecore CDP and Personalize, and SitecoreAI now includes A/B/n testing through its Conversion Optimization capability. If a structured testing programme is a priority, Optimizely has the edge. If real-time personalisation from a customer data platform matters most, Sitecore is a strong fit.

Commerce

Optimizely offers two commerce products: Configured Commerce, built for B2B manufacturers and distributors, and Commerce Connect for B2C, which runs alongside its CMS. Sitecore’s OrderCloud is a headless, API-first commerce platform that suits composable builds. For complex B2B selling, Optimizely’s dedicated product is usually the simpler route. Read our guide to Optimizely Commerce.

Cost

Neither vendor publishes prices. Both quote based on the products you need, your traffic and the number of sites, and both are significant enterprise investments once implementation is included. The cost difference usually comes down to which products you need: buying a CMS, experimentation, personalisation and commerce from one vendor tends to be cheaper than assembling them separately. Our Optimizely pricing guide explains what drives Optimizely costs.

If you are already on one of them

Most organisations comparing the two are already running one, often an older version. Switching platforms is a major project, so the first question is usually whether upgrading what you have is the better option. Sitecore XP customers can upgrade within XP or move to SitecoreAI, and our Sitecore Exposure Review costs those options in two weeks. Optimizely customers on CMS 11 or 12 can move to CMS 13 or to SaaS. Because we work with both platforms, we can give you a straight answer on whether switching makes sense.

Which should you choose?

• Choose Optimizely if experimentation is central to how you improve your digital channels, you sell B2B and need dedicated B2B commerce, or you want content, testing and commerce from a single suite.
• Choose Sitecore if personalisation driven by customer data is your priority, you have large-scale content operations across many brands and markets, or you want a composable suite you can assemble product by product.
• Stay where you are and upgrade if your current platform meets your needs and the cost of switching outweighs the gains.

Get an independent view. As a Sitecore Platinum Partner and an Optimizely Platinum Solution Partner, Remarkable implements both platforms and can help you choose, upgrade or migrate. Talk to our Sitecore or Optimizely teams, or get an Optimizely quote.