How AI describes Proton Mail

Proton Mail is a privacy-first, encrypted email service based in Switzerland that protects messages with end-to-end and zero-access encryption and blocks email trackers. It offers a free tier along with Personal and Business plans funded by subscribers, including features like calendar, cloud storage, custom domains, and other privacy tools in the broader Proton ecosystem. All Proton services are open source and independently audited, positioning Proton Mail as a privacy-focused alternative to traditional providers like Gmail or Outlook.