$60/yr Individual Verified on fastmail.com, Oct 17, 2026 2 alternatives
Replaces it Active Open source · AGPL-3.0 Linux Self-hostable
⚠Running a mail server needs a clean-IP VPS with port 25 open, deliverability is on you, and webmail is a separate install.
⇢Imports your data: move mail over IMAP with standard tools; contacts and calendars via vCard/ICS files
Self-host Runs on your own Linux server, with Docker files in the repo. Setup docs are on stalw.art.
Replaces it Active Open source · GPL-3.0 Linux Self-hostable
⚠Running a mail server needs a clean-IP VPS with port 25 open, and deliverability and spam filtering are on you.
⇢Imports your data: built-in IMAP sync jobs pull your mail over from Fastmail
Self-host Runs on your own Linux server, with Docker files in the repo. Setup docs are on mailcow.email.
At a glance
Free alternatives to Fastmail compared | Alternative | Verdict | License | Linux | AUR | Self-host | Stars |
|---|
| Stalwart | Replaces it | AGPL-3.0 open source | Yes | — | Yes | 15.1k★ |
| mailcow | Replaces it | GPL-3.0 open source | Yes | — | Yes | 13.6k★ |
Fastmail alternatives: questions
- Is there a free alternative to Fastmail?
- Yes. The 2 free alternatives are Stalwart (open source, AGPL-3.0) and mailcow (open source, GPL-3.0).
- How much does Fastmail cost?
- Fastmail's Individual plan costs $5 a month, which is $60 a year (monthly or yearly (24/36-month terms cheaper)). Source: the official pricing page at fastmail.com, checked Oct 17, 2026.
- Which Fastmail alternatives run on Linux?
- Stalwart (self-hosted server; web UI) and mailcow (self-hosted server; web UI).
- Can you self-host a Fastmail alternative?
- Yes. Stalwart and mailcow run on your own server.
- Are these Fastmail alternatives open source?
- Yes. All 2 use OSI-approved open-source licenses: Stalwart (AGPL-3.0) and mailcow (GPL-3.0).
Built or know a better alternative to Fastmail? Suggest it free, or get it featured on this page.