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1-1, group messaging, public and private channels, file sharing, link and media previews across web, PC, Mac, iOS and Android devices, with 1-1 audio calls and screen share, threaded discussions, search, custom branding themes and emojis, and availability in 20 languages.
Channels-based messaging including 1-1, group messaging, public and private channels, file sharing, link and media previews across web, PC, Mac, iOS, and Android devices.
Call another user to start a 1-1 audio discussion in web, desktop, and mobile experiences with optional screen sharing.
Search over messages and files in Mattermost. Core search happens in a relational database and is intended for deployments under 3 million posts and file entries. Beyond that scale, Enterprise Search is recommended.
Match your organizations look, feel and brand by customizing the site name, description, login brand image and text, as well as theme colors.
Hashtags in channel-based messaging enhance discoverability and organization by allowing users to tag key topics, themes, or initiatives directly within conversations. This makes it easier to filter, search, and follow relevant discussions across teams, improving collaboration and knowledge sharing.
Channel categorization helps teams stay organized by grouping related channels into custom sections, making it easier to navigate and prioritize conversations. This improves focus and efficiency, especially in high-volume workspaces where users need to quickly access the most relevant discussions.
Multiple languages including English (Australian, US), Bulgarian, Chinese (Simplified and Traditional), Dutch, French, German, Hungarian, Italian, Japanese, Korean, Persian, Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Turkish, Ukrainian, and Vietnamese.
Enables users to open multiple chat windows simultaneously, enhancing multitasking and productivity. This capability ensures that priority conversations remain visible at all times, enabling users to monitor live updates and engage in multiple discussions without losing track
Easily move information across Mattermost discussions and technical tooling outputs with built-in support for the Markdown technical formatting standard. Text formatting, code snippets, media embedding, tables, status indicators, and emojis render consistently across the Mattermost user experience and Markdown-compatible tools.
Elevate the focus of organizations with the ability for end users to specify the priority of messages as Standard (Default), Important, and Urgent. https://docs.mattermost.com/collaborate/message-priority.html#set-message-priority-beta
Mattermost’s Persistent Notifications feature ensures that urgent messages remain visible until acknowledged or replied to, enhancing the visibility of critical communications. Users can configure the frequency and maximum number of repeated notifications, ensuring that important alerts are not missed
Custom Profile Attributes in Mattermost give organizations the flexibility to define and manage user-specific metadata—such as location, roles, or mission assignments—tailored to their organizational needs. This enables more precise access control, smarter automation, and deeper personalization across workflows.
Work across teams and organizations with real-time calling and screen share, guest accounts to integrate internal and external stakeholders, custom user groups to organize teams within teams, and system-wide notifications to share organization-wide messages.
Notify users across teams of upcoming system maintenance, service changes, and other announcements using system-wide announcement banners.
Centralize and automate user identity and permissions with a range of single-sign-on (SSO), user synchronization and advanced access control. capabilities
Mattermost supports multifactor authentication (MFA), adding an extra layer of security beyond traditional username and password. This feature ensures that unauthorized users are denied access even if passwords are compromised, reducing the risk of account breaches
Mattermost’s Single Sign-On (SSO) feature allows users to log into multiple applications with a single set of credentials, streamlining the login process and enhancing security. This integration supports various SSO providers, including SAML, OpenID Connect, and OAuth 2.0, ensuring seamless and secure access across platforms
AD/LDAP User Sync feature ensures seamless synchronization of user attributes and group memberships from Active Directory or LDAP directories. This integration automates user management, maintaining up-to-date user information and access controls across the platform
Mattermost’s Integrations Platform offers operational extensibility with pre-packaged, source-available connectors, automations, and templates for rapid and effective systems integration. This platform supports seamless integration with modern toolchains and legacy systems, enhancing workflow automation and collaboration
Mattermost’s Integrations Platform offers operational extensibility with pre-packaged, source-available connectors, automations, and templates for rapid and effective systems integration. This platform supports seamless integration with modern toolchains and legacy systems, enhancing workflow automation and collaboration
Mattermost’s Integrations Platform enhances operational and DevOps workflows by seamlessly integrating with modern toolchains and legacy systems. This platform supports rapid and effective systems integration with pre-packaged, source-available connectors, automations, and templates, ensuring streamlined collaboration and increased productivity. Mattermost pre-packages integrations with most common developer tools, including Jira, GitHub, GitLab, Zoom, and more.
