Tau Mail review
A privacy-focused mail service with calendar sync, custom domains, and native mobile apps.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Tau Mail is a private email service for individuals, domain owners, and teams that want encrypted inbox storage with calendar and contact synchronization. It combines webmail access with native Android and iOS apps, on-device spam detection, priority sorting, custom-domain support, and no-ad inbox use. The Free plan supports basic personal communication with 1 GB of encrypted storage, one custom alias, a standard spam filter, and community support.
The pricing structure scales from personal use to managed business mail. Pro costs $8 per month and adds 50 GB of encrypted storage, five custom domains, priority routing, and advanced filters. Business costs $16 per month and adds unlimited storage, a team admin console, audit-trail exports, and dedicated support. Those tiers make the service relevant to users who need more storage, multiple domains, or administrative controls rather than just a private inbox. Calendar and contact synchronization is included as part of the service, while the available platform coverage spans web, iOS, and Android.
Tau Mail’s strongest fit is for users who value encrypted message storage and want email, calendar, and contacts in one service. Business teams also get administrative and audit features that support oversight across managed accounts. The main trade-off is the Free plan’s tighter limits on storage and aliases, while some of the more advanced routing, filtering, support, and administration features are reserved for paid plans. Choose Tau Mail if encrypted storage, custom domains, and calendar sync are central requirements; consider another option if you need a broader set of specialized integrations or a more generous free mailbox.
Tau Mail pros and cons
- Where it wins
- End-to-end encrypted inbox storage across personal and business plans
- Calendar and contact synchronization with web, iOS, and Android access
- Custom domains, team administration, and audit exports for business users
- Where it doesn't
- The Free plan includes only 1 GB of encrypted storage
- A single custom alias is included on the Free plan
- Dedicated support and audit-trail exports require the Business plan
Tau Mail fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update