Our team will be at TriCyCIS 2026 on 1 July, joining defence, government, industry, and academic leaders as they examine progress on the UK’s Strategic Defence Review one year on. As Defence accelerates its Plan for Change, secure, sovereign, and resilient collaboration is essential for cyber, EM, intelligence, and digital teams operating in contested environments. We’re looking forward to contributing to the conversations shaping how Defence strengthens integration, digital transformation, and mission readiness. If you’re attending, connect with us to explore how Mattermost supports teams working to keep Britain safer at home and stronger abroad. #TriCyCIS2026 #AFCEA #DefenceTech #CyberSecurity #SecureCollaboration #ZeroTrust #MissionCritical #OperationalResilience #SovereignTech #PublicSectorTech

If a file leaves your tenant protected, is the content still secure? Read the blog🔗 zurl.co/q0iIz Access controls are only the first layer. Real protection follows the document beyond the doorway. #Microsoft365 #DataSecurity #SecureCollaboration #Govern365

What does AI look like when it actually works where operators work, not just in a lab. That’s the question Nick Brown tackled onsite at the Gartner Security & Risk Management Summit in his Flash Talk: “AI that works where you do: Mattermost Agents in Action.” In this discussion, Nick shows how Mattermost Agents bring AI directly into mission workflows, supporting teams in connected, disconnected, and contested environments, and delivering real operational value without sacrificing sovereignty or control. If you missed it at the Summit, now’s your chance to see how AI can truly operate at mission tempo. #AIAgents #SecureCollaboration #AIGovernance #MissionCritical #CyberSecurity #SRMSummit

We’re excited to join infodass' Data-Centric Security Deep Dive today, bringing together leaders in secure digital transformation, cross‑domain solutions, and mission‑ready technologies. Mattermost powers secure, flexible collaboration for defense, government, and critical infrastructure teams, and partnering with innovators like Infodas strengthens the ecosystem these missions rely on. Looking forward to connecting with the community and demonstrating how Mattermost supports secure workflows at every classification level. infodas.com/en/data-centric-… #Infodas #CyberSecurity #SecureCollaboration #DefenseTech #MissionCritical

AI is already inside your collaboration stack — but does your governance actually know what it’s doing there. That’s the question Keith Casey, our Senior Product Manager, tackled onsite at @Gartner_inc Security and Risk Management Summit in his Flash Talk: “AI Moved into Your Collaboration Stack. Does Your Governance Know That?” If you weren’t at the event, here’s your chance to catch what you missed. Is your organization governing the AI that’s already influencing your decisions, data, and operations? #Mattermost #AIGovernance #SecureCollaboration #CyberSecurity #RiskManagement #AIInTheEnterprise #MissionCritical

What a week at the @Gartner_inc Security & Risk Management Symposium. From packed Flash Talks to nonstop in‑booth demos, the energy around secure, AI‑ready collaboration was incredible. A huge highlight: @LeighDow and Bill Anderson taking the stage to share how organizations are modernizing incident response and strengthening mission‑critical workflows. Their session sparked some of our most insightful conversations of the week. Thank you to everyone who stopped by, asked questions, joined a demo, or shared your challenges. And if you missed our Flash Talks — good news. We’ll be publishing the full video series later this week. We headed home inspired and ready for what’s next. #GartnerSEC #SecureCollaboration #MissionCritical

Why do so many organizations lose control after detection, not before it? Featured in @Infosecurity, our latest post by James Mullins breaks down a pattern emerging across European incident reviews, NIS2/DORA assessments, and ENISA crisis exercises: - It’s not the technical response that fails first. - It’s the coordination layer. When communication fragments, escalation slows, and leadership loses a shared operational picture, control is already slipping, even when detection and containment are strong. infosecurity-magazine.com/bl… #Mattermost #InfosecEU #CyberResilience #NIS2 #DORA #IncidentResponse #SecureCollaboration