Mattermost integrates seamlessly with Microsoft 365 and other Security Suites, enhancing real-time, out-of-band AI-enhanced security collaboration. This integration ensures critical decisions are made securely without disruption or adversary surveillance. Key integrations include Microsoft Sentinel, Microsoft Defender, EntraID, and Intune, providing a comprehensive security solution
Achieve scale and resilience through cluster-based architecture, horizontal scaling, Kubernetes orchestration, and advanced performance monitoring and logging.
Mattermost’s provides a secure, resilientAgentic platform for mission-critical operations. By integrating AI-driven workflows, real-time collaboration, and advanced security controls, this feature accelerates decision-making and execution while maintaining complete data control in air-gapped, private, or sovereign cloud environments. Integrate your preferred LLM, including local models, in 1-1, group messaging, public and private channels, with audio calls and screen share, and threaded discussions to speed workflows, increase efficiency and unlock innovation.
Interactive AI Bot Support in Mattermost enhances collaboration by integrating AI-driven bots that assist with workflows, provide real-time updates, and automate routine tasks. These bots can interact with users and each other, leveraging multiple models and configurations to streamline operations and improve efficiency
Mattermost’s Flexible Bring-Your-Own-LLM Integration allows organizations to integrate their privately hosted language models into the Mattermost platform. This feature supports multiple AI/LLM service backends and ensures unified management, observability, and reliability of both private and commercial LLMs, providing a consistent interface and enhanced security for mission-critical operations
Mattermost supports Sovereign AI, enabling secure, mission-critical operations with full data sovereignty. This feature allows deployment in air-gapped, private, or sovereign cloud environments, ensuring that sensitive data remains under complete control while leveraging AI to streamline workflows, communication, and incident response
Contextual Summarization and Composition in Mattermost leverages AI to provide concise summaries and generate relevant content based on the context of discussions. This feature enhances productivity by allowing users to quickly grasp key points and compose responses without reviewing the raw input, ensuring efficient and informed communication
Mattermost’s Real-time Channel Briefing feature brings teams together for coordinated remediation and situational awareness. By integrating live transcription, call recordings, and automated summaries, this feature ensures clarity and alignment during high-stakes situations. Critical information, such as chat logs, call transcripts, and audio recordings, are preserved in the Call thread, providing searchable documentation for post-incident analysis and compliance
Ensures that AI-powered assistance in Mattermost operates within strict security boundaries by user, and by channel. This allows organizations to confidently deploy AI in sensitive environments, ensuring that only authorized users can access or generate insights from protected data.
Mattermost’s Model Context Protocol (MCP) support empowers AI to securely search across enterprise systems and take action in real time—without leaving the Mattermost environment. Through the Universal Connector, AI models can access external tools, retrieve knowledge, and trigger workflows using a standardized, scalable framework. This enables faster, smarter decision-making by turning conversations into context-aware, cross-system actions—securely and at scale.
Advanced logging mode in Mattermost provides comprehensive tracking of all system activities, enabling detailed auditing and troubleshooting. This experimental feature allows administrators to capture and analyze extensive trace data, ensuring transparency and aiding in compliance with stringent security and operational standards
Mattermost’s Copilot-enhanced Search uses semantic understanding and Retrieval-Augmented Generation (RAG) to deliver highly relevant, context-aware answers across your workspace. By combining AI with secure access controls, it not only finds the right information—even when phrased differently—but also summarizes it with references to the original source, so users can trust and verify results. This empowers teams to move faster, make informed decisions, and unlock insights from across systems—all within a secure, mission-ready environment.
Enhances global collaboration by automatically translating channel conversations into each user’s preferred language, reducing friction and improving clarity across multilingual teams. This AI-powered capability ensures that users can navigate and engage with Mattermost environments more intuitively, regardless of language barriers.
