nost

A privacy-first messaging app with end-to-end encryption, hybrid post-quantum encryption, secure voice calls, and Murmur—a public community for sharing short posts.

nost is a privacy-first communication app built for secure, simple, and reliable conversations.

Private messages and one-to-one voice calls are protected with end-to-end encryption (E2EE). Your conversations stay on your devices—not on our servers. Encrypted messages are temporarily stored only while awaiting delivery and are removed from the server after they have been delivered or read.

Key Features

• End-to-end encrypted one-to-one and group messaging • Hybrid post-quantum encryption (PQC) for enhanced long-term security • Secure end-to-end encrypted one-to-one voice calls • Murmur, a public community for sharing short posts and connecting with people around the world • On-device translation for Murmur posts and comments in supported languages • Photos, videos, voice messages, files, stickers, reactions, replies, and message forwarding • Sign in with Google, Sign in with Apple, or email • nost Mode – automatically deletes messages within 5 minutes after they have been viewed

Privacy First

nost is designed to minimize the amount of personal data stored on servers. Your private conversations remain on your devices, while encrypted messages exist on our servers only temporarily for delivery before being removed.

Privacy is not just a feature—it’s the foundation of nost.

Your conversations belong only to you.