Proton Mail is a leading software provider based in Switzerland. With its meta title "Proton Mail: Get a private, secure, and encrypted email account" and meta description "Proton Mail is the world’s largest secure email service with over 100 million users. Available on Web, iOS, Android, and desktop. Protected by Swiss privacy law.", it is evident that Proton Mail offers a highly secure and encrypted email account to its users. With over 100 million users, it is the largest secure email service globally. Proton Mail is accessible on various platforms including Web, iOS, Android, and desktop, ensuring convenience for its users. The software provider is based in Switzerland, benefiting from the strong privacy laws of the country.