Enterprise LLM Management in Mattermost empowers organizations to efficiently manage and deploy large language models, enabling granular billing and usage tracking. Assign LLM account authorizations at the user, group, or team level, and track LLM token usage at the user level for optimal performance and accountability.
Mattermost’s Critical Infrastructure Hardening ensures your collaboration environment meets the highest security standards with FIPS 140-3 validated cryptography and STIG-hardened images approved by the U.S. Department of Defense. These features provide robust protection for sensitive and classified data, helping organizations maintain compliance and operational integrity in even the most demanding environments.
Mattermost is available in a FIPS-validated image for FedRAMP compliance, satisfying the US government’s NIST 800-53 standards. This ensures that cryptographic modules used by agencies meet specific security requirements for processing sensitive, classified, or regulated data
Mattermost offers a STIG-hardened DISA-approved image, ensuring compliance with the Department of Defense’s Security Technical Implementation Guides (STIGs). This secure configuration standard is critical for maintaining the integrity and security of DoD Information Assurance (IA) and IA-enabled devices and systems, providing a robust solution for processing classified and sensitive information
Streamline and automate workflows to reduce errors and delays while increasing efficiency and innovation using collaborative playbooks to speed structured team processes, from incident response and software release cycle management to accelerating operational logistics, as well as workflow dashboards to assess and refine process outcomes and operations.
Collaborative playbooks provide structure, monitoring, and automation for repeatable, team-based processes integrated with the Mattermost platform. They enable seamless coordination across departments, ensuring efficient incident response, software release management, and logistical operations
Workflow dashboards provide a centralized view of all ongoing playbooks, enabling teams to track progress, and manage workflows efficiently. With real-time data updates and historical summaries, these dashboards enhance productivity by automating repetitive tasks and empowering teams to focus on strategic initiatives
Mobile playbooks bring the power of Mattermost Playbooks to your mobile device, enabling field workers, airmen, and government personnel to collaborate and execute mission-critical workflows on the go. This feature allows users to interact with playbooks, view checklists, and mark items as completed, ensuring productivity and efficiency no matter where they are
Conditional workflows increase compliance by consolidating the user experience for complex and evolving processes into one place. They enable users to execute and follow a single general playbook per procedure, ensuring a comprehensive audit log of all user actions in a single playbook run
Automated actions increase speed and reduce user workload by automatically executing process steps. These actions can be triggered by users changing playbook properties or through integrations, allowing status updates to and from third-party systems like Jira, notifying users, inviting them to join the playbook, and using third-party tools to execute process steps without user involvement
Enhanced run reports allow you to analyze and summarize playbook activities, define custom reports, and export those reports in PDF format. This feature provides comprehensive insights into workflow performance, enabling better decision-making and streamlined operations
Meet enterprise and critical infrastructure compliance requirements with advanced identity and access control synchronization, delegated administration roles, granular data retention policies, eDiscovery, legal hold, and information export capabilities—alongside enforced acceptance of custom terms of service.
User roles (e.g., Admin, Channel Admin, User) are applied to all users in the system and determine access to system functions. These roles can be synchronized from AD/LDAP and updated automatically, ensuring that access permissions are always current and aligned with organizational policies
Archive, backup, or submit the contents of a channel into other systems to fulfill reporting and auditability requirements as needed.
Empower mission-critical teams with secure, seamless collaboration across voice, video, and messaging. With features like live-text transcription, AI-generated call summaries, and integrations with Pexip, Zoom, and Microsoft Teams, Mattermost ensures every conversation is captured, searchable, and actionable
Enhance mission-critical communication with Calls featuring Live-Text Transcription and AI Summaries in Mattermost. This capability captures every spoken word in real time and automatically generates concise, AI-powered summaries—ensuring your teams stay aligned, informed, and ready to act, even in fast-paced or high-pressure environments.
Elevate secure collaboration with Mattermost Video Integrations, including Pexip, Zoom, and Microsoft Teams. Whether self-hosted for maximum control or integrated with your existing video platforms, Mattermost enables seamless video calls, screen sharing, and chat—right within your channels—ensuring mission-critical communication stays secure, flexible, and fully under your command.
