Mailfence vs Proton Mail Comparison

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Feature	Mailfence Visit →	Proton Mail Visit →
Overview
Rating	7.0	8.5
Pricing	$0.00/moFree $2.50/moBase (individual, annual) $3.50/moEntry (individual, annual) Show billing detailsHide billing details Free: $0 Base (individual, annual): $2.50/mo billed yearly Entry (individual, annual): $3.50/mo billed yearly	$4.99/moMail Plus (individual, annual) $12.99/moProton Unlimited (individual, annual) Show billing detailsHide billing details Mail Plus (individual, annual): $59.88/year at renewal ($47.88 first year with the introductory rate) Proton Unlimited (individual, annual): $155.88/year at renewal ($119.88 first year with the introductory rate)
Free tier	Limited free tier Show detailsHide details 1 GB total (500 MB email + 500 MB documents), no custom domain, Knowledge Base-only support.	Limited free tier Show detailsHide details 1 GB storage, 1 email address, 150 messages/day, 10 hide-my-email aliases, no custom domain
Established	1999	2014
Platforms	AndroidiOS	WindowsmacOSLinuxAndroidiOS
Privacy
Jurisdiction	Belgium Show detailsHide details ContactOffice Group sa, Avenue Franklin Roosevelt 47b, B-1050 Brussels, Belgium, company number BE 0466.241.584. Gag orders are not legally possible in Belgium — Mailfence's warrant canary states it has never received a US National Security Letter or FISA court order, and could disclose a valid Belgian court order to the affected user.	Switzerland Show detailsHide details Proton AG, Route de la Galaise 32, 1228 Plan-les-Ouates, Geneva. Since June 2024 the primary shareholder is the non-profit Proton Foundation, also based in Geneva. Proton Europe sàrl (Luxembourg) is the designated EU GDPR representative.
Independent security audit	None on record	Securitum 2021 Show audit detailsHide audit details Source-code security audit of the redesigned Proton Mail web client and Proton Calendar, prior to release
Source code	Closed source	Fully open source
Zero-access encryption	No	Yes
Intra-provider E2EE	No	Yes
External PGP	Native	Manual import
Past data breach	No	No
Telemetry	On unless you opt out	On unless you opt out
Features
Hosting	Cloud	Cloud
Custom domain support	Yes	Yes
Aliases	Unlimited	Unlimited
Anti-spam approach	Incoming and outgoing messages are automatically analysed by anti-spam, anti-virus and anti-abuse checking routines; the provider's own security-analysis documentation states this applies at the transport layer and that OpenPGP-encrypted message bodies are never visible to the server.	PhishGuard flags spoofing and phishing using sender authentication (SPF/DKIM/DMARC) and metadata such as headers, link URLs and attachment hashes, not message content, since encryption prevents Proton from reading it; a machine-learning model retrains on user feedback (marking spam/phishing or rescuing a message from spam).
Bundled services	CalendarsDocumentsGroups	CalendarDriveVPNPass