Imagine being able to collaborate with fellow researchers from all over the world on the most cutting-edge AI projects without worrying about security or data breaches. This concept may seem like the stuff of science fiction, but it's an idea that's gaining traction in the world of AI research, thanks in part to innovators like @TheARCTERMINAL. Their vision for a private and encrypted platform has the potential to revolutionize the way researchers collaborate and push the boundaries of AI intelligence. As global collaboration becomes increasingly prevalent, the stakes are higher than ever. With researchers from diverse backgrounds and institutions working together, the risk of data breaches and intellectual property theft is elevated. However, a secure platform like the one proposed by @TheARCTERMINAL would provide a safeguard against these threats, allowing researchers to focus on the real challenge: developing AI systems that can learn, adapt, and solve complex problems. By providing a secure environment for collaboration, researchers can share their findings, expertise, and resources without fear of compromise. This, in turn, can lead to breakthroughs that might not have been possible in a more isolated or insecure setting. For instance, imagine a group of researchers from top universities and institutions working together on a project to develop AI-powered solutions for climate change. With a secure platform, they could share their data, models, and findings seamlessly, accelerating the development of effective solutions. The potential benefits of secure collaboration in AI research are vast and varied. Not only can it lead to faster breakthroughs and more innovative solutions, but it can also foster a sense of community and cooperation among researchers from around the world. By working together, sharing knowledge and resources, and pushing the boundaries of what's possible, researchers can create a future where AI is harnessed for the greater good. In the words of @TheARCTERMINAL, a secure platform for AI research is not just a nicety, but a necessity for the future of innovation. As the world becomes increasingly interconnected, the need for secure collaboration has never been more pressing. By investing in a platform that prioritizes security, researchers can ensure that their work is protected, their data is safe, and their discoveries can benefit humanity as a whole. #SecureCollaboration #AIResearch #FutureOfInnovation

We're headed to the @Gartner_inc Security & Risk Management Summit, with a message security leaders need now. Our Principal Product Manager Bill Anderson and CMO @LeighDow will present: Taking Command of AI in Security Operations: Designing for Sovereignty, Resilience, and Control gartner.com/en/conferences/n… Join us at Gartner SRM to explore a sovereignty‑first approach to resilient, AI‑ready security operations. #GartnerSecurity #SovereignAI #DataSovereignty #CyberResilience #SecureCollaboration #AIinSecurity

We extend our gratitude to our speakers Matthias Van Steen, Hassan Zarhoun and everyone who joined us for the session. #CyberSecurity #DataSecurity #ManagedFileTransfer #Compliance #SecureCollaboration #DigitalTransformation

We're on the ground at SOF Week 2026, connecting with the operators, technologists, and mission partners who rely on secure, sovereign collaboration to move missions forward. If you’re at SOF Week, stop by to see our team! #SOFWeek #SOFWeek2026 #SpecialOperations #MissionCritical #DefenseTechnology #SecureCollaboration #TacticalEdge #C2 #ZeroTrust #CUI #NIST800171 #CMMC

Coalition missions don’t break because people make bad choices, they break because the infrastructure they’re given can’t keep up with the mission they’re running. Shadow IT isn’t a discipline issue. It’s a signal, a warning flare that today’s coalition environments still demand real‑time, multilingual, multi‑classification coordination that legacy, single‑network tools were never built to handle. mattermost.com/blog/why-coal… #MissionCritical #CoalitionOperations #ShadowIT #SecureCollaboration #MPE #CJADC2

We're proud to sponsor the @Gartner_inc Security & Risk Management Summit. As organizations push to secure AI‑driven, distributed, and high‑stakes environments, leaders need solutions that deliver sovereignty, resilience, and control across every workflow. We’re excited to support this year’s conversations on secure collaboration, AI‑enabled operations, and the architectures shaping the future of security. See you at Gartner SRM. gartner.com/en/conferences/n… #GartnerSecurity #GartnerSRM #CyberResilience #SecureCollaboration #DataSovereignty #SecurityOperations