Support cross-organizational workflows through shared channels across Mattermost servers and integrated connectivity with Microsoft Teams for streamlined information flow.
Increase focus and adaptability across your organization by connecting users across Microsoft Teams and Mattermost. Microsoft Teams often serves as a centralized, organization-wide standard for general collaboration and everyday productivity, which can complicate the business case for customizing workflows and integrated toolsets to meet the specialized needs of technical and operational teams. Mattermost is often deployed to supplement a centralized, general purpose Microsoft Teams deployment with a dedicated environment for developers, security professionals, and operators. Integrated direct messaging and group messaging across Microsoft Teams and Mattermost deployments connects an organization to the best of both worlds, helping teams unlock their full potential.
Plan and manage projects, people and events with integrated Kanban boards, Calendars, Tasks, hierarchical and other relationships between any users and data in Mattermost.
Mattermost Boards empower teams to manage projects and mission-critical workflows with visual clarity and precision. With Kanban-style task tracking built into the secure Mattermost platform, teams can plan, prioritize, and execute work efficiently—whether in the office, in the field, or at the tactical edge.
Enforce stringent Zero Trust security policies through granular, user- and resource-specific controls. These features enable dynamic enforcement of access policies across all Mattermost data—channels, files and messages —based on customer-defined attributes such as clearance level, program affiliation, device type, and location, synchronized from Identity, Credential and Access Management (ICAM) platforms or a User Authoritative Source, and aligning with standards like the U.S. DOD CIO’s Zero Trust policy.
Dynamic and granular attribute-based access controls are the foundation of zero trust security. They allow organizations to define custom attributes for users and resources, synchronizing them from various computing systems and data sources
Zero Trust channel access control enables administrators to configure channels with policy enforcement using common expression language (CEL) or a simple GUI. This ensures that only users with the required credentials, program access, clearances, and device, network, or environmental data can enter protected channels
For classified environments where program names and other classification attributes are restricted, “Need to Know” attribute masking prevents system and channel administrators who do not possess the sensitive attribute from seeing it in the Mattermost zero trust policy manager. Administrators cannot create, edit, or view policies that contain attributes they are not cleared to see
Zero Trust security can be applied to all files in Mattermost, allowing administrators to enforce fine-grained controls for posting, viewing, and downloading files based on user, channel, role, location, network, device, and other environmental or profile attributes. For example, an organization can restrict file downloads to specific approved devices and prevent downloads to all BYOD devices
Organizations can synchronize environmental attributes produced by third-party Network, Endpoint security, Identity, Credential and Access Management, or other Security Management tools to enforce complex and dynamic zero trust policies. These policies can incorporate attributes such as device or asset and network state, Identity and Access Management status, network segmentation, presence and state of endpoint security and response, and anti-virus software on the endpoint, or any other relevant characteristic
For government organizations using a secure User Authoritative Source system, Personnel data regarding authorizations and clearances is typically not held with basic user profile information but must be queried as needed. The User Authoritative Source Interface enables government organizations to securely interface and query the UAS for individual user clearances on demand. These clearances are then evaluated for zero trust policy enforcement
Define program- and subject-specific information labelling for channels, Mitigate data spillage incidents, Set visibility time limits on messages to minimize risks to sensitive and classified data. Enable security safeguards such as FIPS 140-3 validation, STIG-hardened deployments, mobile biometric access, and post-quantum end-to-end encryption ensure compliance with federal standards while maintaining secure communication across devices and domains
These customizable per-channel banners ensure the classification or restrictions related to channel purpose are clearly visible to users at all times. This feature aligns with US government regulations that mandate proper notifications about sensitive, classified, or Controlled Unclassified Information (CUI) to ensure compliance and proper handling
Mattermost offers the most secure, most stringent end-to-end security in the industry for customers who require the highest level of protection for their communications. Mattermost end-to-end encryption protects to individual and group messages, and channels. System administrators control the availability and user access to the feature. End to end encryption is not available to all customers.
