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Communication & Collaboration
The secure, high performance email server
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Cyrus IMAP
A free, open-source email, contacts and calendar server
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About Cyrus IMAP
Cyrus IMAP is a free, open-source server for email, contacts and calendars. It speaks IMAP, POP3, JMAP, CalDAV and CardDAV, with Sieve filtering, and is engineered for scalability, security and fast access to very large mailboxes. Developed since the 1990s at Carnegie Mellon and now by a community of contributors, Cyrus is typically paired with an SMTP server to form a complete mail system. It suits universities, ISPs and organizations running serious self-hosted email infrastructure.
Cyrus IMAP website preview
Live preview of cyrusimap.org via the WordPress mShots service — it can take a few seconds to generate on a first visit.
Cyrus IMAP: strengths & things to check
Strengths
- Completely free to use — this directory lists no paid plan for it.
- Covers email, imap, mail server, jmap — see the focus areas listed in its key facts.
- Has 6 close alternatives in the same category on this page, so switching or comparing is easy.
Things to check
- Free tools can change their model or shut down — avoid locking critical work into it without an export path.
- Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
- It is one of 565 tools in the Communication & Collaboration category here — compare it against the alternatives below before you commit.
Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.
Cyrus IMAP pricing
| Pricing model | Free — listed in this directory as a free tool, with no paid plan required to use it. |
|---|---|
| Free access | Yes — fully free |
| Current plan prices | Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale. |
| Official site | cyrusimap.org |
Cyrus IMAP key facts
- Category: Communication & Collaboration
- Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
- Focus areas: email, imap, mail server, jmap
- Official site: cyrusimap.org
Cyrus IMAP FAQ
How much does Cyrus IMAP cost?
Free — listed in this directory as a free tool, with no paid plan required to use it. Current plans and prices are listed on the official site (cyrusimap.org).
What is Cyrus IMAP used for?
A free, open-source email, contacts and calendar server Its focus areas in the Communication & Collaboration category: email, imap, mail server, jmap.
Where can I try Cyrus IMAP?
On its official site, cyrusimap.org — the Visit Official Site button above goes straight there.
Cyrus IMAP vs alternatives
| Cyrus IMAP | Dovecot | AfterLogic WebMail | chasquid | |
|---|---|---|---|---|
| Pricing | Free — listed in this directory as a free tool, with no paid plan required to use it. | Freemium — a free tier lets you start, and paid plans are available if you need more. | Freemium — a free tier lets you start, and paid plans are available if you need more. | Free — listed in this directory as a free tool, with no paid plan required to use it. |
| Focus areas | email, imap, mail server, jmap | email, imap, mail server, self hosted, open source | webmail, email, imap, interface | email, smtp, mail server, go |
| Official site | cyrusimap.org | dovecot.org | afterlogic.org | blitiri.com.ar |
| Directory status | Listed | Listed | Listed | Listed |
Side-by-side from each listing's own directory data. Full alternative cards are below.
About the Communication & Collaboration category
Chat, video meetings, and messaging apps that keep teams connected. The Communication & Collaboration category on Tools Hub currently lists 565 tools. Alongside Cyrus IMAP, it includes chasquid, Exim, Sendmail, mlmmj.
Alternatives to Cyrus IMAP
Tools in the same Communication & Collaboration category that share focus areas with Cyrus IMAP — worth comparing before you commit:
A
Communication & Collaboration
Webmail client for IMAP servers
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Communication & Collaboration
An SMTP server focused on simplicity, security and ease of operation
C
Communication & Collaboration
Integrated mail and groupware server based on open protocols
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Communication & Collaboration
Production mail server packaged with Docker
E
Communication & Collaboration
Lightweight SMTP store-and-forward mail server with POP access
More in Communication & Collaboration
Comparing tools in the Communication & Collaboration category? These related listings are worth a look: chasquid — An SMTP server focused on simplicity, security and ease of operation; Exim — The Exim Internet Mailer, a flexible message transfer agent; Sendmail — The classic open-source mail transfer agent, maintained by Proofpoint.
CCommunication & Collaboration
An SMTP server focused on simplicity, security and ease of operation
E
Communication & Collaboration
The Exim Internet Mailer, a flexible message transfer agent
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Communication & Collaboration
The classic open-source mail transfer agent, maintained by Proofpoint
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Communication & Collaboration
A simple mailing list manager: mailing list management made joyful
S
Communication & Collaboration
A GPG-enabled mailing list manager for encrypted group communication
R
Communication & Collaboration
Free and open-source webmail software with an application-like interface