Mattermost v11.6: Deeper Sovereign AI Integration, Hardened URL Privacy, Expanded Multi-Window Support & More

Mattermost v11.6 brings sovereign AI agents directly into the workflows where teams already operate, strengthens operational security with ID-based URLs, and improves focus with enhanced multi-window support.

Upgrade your Mattermost server today to start using these features.

Sovereign Agents & AI-Powered Collaboration

Mattermost Professional, Mattermost Enterprise, Mattermost Enterprise Advanced

AI agents are only useful if people can actually find them. When agents live in specific channels or require users to remember where they were added, adoption stalls.

Mattermost v11.6 accelerates AI adoption with agents that now show up in the @-mention menu, just like any other teammate, so your team won’t waste time hunting them down or trying to remember what channel they’re in. The result is AI assistance that surfaces exactly where work is already happening, reducing context switching and keeping teams in flow.

For organizations running sovereign AI deployments — models hosted inside their own security boundaries rather than routed through third-party cloud services — this is a significant capability. Agents are available directly within a fully controlled, unified environment, making it easier to unlock the operational benefits of AI without compromising data sovereignty or the organization’s security posture. 

Learn more about Mattermost Agents.

Anonymous, ID-Based URLs 

Mattermost Professional, Mattermost Enterprise, Mattermost Enterprise Advanced

Mattermost v11.6 replaces human-readable team and channel names in shared links with system-generated identifiers — removing a passive reconnaissance vector that required no credentials to exploit.

Until now, every shared channel link exposed team and channel names in plain text. In sensitive or mission-critical environments, that metadata alone could give an adversary meaningful insights into organizational structure or ongoing operations.

For defense, intelligence, and critical infrastructure organizations, this is a meaningful OPSEC improvement.

Learn more about ID-based URLs.

Multi-Window Pop-Outs for Search, Recent Messages & Pinned Messages

Mattermost Professional, Mattermost Enterprise, Mattermost Enterprise Advanced

During incidents or high-stakes operations, search results, pinned messages, and recent mentions compete for space with the main conversation — forcing critical context off-screen at the worst possible moment.

Mattermost v11.6 expands multi-window support to search results, pinned messages, and mentions. Pop out search results onto a second monitor, keep mentions visible while tracking a live thread, or pin critical messages where they can’t get buried.

The main conversation stays front and center, and everything else stays in view.

Get the latest version of the Desktop App to try this feature.

Invite Single-Channel Guests without Adding Licenses

Mattermost Professional, Mattermost Enterprise, Mattermost Enterprise Advanced

Until now, every guest account in Mattermost has counted as a full seat against your license, regardless of how limited their access is or how infrequently they collaborate. For organizations that regularly bring in external collaborators for a single project, that’s been a real cost.

With the v11.6 release, Mattermost is changing this across all licensed tiers — Pro, Enterprise, and Enterprise Advanced. Single-channel guest users are now free and will no longer count toward a licensed seat, up to a 1:1 ratio with your licensed users. Guests who belong to multiple channels continue to consume a seat. 

To illustrate: A 50-seat license now supports up to 50 single-channel guests — effectively doubling collaboration capacity for scoped external engagements while freeing up seats for your own organization at no additional cost. 

Note that the Activated Users count on your License page will decrease as a result, with single-channel guests now tracked separately. This reflects a redistribution of existing numbers, not a loss of users.

For defense, intelligence, and critical infrastructure organizations, mission success depends on tightly controlled, need-to-know collaboration among the right people. Now you can do more with the licenses you already have. 

Learn more about single-channel guests.

Pexip Plugin: Smarter Calls, Sharper Screen Sharing & Zero Status Drift

Mattermost Professional, Mattermost Enterprise, Mattermost Enterprise Advanced

Secure video communication in mission-critical operations demands precision — the right call, the right content, the right status, every time. The Mattermost Pexip plugin delivers better notifications, improved screen sharing controls, and a tighter collaboration experience:

• Never miss a direct call — Incoming 1:1 video calls now have their own distinct ringtone, clearly distinguishing them from group calls or other notifications
• Smoother multitasking while presenting — Pop out video calls into separate windows while screen sharing, so you can manage the conversation without losing sight of your content
• Know exactly what you’re sharing — Presenters can now clearly identify which browser tab is active during a screen share session, reducing the risk of accidentally exposing the wrong content
• Join active calls in one click — Ongoing calls are now visible directly in the channel sidebar, so team members can jump in without hunting for the right channel
• Automatic status sync — Your Mattermost status updates automatically when you enter a Pexip meeting, keeping your availability accurate without any manual action.

The plugin also includes security, administrative, and compliance improvements.

The result? Teams speed less time managing their tools and more time on the mission.

Learn more about the Mattermost Pexip plugin.

Try Mattermost v11.6 today

Upgrade your Mattermost server to start using these new capabilities. 

For a complete list of updates and improvements included in this release, visit the Mattermost v11 Changelog.