Data Spillage Handling enables any user to flag and report potential data leakage. Flagged content is immediately suppressed, and a designated security team is notified with context about the potential exposure, including a list of users who may have seen it. After a thorough security review, the post can be cleared or permanently deleted, ensuring sensitive information is managed swiftly and effectively.
Disappearing Messages allow Mattermost users to set visibility time limits on messages and posts, ensuring they are removed from endpoints after after a set time period. This feature minimizes risks to sensitive data, making it ideal for exchanging sensitive information such as one-time passwords or Social Security Numbers.
Mattermost enhances data transport security with Post-Quantum TLS, utilizing cryptographic algorithms designed to resist future quantum computing attacks. This ensures that data-in-transit remains secure against both current and future threats, aligning with the White House national security memorandum and providing robust protection for sensitive communications
Mattermost’s End-to-End Encryption with Post-Quantum Security ensures that sensitive communications remain secure both now and in the future. By integrating quantum-resistant cryptographic algorithms, this feature protects messages from unauthorized access, leveraging the only US NIST ESV-certified source of quantum entropy for maximum security. This robust encryption solution is designed to meet the highest standards of data protection, safeguarding critical information against current and emerging threats. Developed in partnership with Qrypt and utilizing the Qrypt BLAST protocol, post-quantum secure end to end security requires a separate license and is not available to all customers. (https://www.globenewswire.com/news-release/2025/05/08/3077645/0/en/Mattermost-and-Qrypt-Announce-Joint-Development-Program-for-Quantum-Secure-End-to-End-Encryption-Collaboration-Platform.html)
Channel Labels in Mattermost provide a flexible way to tag and organize channels, making it easier to sort and filter them based on specific criteria. This feature allows teams to customize labels for channels, enhancing clarity and improving the overall user experience by ensuring that relevant information is easily accessible
Security-Optimized Mobility features deliver advanced protection for BYOD environments without requiring MDM, including OS-level data-at-rest encryption, biometric authentication, jailbreak/root detection, and screenshot/recording prevention. These capabilities ensure secure mobile access to mission-critical workflows while maintaining full control over sensitive data, even in air-gapped or high-security environments.
Mattermost’s mobile biometrics feature ensures that only the authorized device owner can access the Mattermost application. By leveraging hardware-level security through native biometric authentication (such as Face ID or fingerprint recognition), this feature significantly enhances data security. Administrators can require biometric authentication each time a user attempts to access the app, adding an extra layer of protection for sensitive and classified information
Mattermost’s mobile data-at-rest encryption ensures that stored information remains secure even if the device is lost or stolen. The application for Apple iOS and Android devices uses the native OS security architecture to encrypt data-at-rest on mobile devices. Data stored by the Mattermost mobile app resides within the app’s private storage container, isolated by each platform’s rigorous sandboxing model. Users cannot disable this protection.
Mobile Screenshot Prevention ensures that sensitive information remains secure by blocking screenshots and screen recordings on the Mattermost mobile app. This feature helps protect classified data from being inadvertently or maliciously captured and shared.
Mobile Jailbreak / Root Detection ensures that only secure, uncompromised devices can access Mattermost by detecting and blocking jailbroken or rooted devices. This feature helps protect sensitive data by preventing access from devices that have been tampered with or are running non-standard operating systems
Allow PDF documents, videos and images to be viewed but not downloaded to the user’s device. This enables users to view work related materials but keeps sensitive or classified documents within the organization’s control at all times.
Mattermost is purpose-built to operate effectively in private, air-gapped, and DDIL (Disconnected, Denied, Intermittent, and Limited-bandwidth) environments, offering a secure, self-hosted collaboration platform that supports mission-critical operations even in the absence of internet connectivity. It provides sovereign, cyber-resilient deployment options—including Kubernetes-based orchestration, private container registries, and offline installation packages—ensuring full control over data, compliance with Zero Trust principles, and seamless integration with existing infrastructure such as LDAP, PostgreSQL, and Elasticsearch.
