OSSHunt

Checked 2026-10-21

mailcow: dockerized

Open-source alternative · mapped from 4 paid tools. Fit is not feature parity.

Selected by OSSHunt

Facts

License
Paid-feature tier A
Self-host
Paid-feature limitsNone established

Tier A: GPLv3 orchestration and mailcow UI with an integrated mail/groupware stack. Reviewed documentation exposes administration, spam controls, SOGo and mailbox migration without an edition paywall; Servercow sells hosting and support rather than a separate gated software edition. Bundled components retain their own licenses. License source. Repository: mailcow/mailcow-dockerized. Self-host: server; hosted offer from the project: yes.

Replaces 4 paid tools

  • Fastmail BusinessEntry price USD 3 / seat / month

    Fit:

    Email/groupware scope only. Replaces custom-domain mailbox hosting, not the full office suite. Mailcow sync jobs copy messages from IMAP; calendars, contacts, permissions and client behavior need separate migration checks. Operator manages DNS, deliverability, backups and upgrades. Source-account IMAP/export access must be enabled (Zoho Free excludes IMAP); pilot mailbox, calendar and contact transfer separately.

    Sources: docs.mailcow.email, docs.mailcow.email, www.fastmail.com · checked 2026-10-21

    Full comparison: Fastmail Business vs mailcow: dockerized

  • Google WorkspaceEntry price USD 7 / seat / month

    Fit:

    Replaces custom-domain mailbox hosting, not the full office suite. Mailcow sync jobs copy messages from IMAP; calendars, contacts, permissions and client behavior need separate migration checks. Operator manages DNS, deliverability, backups and upgrades.

    Sources: docs.mailcow.email, docs.mailcow.email, workspace.google.com · checked 2026-10-21

    Full comparison: Google Workspace vs mailcow: dockerized

  • Microsoft 365Entry price USD 5.40 / seat / month

    Fit:

    Replaces custom-domain mailbox hosting, not the full office suite. Mailcow sync jobs copy messages from IMAP; calendars, contacts, permissions and client behavior need separate migration checks. Operator manages DNS, deliverability, backups and upgrades.

    Sources: docs.mailcow.email, docs.mailcow.email, www.microsoft.com · checked 2026-10-21

    Full comparison: Microsoft 365 vs mailcow: dockerized

  • Zoho MailEntry price Not established

    Fit:

    Email/groupware scope only. Replaces custom-domain mailbox hosting, not the full office suite. Mailcow sync jobs copy messages from IMAP; calendars, contacts, permissions and client behavior need separate migration checks. Operator manages DNS, deliverability, backups and upgrades. Source-account IMAP/export access must be enabled (Zoho Free excludes IMAP); pilot mailbox, calendar and contact transfer separately.

    Sources: docs.mailcow.email, docs.mailcow.email, www.zoho.com · checked 2026-10-21

    Full comparison: Zoho Mail vs mailcow: dockerized

Selected by OSSHunt

mailcow: dockerized is listed as an open-source alternative to Fastmail Business, Google Workspace, Microsoft 365 and Zoho Mail, with partial fit or better. Maintainers can show this in a README; the badge links back to this page.

OSSHunt: replaces 4 paid tools

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