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Mail-in-a-Box vs Stalwart

The same facts for both, read from GitHub every night, and the relation a person reviewed.

Mail-in-a-BoxStalwart
LanguagePythonRust
LicenceCC0-1.0None detected
Stars15k15k
Latestv77v0.16.25
Last push2026-09-262026-10-05
Release cadenceabout 116 days between releasesabout 7 days between releases
Active contributors4 commit authors on the default branch in the last 90 days6 commit authors on the default branch in the last 90 days
FlagsnoneNo licence detected

How they relate

  • Both replace Google Workspace. Alternatives to Google Workspace →

    PartialMail-in-a-BoxMail, contacts and calendars for your own domains on one Ubuntu server, without the office apps.

    PartialStalwartMail over JMAP, IMAP and SMTP, plus CalDAV and CardDAV, in one Rust server.