Mattermost is engineered for secure deployment in air-gapped and government cloud environments, including Amazon GovCloud Azure AGC,and Oracle AGC enabling mission-critical collaboration in disconnected or classified networks. With support for Kubernetes-based orchestration, private container registries, and offline installation packages, Mattermost ensures full operational sovereignty and seamless integration with infrastructure like Azure IL5 and Oracle AGC for U.S. federal and defense agencies
The Mattermost for Microsoft Teams App enables organizations to connect their users in Mattermost and in Teams. In disconnected, degraded, intermittent, or limited (DDIL) environments, this integration ensures your teams can continue secure collaboration and workflow execution independently—maintaining operational continuity, even if Teams is inaccessible
Mattermost enables local collaboration during outages or in DDIL environments, then automatically syncs all messages and updates across servers once connectivity is restored—ensuring no data is lost and operations stay aligned.
Designed for multi-national, distributed, and multi-domain operations, this feature set includes automatic channel translations, SIP/VOIP bridging, and secure cross-domain collaboration—ensuring secure, real-time communication across allied forces and partner organizations, even in disconnected or classified environments.
Break down language barriers with Automatic Channel Translations in Mattermost. This feature enables real-time multilingual collaboration by translating conversations so every participant can read and write in their preferred language—supporting seamless communication across global, multi-national, and mission partner environments.
Cross-Domain Collaboration enables NSA-approved secure communications and collaboration between air-gapped Mattermost servers. This feature allows teams to work together seamlessly across different organizational domains, ensuring that collaboration is efficient, secure, and compliant with stringent security standards.
Bridge secure collaboration with traditional voice systems using SIP/VOIP via Partner Integrations. This feature connects Mattermost Calls to conventional VOIP infrastructure, enabling seamless, secure communication across mission environments and remote locations—ensuring operational continuity even in hybrid or classified deployments.
Ultra-High Resilience capabilities ensure uninterrupted operations in mission-critical environments by supporting up to 200,000 concurrent users through a geo-distributed, high-availability architecture with dedicated write-through caching and zero-downtime upgrades. This enables real-time collaboration across disconnected or degraded networks, ensuring operational continuity even in air-gapped, DDIL, or mission partner environments.
Boost performance and reliability at scale with Dedicated Write-Through Caching powered by Redis. This feature ensures lightning-fast access to critical data while maintaining full data integrity—so your teams stay connected and mission-ready, even in the most demanding environments.
By leveraging a mesh of interconnected servers and Shared Channels, teams can collaborate in real time—even across disconnected or degraded networks—with automatic resynchronization and local autonomy that keeps operations running smoothly, no matter the conditions.
Speed real-world workflows with enterprise-grade mobility and security through EMM, MDM, and AppConfig integration, including ID-only push notifications and data protection measures that restrict transfer to underlying iOS and Android platforms.
Enhance mobile security by deploying with Enterprise Mobility Management (EMM) to secure mobile endpoints with management application configuration, and Mattermost AppConfig compatibility.
A full range of support options are available, including free forums and documentation to enterprise support with guaranteed SLAs, 24/7 coverage, and specialized expertise.
Community support for all Mattermost offerings is available on peer-to-peer forums. Organizations using Mattermost Free to evaluate a future purchase of Mattermost Enterprise can contact sales to apply for early access to commercial support as part of the evaluation process.
Professional Support includes business hours support from 8am to 8pm United States Pacific Time (UTC-8 except for U.S. daylight savings time), with next business day response time via email and the Mattermost online ticketing system. For more information, please see this.
Enterprise Support is available 24×7 at all times on all days via email and the Mattermost online ticketing system with a 4-hour response time service-level target. For more information, go here.
Available as an additional purchase for Mattermost Enterprise and Enterprise Advanced customers, Mattermost Premier Support offers additional license entitlements for non-production environments, direct access to senior support team members, screen-sharing and audio calling for P1 and P2 tickets, and access to a private channel with Mattermost technical staff. For more information, read this.
Available as an additional purchase for Mattermost Enterprise and Enterprise Advanced customers, this is Premier Support delivered by exclusively U.S. citizens. U.S. based customer information is strictly segregated. Escalation to other Mattermost staff anonymizes customer information and requires advance customer approval for exceptions.
* Scheduled to ship later in 2025
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