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Head-to-head · Team Chat Apps

Microsoft Teams vs Mattermost

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Microsoft Teams #1 in Team Chat Apps 9.4/10 Free plan Free plan✓ 2 of 2 features Try Microsoft Teams
Mattermost #4 in Team Chat Apps 8.9/10 Free plan Free plan✓ 2 of 2 features Visit Mattermost

Microsoft Teams leads on 0 checks, Mattermost on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMicrosoft Teams · 9.4/10
  • Free planboth

Microsoft Teams scores higher on our rubric for team chat apps: 9.4 against 8.9 out of 10; our editors rank them #1 and #4.

Microsoft Teams is the better fit for organizations using Microsoft 365. Mattermost is the better fit for self-hosted technical teams.

  • Microsoft Teams fits best

    Organizations using Microsoft 365

  • Mattermost fits best

    Self-hosted technical teams

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Microsoft Teams 9.4/10 Visit ↗ Mattermost 8.9/10 Visit ↗
At a glance
Editor score 9.4 8.9
Ranking #1 in Team Chat Apps #4 in Team Chat Apps
Best for Organizations using Microsoft 365 Self-hosted technical teams
Pricing model Free plan + paid Free plan + paid
Starting price — —
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Desktop, Mobile Cloud, Self-hosted, Desktop, Mobile
Platforms Web, Windows, macOS, Linux, iOS, Android Web, Windows, macOS, Linux, iOS, Android
Support Phone, Docs, Community Email, Tickets, Community, Docs
Compliance SOC 2, ISO 27001, HIPAA, 2FA ISO 27001, GDPR
Integrations 250+ integrations 700+ integrations
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Microsoft Teams 2/2 · Mattermost 2/2
Channels ✓ ✓
Guest access ✓ ✓
Specs
Message history Unlimited Unlimited
Integrations Microsoft 365, SharePoint, OneDrive, Outlook, Exchange, Planner, Forms, Power BI, OneNote, Power Apps, Power Automate, LinkedIn GitHub, GitLab, Jira, Microsoft Teams, Microsoft 365, Outlook, ServiceNow, Zoom, Pexip, Splunk, Zapier
Supported platforms web, Windows, macOS, Linux, iOS, Android web, Windows, macOS, Linux, iOS, Android, API, self-hosted
Maximum members 25000 users Not checked yet
Our review
Pros
  • Free plan includes unlimited chat and group calling for 100 participants
  • Channels, meetings, recordings, workflows, guest access, and AI in one workspace
  • Works across web, desktop, mobile, Linux, and API environments
  • Self-hosting supports on-premises, private-cloud, and air-gapped deployments
  • Combines messaging, calls, boards, automation, APIs, and AI agents
  • Integrates with GitLab, GitHub, Jira, Jenkins, and Microsoft Teams
Cons
  • Paid plans and features vary by country, subscription, and license
  • Teams Premium requires an eligible Teams license
  • The 25,000-member limit applies per team, not an unlimited workspace
  • Entry limits message history to 10,000 messages
  • Paid Professional and Enterprise plans require sales contact
  • Advanced capabilities are concentrated in higher-tier plans
Our verdict

Microsoft Teams combines one-to-one and group chat, channels, audio and video calling, online meetings, webinars, file sharing, collaborative apps, and external collaboration. It is suited to organizations that want communication and…

Read the review →

Mattermost is an open-source collaboration platform for technical, operational, defense, and critical-infrastructure teams. It brings public and private channels, direct and group messaging, file sharing, threaded discussions, search,…

Read the review →
  1. Microsoft TeamsTeam Chat Apps 9.4Free plan
  2. MattermostTeam Chat Apps 8.9Free plan

Strengths and trade-offs

  • Microsoft Teams — where it wins

    • Free plan includes unlimited chat and group calling for 100 participants
    • Channels, meetings, recordings, workflows, guest access, and AI in one workspace
    • Works across web, desktop, mobile, Linux, and API environments

    Where it doesn't

    • Paid plans and features vary by country, subscription, and license
    • Teams Premium requires an eligible Teams license
    • The 25,000-member limit applies per team, not an unlimited workspace

  • Mattermost — where it wins

    • Self-hosting supports on-premises, private-cloud, and air-gapped deployments
    • Combines messaging, calls, boards, automation, APIs, and AI agents
    • Integrates with GitLab, GitHub, Jira, Jenkins, and Microsoft Teams

    Where it doesn't

    • Entry limits message history to 10,000 messages
    • Paid Professional and Enterprise plans require sales contact
    • Advanced capabilities are concentrated in higher-tier plans

More comparisons

All team chat apps comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update