Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · Secure Team Chat Software

Mattermost vs Threema

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score Mattermost #2 in Secure Team Chat Software 9.2/10 Free plan Free plan✓ 1 of 4 features Visit Mattermost
Threema #7 in Secure Team Chat Software 8.4/10 30-day trial Free trial✓ 0 of 4 features Visit Threema

Mattermost leads on 1 check, Threema on 0, and 1 is even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMattermost · 9.2/10
  • Free planonly Mattermost
  • Free trialonly Threema
  • Most featuresMattermost · 1 of 4

Mattermost scores higher on our rubric for secure team chat software: 9.2 against 8.4 out of 10; our editors rank them #2 and #7.

Mattermost offers free plan; Threema doesn't.

Mattermost is the better fit for technical teams needing workflows and integrations. Threema is the better fit for privacy-focused teams and small organizations.

  • Mattermost fits best

    Technical teams needing workflows and integrations

  • Threema fits best

    Privacy-focused teams and small organizations

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 Mattermost 9.2/10 Visit ↗ Threema 8.4/10 Visit ↗
At a glance
Editor score 9.2 8.4
Ranking #2 in Secure Team Chat Software #7 in Secure Team Chat Software
Best for Technical teams needing workflows and integrations Privacy-focused teams and small organizations
Pricing model Free plan + paid Paid
Starting price — $3/user/mo
Free plan ✓ (best) —
Free trial — 30 days
Deployment Cloud, Self-hosted, Desktop, Mobile Cloud, Desktop, Mobile
Platforms Web, Windows, macOS, Linux, iOS, Android Web, Windows, macOS, Linux, iOS, Android
Integrations 700+ integrations 3 integrations
Features Mattermost 1/4 · Threema 0/4
Guest access ✓ (best) Not checked yet
File sharing Not checked yet Not checked yet
Audit logs Not checked yet Not checked yet
SSO support Not checked yet Not checked yet
Specs
End-to-end encryption Not checked yet Not checked yet
Message retention Not checked yet Not checked yet
Mobile apps Not checked yet Not checked yet
Our review
Pros
  • Self-hosted deployment across web, desktop, mobile, API, and private environments
  • Workflow automation, Boards, calls, AI agents, and threaded discussions
  • Integrations with GitHub, Jira, GitLab, PagerDuty, Grafana, and Microsoft Teams
  • Default end-to-end encryption for messages and calls
  • Anonymous accounts without a phone number or email
  • Self-hosted OnPrem deployment with infrastructure control
Cons
  • Entry limits usage to 10,000 messages per month
  • The Professional plan has a 250-user maximum
  • Professional and Enterprise plans use contact-sales pricing
  • No free plan; Private starts at 6 one-time
  • Work plans require annual billing
  • Threema Safe excludes message and media history
Our verdict

Mattermost is an open-source collaboration platform for technical, operational, defense, and critical-infrastructure teams. It combines public and private channels, direct and group messaging, file sharing, link and media previews,…

Read the review →

Threema is an encrypted messaging application for individuals, companies, public authorities, and organizations. It combines end-to-end encrypted text and voice messaging with encrypted voice, video, and group calls. Users can create an…

Read the review →
  1. MattermostSecure Team Chat Software 9.2Free plan
  2. ThreemaSecure Team Chat Software 8.430-day trial

Strengths and trade-offs

  • Mattermost — where it wins

    • Self-hosted deployment across web, desktop, mobile, API, and private environments
    • Workflow automation, Boards, calls, AI agents, and threaded discussions
    • Integrations with GitHub, Jira, GitLab, PagerDuty, Grafana, and Microsoft Teams

    Where it doesn't

    • Entry limits usage to 10,000 messages per month
    • The Professional plan has a 250-user maximum
    • Professional and Enterprise plans use contact-sales pricing

  • Threema — where it wins

    • Default end-to-end encryption for messages and calls
    • Anonymous accounts without a phone number or email
    • Self-hosted OnPrem deployment with infrastructure control

    Where it doesn't

    • No free plan; Private starts at 6 one-time
    • Work plans require annual billing
    • Threema Safe excludes message and media history
  • Mattermost9.2/10 · Free plan

    A broad, open-source team chat platform for technical teams that need control and integrations.

    Visit MattermostFull verdict →
  • Threema8.4/10 · 30-day trial

    A privacy-focused chat platform with anonymous accounts, encrypted calls, and self-hosting options.

    Visit ThreemaFull verdict →

More comparisons

All secure team chat software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update