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Although the default account setup is free, the service is sustained by optional paid services. Proton Mail received initial funding through a crowdfunding campaign.
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The company also operates Proton VPN, Proton Drive and Proton Calendar. Proton Mail is run by Proton AG (formerly Proton Technologies), which is based in the Canton of Geneva. The service can be accessed through a webmail client, the Tor network, or dedicated iOS and Android apps.
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It uses client-side encryption to protect email content and user data before they are sent to Proton Mail servers, unlike other common email providers such as Gmail and. Proton Mail (previously written as ProtonMail) is an end-to-end encrypted email service founded in 2013 in Geneva, Switzerland.
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