Founded in 2013 in Switzerland by Andy Yen. It offers end-to-end encryption and is under Switzerland's privacy laws. Proton AG also provides VPN, calendar, file storage, and password manager services.
Icon for ProtonMail

Key Info: ProtonMail





Open Source

Only frontend

Onion Site



Free Plan - 500MB, 1 address, no custom domain. Paid plans start from €5 and allow for additional features, custom domain, and increased message volume

Custom Domain

Yes (Plus Plan, €5.00/m)


Yes (Professional Plan, €8.00)

Mail Client Support

Yes, but through Bridge

Security Audit

Yes (2021, by Securitum)

Accepts Crypto

Yes (BTC only)

Personal Info Required

Email for One-time Verification

Mobile App

Yes (Android and iOS)

Active Development



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Reviews are posted on GitHub (using Discussions). The aim of which is to be as transparent as possible.
No user review will be deleted unless obviously spam or offensive. Note that we will display your GitHub name and picture (as well as profile age + follower account, to give creadibility to the review). You may still leave a review, even if you you're associated with the service, but you MUST disclouse your affiliation.

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