![\"Mattermost](\"https:\/\/trueconf.com\/blog\/wp-content\/uploads\/2025\/11\/718_359_en-2025-11-19t154110.897-690x345.png\" "\\"\\"")
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Mattermost and Slack are both team messaging platforms built around channels, direct messages, threads and file sharing. The biggest difference is not the chat interface. It is how the platforms are deployed and managed.<\/p>\n
Slack is a cloud-based service operated by the vendor. Mattermost can be self-hosted, deployed in a private cloud or used as a managed service. That difference affects data control, administration, security architecture and total cost of ownership.<\/p>\n
For most organizations, the choice comes down to this:<\/p>\n
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| \n Criteria<\/strong><\/p>\n<\/th>\n Slack<\/strong><\/p>\n<\/th>\n Mattermost<\/strong><\/p>\n<\/th>\n<\/tr>\n<\/thead>\n\n Deployment<\/b><\/p>\n<\/td>\n Cloud-based<\/p>\n<\/td>\n Self-hosted, private cloud or managed cloud<\/p>\n<\/td>\n<\/tr>\n Open source<\/b><\/p>\n<\/td>\n No<\/p>\n<\/td>\n Open-source components and self-hosted editions<\/p>\n<\/td>\n<\/tr>\n Infrastructure management<\/b><\/p>\n<\/td>\n Handled by Slack<\/p>\n<\/td>\n Can be handled by the organization<\/p>\n<\/td>\n<\/tr>\n Channels and threads<\/b><\/p>\n<\/td>\n Yes<\/p>\n<\/td>\n Yes<\/p>\n<\/td>\n<\/tr>\n File sharing<\/b><\/p>\n<\/td>\n Yes<\/p>\n<\/td>\n Yes<\/p>\n<\/td>\n<\/tr>\n Calls<\/b><\/p>\n<\/td>\n Huddles<\/p>\n<\/td>\n Mattermost Calls<\/p>\n<\/td>\n<\/tr>\n Integrations<\/b><\/p>\n<\/td>\n Large ready-made ecosystem<\/p>\n<\/td>\n APIs, plugins, webhooks and technical integrations<\/p>\n<\/td>\n<\/tr>\n AI<\/b><\/p>\n<\/td>\n Built-in AI capabilities<\/p>\n<\/td>\n Private AI and custom model integrations<\/p>\n<\/td>\n<\/tr>\n Data control<\/b><\/p>\n<\/td>\n Data hosted in vendor infrastructure<\/p>\n<\/td>\n Can remain on customer-controlled infrastructure<\/p>\n<\/td>\n<\/tr>\n Isolated deployment<\/b><\/p>\n<\/td>\n No self-hosted option<\/p>\n<\/td>\n Supported in suitable deployments<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n The biggest architectural difference is simple: Slack is SaaS, while Mattermost gives organizations the option to operate the server environment themselves. That difference matters more than most feature-by-feature comparisons.<\/p>\n The two platforms overlap heavily in everyday messaging. Both support channels, direct messages, threads, file sharing, search, calls, integrations and administrative controls.<\/p>\n The difference becomes more important when you look at deployment, IT responsibility and extensibility. Slack reduces infrastructure work because the vendor operates the service. Mattermost gives the organization more control, but that also means more responsibility for deployment, monitoring, backups, upgrades and security.<\/p>\n This is why Mattermost often appears in technical, regulated and infrastructure-sensitive environments, while Slack is more commonly used as a general business collaboration service.<\/p>\n Slack is delivered as a vendor-operated cloud service. Organizations create a workspace and use the platform without deploying the underlying server infrastructure.<\/p>\n Mattermost can be installed on infrastructure controlled by the organization. Depending on the deployment model, it can run on-premises, in a private cloud or in isolated environments.<\/p>\n Area<\/strong><\/p>\n<\/th>\n Slack<\/strong><\/p>\n<\/th>\n Mattermost<\/strong><\/p>\n<\/th>\n<\/tr>\n<\/thead>\n\n Server deployment<\/b><\/p>\n<\/td>\n Not required<\/p>\n<\/td>\n Required for self-hosting<\/p>\n<\/td>\n<\/tr>\n Updates<\/b><\/p>\n<\/td>\n Managed by Slack<\/p>\n<\/td>\n Managed by the organization in self-hosted deployments<\/p>\n<\/td>\n<\/tr>\n Backups<\/b><\/p>\n<\/td>\n Part of vendor-operated service<\/p>\n<\/td>\n Organization controls backup strategy<\/p>\n<\/td>\n<\/tr>\n Infrastructure access<\/b><\/p>\n<\/td>\n Limited to vendor model<\/p>\n<\/td>\n Direct infrastructure control<\/p>\n<\/td>\n<\/tr>\n Data location<\/b><\/p>\n<\/td>\n Depends on vendor deployment options<\/p>\n<\/td>\n Can be determined by the organization<\/p>\n<\/td>\n<\/tr>\n Isolated network<\/b><\/p>\n<\/td>\n No self-hosted edition<\/p>\n<\/td>\n Possible in suitable deployments<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Self-hosting is not automatically better. It gives the organization more control, but also creates more operational work.