Mail server · Vendor site 2026-10-04
Stalwart is an all-in-one mail and collaboration server written in Rust with JMAP, IMAP, POP3, SMTP, CalDAV, CardDAV, and WebDAV in a single platform. It bundles anti-spam filtering, clustering, encryption, and enterprise licensing while offering a free community edition for self-hosters.
Understand the total cost
Free
Free
Community edition is available for self-hosting; enterprise licensing uses per-mailbox subscriptions with a 30-day trial.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
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Yes. Stalwart Mail Server has an ongoing free plan. Community edition is available for self-hosting; enterprise licensing uses per-mailbox subscriptions with a 30-day trial.
Stalwart Mail Server is listed as free. No paid plan with a published price was found.
We could not confirm API access for Stalwart Mail Server.