Wikimedia Deutschland, one of the world’s largest Wikimedia chapters, has standardized internal communication on self‑hosted Mattermost to strengthen data sovereignty, streamline cross‑team collaboration, and support its mission to keep knowledge free. By centralizing communication, ensuring GDPR and Schrems II compliance, and extending workflows with powerful plugins, the organization has built a more connected, efficient, and privacy‑first environment for staff and volunteers. mattermost.com/customers/wik… #OpenSource #DataSovereignty #GDPR #SecureCollaboration #DigitalSovereignty

Mattermost v11.6 delivers a major boost to how organizations collaborate with external partners — without increasing licensing costs. Until now, every guest account counted as a full licensed seat, even if that user only needed access to a single channel for a short‑term project. For teams that regularly bring in external collaborators, that added up fast. Single‑channel guest users are now free and no longer consume a licensed seat, up to a 1:1 ratio with your licensed users. mattermost.com/blog/mattermo… #SecureCollaboration #MissionCritical #DefenseTech #ZeroTrust #CyberResilience #CriticalInfrastructure #CollaborationTools #GovTech

The Mattermost team is on the ground at CyberUK 2026 as the event kicks off today — connecting with leaders across government, defense, and national security who are shaping the future of secure, sovereign collaboration. As missions become more distributed and cyber threats more sophisticated, organizations need platforms they can fully control. Mattermost enables sovereign, mission‑critical communication across classified, coalition, and DDIL environments. If you’re attending, come meet the team and see how we’re helping organizations strengthen operational resilience and data sovereignty. #CyberUK #CyberUK2026 #SecureCollaboration #NationalSecurity #DefenseTech #ZeroTrust

Mattermost v11.6 introduces a meaningful OPSEC enhancement for teams operating in sensitive, high‑stakes environments. Shared links no longer expose human‑readable team or channel names. Instead, Mattermost now uses system‑generated identifiers, eliminating a passive reconnaissance vector that previously required no credentials to exploit. For defense, intelligence, and critical infrastructure organizations, removing this metadata leakage closes a subtle but valuable window into organizational structure and operational activity. mattermost.com/blog/mattermo… #SecureCollaboration #OPSEC #ZeroTrust #MissionCritical #CyberResilience #DefenseTech #CriticalInfrastructure #DataProtection

When 20,000 computer scientists need fast, secure collaboration, email can’t keep up. GI moved to a self‑hosted Mattermost deployment to streamline communication, protect student data, and enable real‑time teamwork across universities and industry partners. With Mattermost, GI now delivers: 🔹 6x faster research proposal timelines 🔹 GDPR‑compliant, fully sovereign collaboration 🔹 Instant, flexible communication across 30 chapters mattermost.com/customers/ger… #OpenSource #SecureCollaboration #GDPRCompliance #DataSovereignty

A huge thank you to every contributor who helped bring Mattermost v11.6 to life. This release delivers mission‑ready admin controls, streamlined Zero Trust ABAC, deeper AI integration, anonymous ID‑based URLs, expanded multi‑window workflows, free single‑channel guests, and major improvements to the Pexip plugin, and none of it would be possible without the global community of developers, reviewers, testers, designers, and security experts who power Mattermost forward. Thank you for your expertise, your commitment, and your impact. #OpenSource #Contributors #CommunityDriven #SecureCollaboration #ReleaseDay

Modern missions don’t wait for ideal conditions, and neither can the technology supporting them. In @Oracle's latest Defense Ecosystem spotlight, Oracle highlights how Mattermost delivers secure, mission‑critical collaboration and sovereign AI across Oracle Cloud Infrastructure (OCI), including air‑gapped and DDIL environments. From command and control to the tactical edge, teams get the real‑time intelligence and coordination they need to act fast and stay aligned. As sovereign infrastructure becomes a strategic priority, Oracle and Mattermost provide a trusted, mission‑ready foundation for national security, defense, and public safety organizations. 📘 blogs.oracle.com/cloud-infra… #SovereignAI #MissionCritical #DefenseTech #GovTech #SecureCollaboration #DDIL