SaaS-friendly startups (Slack is easier), Microsoft 365 buyers (Teams is bundled), organizations without ops investment for self-hosting, buyers prioritizing the deepest third-party app surface (Slack still leads), or anyone wanting fast vendor product velocity.
Defense, intelligence, and heavily regulated buyers requiring fully self-hosted team chat on internal infrastructure or air-gapped environments. Particularly strong for US federal and allied military customers, government contractors, banks with strict on-prem requirements, and any organization where Slack Cloud or Teams Cloud is non-starter.
Why we say this
Editorial pulled these weaknesses from Mattermost’s product card in our Top 10 Team Chat Software for 2026:
- ! Self-hosting requires real ops investment for upgrades and HA
- ! SaaS Cloud offering thin; used mostly as trial path
- ! App integration directory narrower than Slack and Teams
- ! Day-to-day UX less polished than Slack
- ! Post-2022 product velocity has been steady rather than fast
- ! Migration off Mattermost (or to it) is non-trivial at scale
- ! Smaller vendor footprint; procurement pushback at largest enterprises
If Mattermost is wrong for you, consider these instead
Same Team Chat Software category, different best-fit buyer.
Best for
SaaS and tech companies, engineering-heavy organizations, and any team that needs the deepest third-party app and integration surface in the category. Particularly strong for organizations that have built workflows around Slack Connect, custom Slack apps, or developer-tool integrations (PagerDuty, Sentry, Linear, GitHub, Jira).
See full profile →Best for
Any organization already paying for Microsoft 365 E3, E5, or Business (the vast majority of enterprise buyers globally). Particularly strong for regulated and government buyers requiring FedRAMP High, GCC, or GCC High and for organizations deeply integrated with Outlook, SharePoint, and the rest of the Microsoft stack.
See full profile →Best for
Remote-first, writing-heavy, and globally distributed teams that explicitly want to escape always-on chat culture. Particularly strong for organizations with strong async-by-default philosophy (Doist itself, Automattic-style distributed teams, writing-heavy product organizations).
See full profile →Related editorial
Last updated 2026-05-10. Editorial verdict based on the published Top 10 Team Chat Software for 2026 ranking. Disagree? Tell us.