Zimbra
Open source from Free. Based in United States.
Last checked 22 October 2026
I don't star-rate self-hosted software, because the cost and privacy depend on where you run it.
Key facts
- Cheapest plan
- Open source
Free - Free plan
- Open-source edition; paid Network Edition
- Storage
- Not confirmed
- Your own domain
- ✓ Yes
- End-to-end encryption
- No
- Company based in
- United States
- Your data is kept in
- Your own server
- Founded
- Unknown
- Free trial
- Unknown
- Funded by advertising
- No
- Works in any mail app
- ✓ IMAP and SMTP
- Calendar and contacts
- ✓ Yes
- Aliases
- Yes
- Open-source apps
- ✓ Yes
- Sign up without ID
- No
- White label
- Unknown
- Reader offer
- None
Not rated: self-hosted software
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Reviews
Nothing yet
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These are other people's ratings, taken from each site on the date shown. They don't change my stars, which come only from the facts.
From members
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Features
Not checked yet
- Your own domain✓ Yes
- Works in any mail app (IMAP)✓ Yes
- Calendar and contacts✓ Yes
- Open source✓ Yes
- White label (resell as your own)Unknown Suggest an edit
- Two-step sign-inUnknown Suggest an edit
- PasskeysUnknown Suggest an edit
- PGP encryptionUnknown Suggest an edit
- Password-protected email to anyoneUnknown Suggest an edit
- Catch-all addressUnknown Suggest an edit
- Filters and rulesUnknown Suggest an edit
- Sieve filtersUnknown Suggest an edit
- Auto-replyUnknown Suggest an edit
- Scheduled sendUnknown Suggest an edit
- Undo sendUnknown Suggest an edit
- Import from another providerUnknown Suggest an edit
- Mobile appsUnknown Suggest an edit
- Desktop appUnknown Suggest an edit
- POP3Unknown Suggest an edit
- CalDAV and CardDAV syncUnknown Suggest an edit
- JMAPUnknown Suggest an edit
- Tor (onion) addressUnknown Suggest an edit
- Pay with cash or cryptoUnknown Suggest an edit
- Export all your mailUnknown Suggest an edit
- APIUnknown Suggest an edit
- AI featuresUnknown Suggest an edit
- Single sign-on (SSO)Unknown Suggest an edit
Policies and contacts
2 of 5 found
- Privacy policy
- Unknown Suggest an edit
- Acceptable use policy
- Unknown Suggest an edit
- Terms of service
- zimbra.com/legal-information/support-terms-conditions
- Report abuse
- Unknown Suggest an edit
Track record
Code and releases
- Their code
- Zimbra/zm-build ↗ 248 stars · last change 30 October 2026
From public sources, last read on 31 October 2026: incidents as the provider reports them. None of this changes my stars.
Company and servers
Founded, owner, servers, uptime and blocklists
- Founded
- 2005 (Wikidata)
- Domain first registered
- 2001 (zimbra.com)
- Website hosted in
- 🌐 Worldwide network (Fastly, Inc.)
Only the website. Where your mail is kept is under Your data is kept in. - Name servers run by
- NS1
- DNSSEC
- Not signed
- IPv6
- ✓ website
- Website certificate
- Let's Encrypt · TLS 1.3
- Home page answered in
- 133 ms · HTTPS with HSTS
My automatic checks last ran on 31 October 2026. Server countries come from their IP addresses, and big providers often run servers in many countries. Blocklists are the free lists that answer public look-ups.
Zimbra home page
Screenshot
News
Latest headlines
- Loading the latest news…
From Zimbra's own blog and social accounts, and from tech and security news sites. I show the headline and its first few lines, and link to the full story where it was published.
Price history
No price yet
I haven't confirmed a price yet.
Sources
1 source
Suggest an edit
Spotted something wrong, out of date or missing about Zimbra? Members can send me a correction, ideally with a link to the provider's own page. I check every one before anything changes.
Facts are checked against Zimbra's own pages and dated. Offer links are referral links: I may earn a commission, and it never changes the stars or the order. How I make money