Post-Quantum Secure Email, Private by Design
End-to-end encrypted email with zero-knowledge architecture. Your messages stay private, even from us.
Features
Built for privacy and security
Every feature is designed with your privacy in mind, using proven cryptographic standards.
End-to-End Encryption
Your emails are encrypted before they leave your device and can only be decrypted by the intended recipient.
Zero-Knowledge Architecture
We can't read your emails even if we wanted to. Your data is encrypted with keys only you control.
No Tracking
Block tracking pixels and prevent senders from knowing when, where, and how you read emails.
Alias Protection
Create secure email aliases to protect your identity and stop spam at the source.
Secria Sentinel
Plus & Pro PlansAdvanced breach monitoring service that proactively protects your email security with multi-source detection, smart risk assessment, and instant notifications about potential data breaches affecting your account.✓ No configuration required - works automatically for Plus and Pro users
Simple, transparent pricing
Choose the plan that works for you
Free
Perfect for getting started
$0/month
- 1 GB storage
- 2 email aliases
- End-to-end encryption
- 100 labels
Plus
For security enthusiasts
$4.99/month
- 15 GB storage
- Secria Sentinel
- 10 email aliases
- 3 email signatures
- Whitelist/blacklist
- 3 custom domains
Pro
For privacy professionals
$11.99/month
or $999 lifetime
- 50 GB storage
- Secria Sentinel
- 30 email aliases
- 10 email signatures
- Security analytics
- 10 custom domains
- Custom spam filters
All plans include end-to-end encryption, zero-knowledge architecture, and secure email delivery.
Post-quantum encryption and contact verification included with all plans.
Security
Zero trust post-quantum encryption
Zero-knowledge architecture with hybrid cryptographic protection using ML-KEM-1024 and defense-in-depth security model.
ML-KEM-1024 (Post-Quantum)
NIST-standardized post-quantum cryptography generating 1,568-byte ciphertexts, resistant to quantum computer attacks and "harvest now, decrypt later" threats.
Hybrid Key Exchange
Combines X25519 ECDH with ML-KEM-1024 using HKDF-SHA256 key derivation for maximum security, defense-in-depth, and future-proofing against all attack vectors.
Zero-Knowledge Architecture
All cryptographic operations occur in your browser using WebCrypto API. We cannot decrypt your messages - even under legal compulsion.
Perfect Forward Secrecy
Each email uses unique ephemeral keys with salt-based derivation. Compromising one message key doesn't affect your other communications.
Argon2id Authentication
Memory-hard password hashing with 65,536 KB (64MB) memory cost, 3 time iterations, preventing brute force attacks and rainbow table exploits.
Transport Layer Security
TLS 1.2+ with ECDHE cipher suites, DKIM email authentication, and STARTTLS/implicit TLS support across all SMTP ports.
Your communications are quantum-safe
Two-stage hybrid post-quantum encryption with zero-knowledge architecture
Symmetric encryption
Post-quantum primary
Defense in depth
Secure key expansion
Quantum-safe key agreement
Per-message ephemeral keys
64MB memory cost
Encrypted at rest
DKIM authenticated
Zero-Knowledge Guarantee: Your private keys never leave your device unencrypted. Even we cannot access your messages, providing complete privacy protection against any adversary.