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Head-to-head · Email Server Software

IceWarp vs Zimbra Collaboration

  • Updated Oct 2026
  • Both researched from official sources
  • 1 check side by side
Higher score IceWarp #4 in Email Server Software 8.8/10 30-day trial Free trial✓ 0 of 4 features Visit IceWarp
Zimbra Collaboration #5 in Email Server Software 8.7/10 Free plan Free plan✓ 0 of 4 features Visit Zimbra

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

Our verdict

  • Highest scoreIceWarp · 8.8/10
  • Free planonly Zimbra Collaboration
  • Free trialonly IceWarp

IceWarp scores higher on our rubric for email server software: 8.8 against 8.7 out of 10; our editors rank them #4 and #5.

Zimbra Collaboration offers free plan; IceWarp doesn't.

IceWarp is the better fit for teams wanting hosted email plus collaboration tools. Zimbra Collaboration is the better fit for organizations seeking self-hosted email and groupware.

  • IceWarp fits best

    Teams wanting hosted email plus collaboration tools

  • Zimbra Collaboration fits best

    Organizations seeking self-hosted email and groupware

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. How we rank.

Side by side

Feature IceWarp 8.8/10 Visit ↗ Zimbra Collaboration 8.7/10 Visit ↗
At a glance
Editor score 8.8 8.7
Ranking #4 in Email Server Software #5 in Email Server Software
Best for Teams wanting hosted email plus collaboration tools Organizations seeking self-hosted email and groupware
Pricing model Paid Free
Starting price — Free plan
Free plan — ✓ (best)
Free trial 30 days —
Deployment Cloud, Self-hosted Cloud, Self-hosted, Desktop, Mobile
Platforms Web, Windows, macOS, Linux, iOS, Android Web, Windows, macOS, Linux, iOS, Android
Support Email, Community, Docs Email, Phone, Tickets, Community, Docs · 24/7
Compliance ISO 27001, GDPR, HIPAA SSO/SAML, 2FA
Integrations 2 integrations 5 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features IceWarp 0/4 · Zimbra Collaboration 0/4
Mail transfer agent Not checked yet Not checked yet
Mailbox server Not checked yet Not checked yet
Integrated mail server Not checked yet Not checked yet
Directory integration Not checked yet Not checked yet
Specs
Deployment Not checked yet Not checked yet
Email protocols Not checked yet Not checked yet
Our review
Pros
  • Hosted email supports custom domains, IMAP, and POP3 access.
  • Includes calendar, mobile sync, chat, conferencing, and file collaboration.
  • Offers cloud or self-hosted deployment and Exchange migration tools.
  • Combines email, calendars, contacts, tasks, and file sharing
  • Supports IMAP, POP, SMTP, CalDAV, and CardDAV
  • Includes migration tools and backup and restore capabilities
Cons
  • No ongoing free plan; the Startup offer is a 30-day trial requiring a card.
  • Startup is listed at $35/month for a 10-user package.
  • Deployments starting from 500 users require a custom quote.
  • Commercial licensing uses quote-based pricing
  • Hosted storage and attachment limits depend on the provider
  • Deployment and administration span several environments
Our verdict

IceWarp combines business email with calendar and collaboration features for organizations that want hosted email on custom domains or prefer to run a server themselves. It suits small and mid-sized teams as well as larger deployments,…

Read the review →

Zimbra Collaboration brings email and groupware together for businesses, educational institutions, service providers, and other organizations that want control over deployment and data. It covers email, contacts, calendars, tasks, and file…

Read the review →
  1. IceWarpEmail Server Software 8.830-day trial
  2. Zimbra CollaborationEmail Server Software 8.7Free plan

Strengths and trade-offs

  • IceWarp — where it wins

    • Hosted email supports custom domains, IMAP, and POP3 access.
    • Includes calendar, mobile sync, chat, conferencing, and file collaboration.
    • Offers cloud or self-hosted deployment and Exchange migration tools.

    Where it doesn't

    • No ongoing free plan; the Startup offer is a 30-day trial requiring a card.
    • Startup is listed at $35/month for a 10-user package.
    • Deployments starting from 500 users require a custom quote.

  • Zimbra Collaboration — where it wins

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

    Where it doesn't

    • Commercial licensing uses quote-based pricing
    • Hosted storage and attachment limits depend on the provider
    • Deployment and administration span several environments
  • IceWarp8.8/10 · 30-day trial

    Hosted business email with calendars, mobile sync, and team collaboration features.

    Visit IceWarpFull verdict →
  • Zimbra Collaboration8.7/10 · Free plan

    A flexible email and groupware suite for organizations that want deployment control.

    Visit ZimbraFull verdict →

More comparisons

All email server software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update