Private by Design. Secure by Default.
Blackthread is an end-to-end encrypted messenger with military-grade AES-256-GCM encryption for every message, call, and file you share.
Alex Turner
Encrypted
Built for people who value their privacy
Features
Everything you need. Nothing you don't.
AES-256-GCM Encryption
Every message encrypted before leaving your device. Zero plaintext on our servers.
Encrypted Video & Audio Calls
WebRTC calls wrapped in end-to-end encryption for total call privacy.
Group Chats with Invite Links
Invite members via time-limited secure tokens. Full control over access.
Disappearing / One-Time Media
Photos that vanish after a single view. No screenshots, no traces.
Multi-Photo Sharing
Send up to 10 photos in one encrypted batch with lossless quality.
AI Chat Assistant
Built-in AI with full conversation-level encryption. Smart and private.
Read Receipts & Typing Indicators
Know when messages land and are read. Real-time delivery status.
Dark / Light / System Themes
Designed for your comfort, day or night. Automatic theme switching.
Kill Switch
One tap to wipe all local data in an emergency. Instant protection.
Security
Built on zero trust. By design.
Zero-Access Architecture
Messages are encrypted on your device with AES-256-GCM. Our servers never see plaintext — not your messages, not your media, not your call content.
Active Devices
iPhone 15 Pro
San Francisco, CA
MacBook Pro
San Francisco, CA
Unknown Device
Kiev, UA
Kill Switch
Wipe all local data instantly
Secure Device Management
See every device logged into your account. Revoke access instantly. Blackthread's Kill Switch wipes all local data with one tap if your device is lost or seized.
Be the First to Experience True Privacy
Join our waitlist and get early access plus a founding member badge when we launch.
FAQ