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Mailvelope vs Mailfence: catalog facts
Mailvelope	Mailfence
Free Free and open source for personal use. Business products are paid.	Freemium A free account is available, with paid plans for more features.
Browser extension	Android, iOS, Web
Works inside existing webmail rather than requiring a desktop mail client Keys stay in the browser under your control	OpenPGP encryption and signing in the browser Standard IMAP, POP and SMTP access
Only supports a defined list of webmail sites Browser-based key storage is weaker than a dedicated client or smartcard	Hosted service only Advanced features sit on paid plans
Browser extension	Downloadable app, Web application, Hosted service
Open source	Closed source
License: AGPL-3.0	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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