<\/p>\n For day-to-day messaging, Slack and Mattermost are structurally similar. Both organize communication around channels, direct messages and threads. Both also support file sharing, search and team discussions.<\/p>\n Slack is designed for broad business use. Channels can be created for teams, projects, topics or customers. Threads keep discussions organized, while huddles add lightweight voice and video communication.<\/p>\n Its main strength is the surrounding ecosystem. Messaging is closely connected with apps, workflows and other business tools.<\/p>\n Mattermost also uses channels, direct messages and threads. The platform is more strongly associated with technical and operational workflows. It combines messaging with APIs, plugins and workflow-oriented tools that can be adapted to internal systems.<\/p>\n The bigger distinction is that the organization can host the platform itself.<\/p>\n AI is becoming a more important part of team messaging platforms.<\/p>\n Slack increasingly combines messaging with AI-assisted search, summaries, workflow automation and contextual assistance.<\/p>\n Mattermost takes a more infrastructure-oriented approach. Organizations can connect AI capabilities to internal workflows and, depending on the deployment, use privately controlled models or services.<\/p>\n In short:<\/strong> Slack focuses on integrated AI inside a managed cloud platform. Mattermost gives organizations more control over how AI is connected to the communication environment.<\/p>\n<\/div>\n Slack has a large ecosystem of ready-made integrations. This is useful when a company already relies on cloud applications for project management, development, calendars, CRM or document collaboration.<\/p>\n Mattermost has a smaller ready-made ecosystem, but gives technical teams more flexibility to build or host their own integrations.<\/p>\n The practical distinction is straightforward. Slack is stronger when a company wants many integrations that work with minimal setup. Mattermost becomes more interesting when integrations need to connect with internal or privately hosted systems.<\/p>\n Both platforms provide enterprise security features, but their security models differ.<\/p>\n Slack operates the infrastructure. The organization configures security, access and governance inside the vendor-managed platform. This reduces the amount of infrastructure work required from internal IT.<\/p>\n Mattermost can be deployed on infrastructure controlled by the customer. That gives the organization more influence over server location, network access, logs, storage and administrative policies.<\/p>\n The tradeoff is responsibility. The organization also needs to manage patching, backups, monitoring, hardening, capacity and recovery.<\/p>\n So the security difference is not simply that one platform is more secure than the other. It is about who controls and operates the infrastructure.<\/p>\n Slack is proprietary software.<\/p>\n Mattermost includes open-source components and provides self-hosted deployment options. This matters most for organizations that need greater control over the application environment, custom plugins or server-side extensions, integration with internal systems, private infrastructure or more visibility into how the platform is built.<\/p>\n Open source does not automatically make deployment easier. In practice, it often provides more flexibility while also increasing the amount of technical work required.<\/p>\n The user-facing experience is similar enough that people familiar with channel-based messaging can usually adapt to either platform. The bigger difference is administrative.<\/p>\n Area<\/strong><\/p>\n<\/th>\n Slack<\/strong><\/p>\n<\/th>\n Mattermost<\/strong><\/p>\n<\/th>\n<\/tr>\n<\/thead>\n\n Initial deployment<\/b><\/p>\n<\/td>\n Quick workspace setup<\/p>\n<\/td>\n Server deployment may be required<\/p>\n<\/td>\n<\/tr>\n Infrastructure<\/b><\/p>\n<\/td>\n Vendor-managed<\/p>\n<\/td>\n Customer-managed for self-hosting<\/p>\n<\/td>\n<\/tr>\n Updates<\/b><\/p>\n<\/td>\n Vendor-managed<\/p>\n<\/td>\n Administrator-controlled<\/p>\n<\/td>\n<\/tr>\n Customization<\/b><\/p>\n<\/td>\n Apps, workflows and workspace settings<\/p>\n<\/td>\n Plugins, APIs and server customization<\/p>\n<\/td>\n<\/tr>\n Admin workload<\/b><\/p>\n<\/td>\n Lower<\/p>\n<\/td>\n Higher in self-hosted environments<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Slack reduces the amount of infrastructure work required from internal IT. Mattermost gives administrators more control over the platform itself. That tradeoff should be part of the product decision from the beginning.