Tau Mail
Tau Mail: A privacy-focused mail service with calendar sync, custom domains, and native mobile apps. Ranked #16 of 29 in Private Email Services by our editors (7.1/10); pricing: Free plan; best for users wanting encrypted mail with calendar sync.
At a glance
- Editor score7.1 / 10
- PricingFree plan
- Best forUsers wanting encrypted mail with calendar sync
- Free planYes
- Paid from$8/mo
- Encryption scopeEnd_to_end
- Facts checked20 Sep 2026
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
Our verdict on Tau Mail
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.
Your product? Our editors can test Tau Mail in depth and publish a review, labelled as paid · from $149/mo →
Tau Mail pricing
All 3 Tau Mail plans and prices →
Tau Mail fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $8/mo |
| Encryption scope | End_to_end |
| Custom domains | Yes |
| Mailbox storage | 50 GB |
| Email aliases | Not verified |
| IMAP support | Not verified |
| Private calendar | Yes |
| Legal jurisdiction | Not verified |
| Deployment | Cloud, Mobile |
| Platforms | Web, iOS, Android |
| Support | Community |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Pricing | Free plan (source) |
| Website | taumail.org |
| Facts checked | 20 Sep 2026 |
Alternatives to Tau Mail
- Proton MailA private email service with encryption, migration tools, and a permanent free plan.9.4
- Tuta MailA privacy-focused email service with strong encryption and limited third-party integration.9.2
- eclipso Mail EuropeA private email and productivity suite with free access and low-cost paid tiers.8.6
See all Tau Mail alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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