Mark goes desktop: what's new in Optimizely Agent Platform, November 2026

Optimizely's November release for Mark, the Optimizely Agent Platform, is one of the most significant updates since the platform launched. Two changes stand out above everything else: Mark is now available as a native desktop app, and OpenAI has joined Google and Anthropic as a model provider. Together, they move Optimizely firmly into the same space as the AI platforms people already use every day, while keeping everything connected to Optimizely One.

Here's what's in the release, why it matters and where I think teams will see the most value.

The November release at a glance

1. The Mark desktop app: Optimizely steps out of the browser tab

This is the update I'm most excited about. Mark is now a native application for Windows, macOS and Linux, with mobile on the way.

On the surface, it solves a familiar frustration: no more hunting for Mark across a sea of browser tabs. Mark stays open alongside your other tools, and you get a desktop notification when a response finishes, so you can hand off a task and carry on with something else.

The real step change, though, is local file access. Through Workspaces, you choose specific folders on your computer that Mark can work with. Agents can then browse, read, search, create and update files in those folders, and even run commands, without you uploading anything first. Think briefs, content drafts, exported reports, spreadsheets or a folder of campaign assets, all available to your agents where they already live.

This is exactly what has made desktop apps from other AI providers so popular, and it brings Mark into line with them. The difference is that Mark also carries your Optimizely context: your connected CMS, Experimentation and CMP instances, your skills, your Brand Packs and your agents.

Importantly, it has been built with control in mind:

• Agents can only work inside the folders you have granted access to, and you can revoke access at any time
• Mark asks for confirmation before anything destructive, such as writing or deleting files or running commands that change your system
• Overly broad folders, such as your entire home directory, are refused in favour of something more specific
• Sign-in is through Opti ID, and administrators still control who has access

For organisations thinking about AI governance, which is something we're working through closely at Niteco with our own Virtual Teammates, this balance of capability and control is exactly right. And if you're already working in Mark in the browser, an "Open Desktop App" button gets you straight across.

You can download the desktop app here, and the desktop app documentation covers setup in detail.

2. OpenAI joins Google and Anthropic

Mark now supports OpenAI models alongside Google Gemini and Anthropic Claude. You can set the model provider that suits your organisation, choose a different one for individual agents, or let the platform pick the best model for the job.

Why does this matter? Different models genuinely have different strengths. Some are faster and more cost-effective for high-volume content work, others are stronger at complex tool orchestration and reasoning. Having all three major providers available means:

• No lock-in. You aren't tied to a single AI vendor's roadmap or pricing
• Right model, right task. Agents can be tuned individually rather than everything running on one default
• Easier adoption. Many organisations have already standardised on, or approved, a particular provider. That conversation just got simpler
• Future-proofing. As models leapfrog each other, you can move with them without rebuilding your agents

3. Agent value tracking: putting a number on ROI

One of the most common questions we hear from clients is, "What is this actually worth?" Agent value tracking answers that. Administrators can assign custom value metrics to each agent, which then appear in execution logs and exports. Reporting on time saved or value delivered becomes a straightforward exercise rather than a spreadsheet project.

4. Agent ownership transfer

Every agent now has a single, visible owner, and ownership can be handed over through a consent-based flow. It's a small change with real governance value: when someone changes role or leaves, their agents don't become orphaned.

5. New and updated agents

• GEO Readiness Scorer: a single, trackable score for how ready your site is to be cited by AI search experiences such as ChatGPT, Google AI Overviews, Perplexity and Claude. It works with any website, and it pairs nicely with the agent-readiness theme I covered in my last post
• Flag Idea Builder: turns a test idea into a ready-to-approve experiment in Feature Experimentation, with the flag, environments, metrics and audiences set up for you
• Feature Experimentation Governance Agent (updated): faster and uses fewer credits, with the same governance checks

6. Connectors

• Connectors can now be installed directly within the platform, with no trip over to OCP
• Users can request a connector and an administrator approves it
• New connectors for Adobe Experience Manager, Siteimprove (accessibility scanning against WCAG, with fixes ranked by traffic and conversion value) and Microsoft Dynamics Sales

Final thoughts

The desktop app and multi-model support signal a clear direction: Mark is no longer just a feature inside Optimizely's products, it's becoming a primary place where marketing and digital teams do their work. Combined with value tracking and better governance, it's also becoming much easier to justify, measure and scale.

If you haven't tried it yet, download the desktop app, set up a workspace on a folder you use every day, and see how quickly it changes the way you work. You can see the full release in Optimizely's What's new in Optimizely Agent Platform: November 2026 video.

How can Niteco help you?

Niteco is the largest global certified Optimizely CMS and Commerce partner, with deep expertise in the Optimizely Agent Platform.

As Optimizely's largest certified partner in Optimizely CMS, Commerce, and the agent platform, we can help you with any of your strategic initiatives globally around content, commerce, or your organisational AI.

If you would like help getting the most out of Mark and the Optimizely Agent Platform, get in touch with us at Niteco: https://niteco.com/contact-us/