<\/p>\n A simple monthly price comparison is not enough. Slack and Mattermost have different cost structures because they use different deployment models.<\/p>\n Cost factor<\/strong><\/p>\n<\/th>\n Slack<\/strong><\/p>\n<\/th>\n Mattermost<\/strong><\/p>\n<\/th>\n<\/tr>\n<\/thead>\n\n Software<\/b><\/p>\n<\/td>\n Subscription-based<\/p>\n<\/td>\n Free and paid options depending on edition<\/p>\n<\/td>\n<\/tr>\n Server infrastructure<\/b><\/p>\n<\/td>\n Included in service<\/p>\n<\/td>\n Required for self-hosting<\/p>\n<\/td>\n<\/tr>\n IT administration<\/b><\/p>\n<\/td>\n Lower<\/p>\n<\/td>\n Higher<\/p>\n<\/td>\n<\/tr>\n Updates and maintenance<\/b><\/p>\n<\/td>\n Vendor-managed<\/p>\n<\/td>\n Organization-managed<\/p>\n<\/td>\n<\/tr>\n Scaling cost<\/b><\/p>\n<\/td>\n Mainly tied to users and plans<\/p>\n<\/td>\n Depends on licenses and infrastructure<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n For this reason, total cost of ownership is more useful than comparing only the advertised monthly price.<\/p>\n Migration matters because Mattermost is often considered by organizations already using Slack.<\/p>\n The technical migration may include users, channels, direct messages, message history, threads, files and permissions. But moving the data is only part of the work.<\/p>\n A company may also need to recreate integrations, bots, workflows, external collaboration processes, notification rules and application connections. For larger organizations, the integration layer may require more work than the chat migration itself.<\/p>\n Slack fits organizations that want a cloud-based communication platform with minimal deployment work and a large integration ecosystem. It is especially practical when teams already use many SaaS applications.<\/p>\n Both platforms can work well. Slack offers a large collection of existing integrations. Mattermost becomes more interesting when development tools and internal systems are hosted inside the organization’s own infrastructure.<\/p>\n Organizations comfortable with vendor-managed cloud infrastructure may choose Slack. Organizations that need direct control over servers, data location or network access may prefer a self-hosted platform such as Mattermost.<\/p>\n Slack does not offer a self-hosted server. Mattermost can be used in environments where communication infrastructure needs to remain under organizational control.<\/p>\n Slack generally requires less infrastructure work. Mattermost can still make sense for a small technical team if self-hosting is an explicit requirement and the team already has the resources to maintain the server.<\/p>\n Slack and Mattermost are primarily team messaging platforms. Some organizations need the same environment to handle not only messaging, but also larger video meetings, calling and interoperability with existing communication systems.<\/p>\n |
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![\"Slack](\"https:\/\/trueconf.com\/blog\/wp-content\/uploads\/2025\/11\/image-377-690x342.png\" "\\"\\"")
<\/p>\n![\"Mattermost](\"https:\/\/trueconf.com\/blog\/wp-content\/uploads\/2025\/11\/image-378-651x470.png\" "\\"\\"")
<\/p>\n![\"Mattermost](\"https:\/\/trueconf.com\/blog\/wp-content\/uploads\/2025\/11\/image-379-690x183.png\" "\\"\\"")
<\/p>\n![\"Mattermost](\"https:\/\/trueconf.com\/blog\/wp-content\/uploads\/2025\/11\/synchronous-and-asynchronous-communication-6.svg\" "\\"\\"")
<\/p>\n![\"Slack](\"https:\/\/trueconf.com\/blog\/wp-content\/uploads\/2025\/11\/image-380-690x186.png\" "\\"\\"")
![\"Mattermost](\"https:\/\/trueconf.com\/blog\/wp-content\/uploads\/2025\/11\/image-381-690x132.png\" "\\"\\"")
<\/p>\n![\"TrueConf](\"https:\/\/trueconf.com\/blog\/wp-content\/uploads\/2025\/11\/compatibility-en-1.svg\" "\\"\\"")
<\/p>\n![\"Kudremukh](\"https:\/\/trueconf.com\/blog\/wp-content\/uploads\/2025\/03\/image_2024.05.17_13-54-13.webp\" "\\"Kudremukh")
\n<\/div>\n<\/div>\n<\/div>\n![\"TrueConf](\"https:\/\/trueconf.com\/blog\/wp-content\/uploads\/2025\/11\/image-382-668x470.png\" "\\"\\"")
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