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Bichon vs Mail Backup X: catalog facts
Bichon	Mail Backup X
Free Free and open source under the AGPL-3.0 licence.	Paid Free to try, with a paid licence to keep using it.
Web, Self-hosted	Windows, macOS
No external database required Unified full-text search across accounts	Supports many desktop clients and online mail services Archive viewer and format converter included
Only archives mail; it cannot send or reply IMAP is the main source for downloading mail	Proprietary and paid after the trial Developer details are not clear from the site
Downloadable app, Self-hosted	Downloadable app
Open source	Closed source
License: AGPL-3.0	License not stated
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 September 24, 2026

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