Proton Mail vs Tau Mail

Proton Mail is an encrypted email service available on the web, Windows, macOS, Linux, iOS, and Android. Its free plan lists 1 GB of storage and one email address, although its FAQ says storage starts at 500 MB; the free tier is described as having the same security level as paid plans. The service uses end-to-end and zero-access encryption, with open-source apps and independent audits. It blocks email trackers and includes phishing and spam protection, password-protected messages, and link confirmation. Users can schedule, undo, or snooze emails and organize messages with folders, labels, and categories. Easy Switch imports email, calendars, and contacts from other providers. Paid plans support external email clients through IMAP and SMTP using Proton Mail Bridge. Mail Plus lists 15 GB of storage, 10 extra email addresses, and one custom domain. Paid subscriptions include a 30-day money-back guarantee, and the desktop app has a 14-day free trial. Paid plans display monthly billing; the listed starting price is 3.99 /user/mo.

Tau Mail is an email service with webmail and native Android and iOS apps. It says messages are encrypted on the device before leaving, with only the sender and recipient holding keys, and advertises zero tracking rather than inbox scanning for advertising profiles. On-device spam detection and priority sorting are described as working without uploading message content. Users can bring their own domain with full DNS control. Webmail uses the same login as the mobile apps and needs no installation. Mobile apps include inbox synchronization, calendar, and contacts. The service offers a free plan with 1 GB encrypted storage and one custom alias. Pro costs $8 a month and includes 50 GB encrypted storage, five custom domains, priority routing, and advanced filters. Business costs $16 a month with unlimited storage, a team admin console, audit trail exports, and dedicated support. Tau Mail is identified as a Tau Technology Group service.