Zimbra Collaboration vs Mail-in-a-Box

Zimbra Collaboration8.7Visit Mail-in-a-Box8.4Visit

Higher score Zimbra Collaboration #5 in Email Server Software 8.7/10 Free plan Free plan✓ 0 of 4 features Visit Zimbra

vs

Mail-in-a-Box #8 in Email Server Software 8.4/10 Free plan Free plan✓ 0 of 4 features Visit Mail-in-a-Box

• Zimbra Collaboration fits best

  Organizations seeking self-hosted email and groupware

• Mail-in-a-Box fits best

  Small teams self-hosting a complete mail setup

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Side by side

Feature	Zimbra Collaboration 8.7/10 Visit ↗	Mail-in-a-Box 8.4/10 Visit ↗
At a glance
Editor score	8.7	8.4
Ranking	#5 in Email Server Software	#8 in Email Server Software
Best for	Organizations seeking self-hosted email and groupware	Small teams self-hosting a complete mail setup
Pricing model	Free	Free
Starting price	Free plan	Free plan
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud, Self-hosted, Desktop, Mobile	Cloud, Self-hosted, Browser extension
Platforms	Web, Windows, macOS, Linux, iOS, Android	Web, Linux
Support	Email, Phone, Tickets, Community, Docs · 24/7	Community
Compliance	SSO/SAML, 2FA	2FA
Integrations	5 integrations	1 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Small business
Features Zimbra Collaboration 0/4 · Mail-in-a-Box 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	Combines email, calendars, contacts, tasks, and file sharing Supports IMAP, POP, SMTP, CalDAV, and CardDAV Includes migration tools and backup and restore capabilities	Bundles Roundcube webmail with IMAP and SMTP access. Automates TLS provisioning, mail DNS setup and system health checks. Control panel manages users, aliases, DNS and backups.
Cons	Commercial licensing uses quote-based pricing Hosted storage and attachment limits depend on the provider Deployment and administration span several environments	Requires a dedicated machine and ongoing server administration. Community is the listed support channel. Listed integration is limited to Amazon S3.
Our verdict	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 →	Mail-in-a-Box is free, open-source software for people and small teams who want to operate their own email service. It turns a fresh cloud machine running Ubuntu into a mail server, with Roundcube webmail, IMAP and SMTP access, and contact… Read the review →

Strengths and trade-offs

• 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

• Mail-in-a-Box — where it wins

  • Bundles Roundcube webmail with IMAP and SMTP access.
  • Automates TLS provisioning, mail DNS setup and system health checks.
  • Control panel manages users, aliases, DNS and backups.

  Where it doesn't

  • Requires a dedicated machine and ongoing server administration.
  • Community is the listed support channel.
  • Listed integration is limited to Amazon S3.

• Zimbra Collaboration8.7/10 · Free plan

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

  Visit ZimbraFull verdict →
• Mail-in-a-Box8.4/10 · Free plan

  A free, open-source mail server bundle for small teams ready to administer their own infrastructure.

  Visit Mail-in-a-BoxFull verdict →