PreVeil vs Tau Mail

PreVeil provides end-to-end encrypted email and file sharing for defense and regulated industries. PreVeil Drive stores and shares encrypted files, with controls for viewing, editing, and commenting. Email works with Outlook, Gmail, Apple Mail, browsers, and mobile devices; Drive integrates with Windows File Explorer and Mac Finder, and is also available in a browser and iOS and Android apps. PreVeil says data is encrypted on users’ devices and only recipients can decrypt it. It replaces passwords with cryptographic keys and uses Approval Groups to distribute administrative trust among multiple approvers. The company says its platform is designed to support CMMC, NIST SP 800-171, ITAR, DFARS, HIPAA, the FTC Safeguards Rule, and CJIS requirements. Data subject to DFARS, CMMC, or ITAR is stored in AWS GovCloud in the U.S.; other data is stored in AWS Commercial Cloud. A free Basic plan includes 5 GB of encrypted storage. Paid plans include Individual at $25 a month, requiring annual payments, and Business at $30 a month per user, with monthly billing available.

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.