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Mail-Archiver vs Open Archiver: catalog facts
Mail-Archiver	Open Archiver
Free Free and open source under the GPL-3.0 licence.	Freemium Free to self-host; a paid Enterprise Edition adds extra features.
Web, Self-hosted	Web, Self-hosted
Supports IMAP, Microsoft 365 and personal Microsoft accounts Exports to mbox and zipped EML	Imports from Google Workspace, Microsoft 365, IMAP, PST and mbox Searches inside attachments as well as message text
Requires running a Docker setup Read-only API cannot modify the archive	Some features are reserved for the paid Enterprise Edition Aimed at organisations, so heavier than personal archivers
Self-hosted	Self-hosted
Open source	Open source
License: GPL-3.0	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.