Zimbra Collaboration

zimbra.com · checked 7 Oct 2026

#16 · Email Server Software #18 · Mail Server Software

Visit zimbra.com ↗ Alternatives Zimbra Collaboration vs poste.io

How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on Email Server Software6.0#16 of 33

Zimbra is an enterprise email and collaboration suite with email, calendar, contacts, tasks, and file sharing.

Pricing

ProfessionalEmail, contacts & calendar · sharing & delegation · basic chat · Outlook for Windows · mobile push · archiving and discoveryOn request
StandardEmail, contacts & calendar · sharing & delegation · basic chat · S/MIME and two-factor authenticationOn request

As zimbra.com lists them, checked 7 Oct 2026.

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: zimbra.com
Price: Free tier
Free trial: Yes
Administration: Multi-tenancy and delegated administration let administrators manage distinct organizations and assign granular admin roles.
Briefcase: Briefcase provides server-side file storage, access controls, version tracking, and sharing from email, chat, or calendar.
Chat: Basic Chat supports one-to-one conversations, while Advanced Chat adds file sharing, group chats, message search, and channels.
Clients: Zimbra supports modern browsers, Zimbra Desktop, Outlook through its connector, and mobile access through ActiveSync on iOS and Android.
Compliance: Zimbra says it can support GDPR and HIPAA, while compliance depends on how an organization configures and maintains the platform.
Deployment: Zimbra can be deployed on-premises, in a private cloud, or in regional data centers.
Integrations: Zimbra's third-party apps page names Slack, Zoom, Dropbox, Webex, Jitsi, and Microsoft Teams.
Licensing limit: The site says the core server is open-source and advanced capabilities such as high-availability clustering, encryption, and large-scale sync require a commercial license.
Office: Zimbra Office supports in-browser document, spreadsheet, and slide editing with real-time collaboration and common Office and open document formats.
Security: Listed security capabilities include two-factor authentication, S/MIME email signing and encryption, SAML single sign-on, and mobile device allow/block/quarantine controls.
Support: Standard support is business-hours only; Premier adds 24×7 support for Severity-1 issues.
Trial: Zimbra's 2025 Business Service Provider Program Guide describes a 60-day trial license for administrators and a web-client trial for end users.

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