Cyrus IMAP vs iRedMail
A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Cyrus IMAP
Scalable IMAP and POP server for large deployments
VS
iRedMail
Free, full-featured mail server solution
| Feature | Cyrus IMAP | iRedMail |
|---|---|---|
| Category | Mail Servers | Mail Servers |
| License | BSD-3-Clause | GPL-3.0 |
| Language | C | Shell |
| Setup difficulty | Hard | Medium |
| Min. RAM | 1,024 MB | 4,096 MB |
| Deployment | bare-metal, source | bare-metal |
| GitHub stars | ★ 641 | ★ 1,835 |
| First released | 1994 | 2007 |
| Replaces | Microsoft Exchange | Microsoft Exchange, Google Workspace |
Why pick each one
Frequently asked questions
Is Cyrus IMAP or iRedMail better?
iRedMail is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Cyrus IMAP if its specific feature set fits your needs better.
Are Cyrus IMAP and iRedMail free and open-source?
Yes. Cyrus IMAP is licensed under BSD-3-Clause and iRedMail under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Cyrus IMAP and iRedMail with Docker?
Cyrus IMAP: check the project docs for container support. iRedMail: check the project docs for container support.