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Head-to-head · Mail Server Software

Zimbra Collaboration vs Dovecot

  • Updated Nov 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Zimbra Collaboration #2 in Mail Server Software 9.1/10 Free plan Free plan✓ 0 of 5 features Visit Zimbra
Dovecot #6 in Mail Server Software 8.6/10 Free plan Free plan✓ 2 of 5 features Visit Dovecot

Zimbra Collaboration leads on 0 checks, Dovecot 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 scoreZimbra Collaboration · 9.1/10
  • Free planboth
  • Most featuresDovecot · 2 of 5

Zimbra Collaboration scores higher on our rubric for mail server software: 9.1 against 8.6 out of 10; our editors rank them #2 and #6.

Zimbra Collaboration is the better fit for full-featured open-source collaboration mail. Dovecot is the better fit for high-performance IMAP and POP3 backends.

  • Zimbra Collaboration fits best

    Full-featured open-source collaboration mail

  • Dovecot fits best

    High-performance IMAP and POP3 backends

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 Zimbra Collaboration 9.1/10 Visit ↗ Dovecot 8.6/10 Visit ↗
At a glance
Editor score 9.1 8.6
Ranking #2 in Mail Server Software #6 in Mail Server Software
Best for Full-featured open-source collaboration mail High-performance IMAP and POP3 backends
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted, Desktop, Mobile Self-hosted
Platforms Web, Windows, macOS, Linux, iOS, Android Linux
Support Email, Phone, Tickets, Community, Docs · 24/7 Community, Docs
Integrations 5 integrations 3 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Zimbra Collaboration 0/5 · Dovecot 2/5
Webmail interface Not checked yet Not checked yet
IMAP/POP3 access Not checked yet ✓ (best)
Mobile sync Not checked yet Not checked yet
Antispam tools Not checked yet Not checked yet
High availability Not checked yet ✓ (best)
Specs
License model Not checked yet Open-source
Mailbox limit Not checked yet Not checked yet
Our review
Pros
  • Combines email, calendars, contacts, tasks, and file sharing
  • Supports IMAP, POP, SMTP, CalDAV, CardDAV, and ActiveSync
  • Includes migration, security, backup, and restore capabilities
  • Free open-source Community Edition for self-hosted deployments
  • Supports IMAP, POP3, LMTP, and ManageSieve protocols
  • Indexing, caching, search, filtering, and plugin extensibility
Cons
  • Commercial licensing uses quote-based pricing
  • Hosted storage and attachment limits depend on the hosting provider
  • Its broad feature set may exceed basic email-only requirements
  • Focused on mailbox access rather than a complete mail stack
  • No verified webmail or antispam features
  • Commercial Dovecot Pro pricing is not published as a mailbox plan
Our verdict

Zimbra Collaboration is an open-source email and collaboration suite from Synacor for businesses, educational institutions, service providers, and organizations that need control over deployment and data. It combines email, contacts,…

Read the review →

Dovecot is an open-source email server centered on IMAP and POP3 mailbox access for Linux and UNIX-like systems. Its Community Edition is designed for single-server, self-hosted deployments, making it a strong fit for teams building or…

Read the review →
  1. Zimbra CollaborationMail Server Software 9.1Free plan
  2. DovecotMail Server Software 8.6Free plan

Strengths and trade-offs

  • Zimbra Collaboration — where it wins

    • Combines email, calendars, contacts, tasks, and file sharing
    • Supports IMAP, POP, SMTP, CalDAV, CardDAV, and ActiveSync
    • Includes migration, security, backup, and restore capabilities

    Where it doesn't

    • Commercial licensing uses quote-based pricing
    • Hosted storage and attachment limits depend on the hosting provider
    • Its broad feature set may exceed basic email-only requirements

  • Dovecot — where it wins

    • Free open-source Community Edition for self-hosted deployments
    • Supports IMAP, POP3, LMTP, and ManageSieve protocols
    • Indexing, caching, search, filtering, and plugin extensibility

    Where it doesn't

    • Focused on mailbox access rather than a complete mail stack
    • No verified webmail or antispam features
    • Commercial Dovecot Pro pricing is not published as a mailbox plan
  • Zimbra Collaboration9.1/10 · Free plan

    A broad open-source suite for organizations that need email, collaboration, and deployment control.

    Visit ZimbraFull verdict →
  • Dovecot8.6/10 · Free plan

    A focused, extensible mailbox backend for self-hosted Linux mail infrastructure.

    Visit DovecotFull verdict →

More comparisons

All mail server software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026

Last updated · How we research and update