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SPECIFICTION
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Tau Mail

taumail.org

From $8/mo Free plan WebiOSAndroid
Visit taumail.org
Spec score 7.6 #24 of 29 in Private Email Services

What it is

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.

Spec sheet

Purpose
Tau Mail is an email service that describes itself as keeping conversations private.Read 9 Oct 2026 · taumail.org
Mobile apps
The site describes native Android and iOS apps with inbox sync, calendar, and contacts.Read 9 Oct 2026 · taumail.org
Android notifications
The Android beta listing says it supports push notifications and syncs inbox, calendar, and contacts with webmail.Read 9 Oct 2026 · taumail.org
Business features
The Business plan lists unlimited storage, a team admin console, audit trail exports, and dedicated support.Read 9 Oct 2026 · taumail.org
Company name
The site footer identifies Tau Technology Group.Read 9 Oct 2026 · taumail.org
Custom domains
The site says users can bring their own domain with full DNS control.Read 9 Oct 2026 · taumail.org
Encryption
The site says messages are encrypted on your device before they leave and that only you and your recipient hold the keys.Read 9 Oct 2026 · taumail.org
iOS notifications
The iOS beta listing says remote push works while the app is open and full background push is available after APNs is configured.Read 9 Oct 2026 · taumail.org
Spam filtering
The service offers on-device spam detection and priority sorting without uploading message content, according to its site.Read 9 Oct 2026 · taumail.org
Tracking
Tau Mail says it does not scan inboxes to build advertising profiles and advertises zero tracking.Read 9 Oct 2026 · taumail.org
Webmail
Tau Mail offers webmail with the same login as its mobile apps and no installation required.Read 9 Oct 2026 · taumail.org

Plans and prices

Free Free 1 GB encrypted storage · Single custom alias · Standard spam filter · Community support Read 9 Oct 2026 · taumail.org
Pro $8 a month 50 GB encrypted storage · 5 custom domains · Priority routing · Advanced filters Read 9 Oct 2026 · taumail.org
Business $16 a month Unlimited storage · Team admin console · Audit trail exports · Dedicated support Read 9 Oct 2026 · taumail.org

Every Tau Mail plan and price →

Strong points and limits

Strong points

  • Messages are encrypted before leaving the device
  • Advertises zero tracking and no advertising-profile inbox scans
  • Supports custom domains with full DNS control
  • Includes webmail plus Android and iOS apps
  • Offers a free plan

Limits

  • Free plan includes only 1 GB storage
  • Free plan provides one custom alias
  • Full iOS background push requires APNs configuration
  • Business features require the $16.00 USD monthly plan

Who it suits

Tau Mail suits people seeking email with end-to-end encryption, private calendar access, and web or mobile availability. It may also fit users who need custom domains or business administration features.

Verdict

Tau Mail combines encrypted email, on-device filtering, custom domains, and calendar access across web and mobile apps. Its free tier provides a starting point, while larger storage, routing, filtering, and team controls require paid plans.

Where Specifiction places it

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