OSHI Mesh: Offline Messenger

Message and call with or without the internet. OSHI sends encrypted chats online—or device-to-device over Bluetooth & Wi-Fi mesh when you're off the grid.

Talk and text freely — anywhere, anytime, even when the internet is down.

OSHI is a free, private messenger with voice and video calls that work both online AND offline. No SIM card, no phone number, and no VPN required. When networks are blocked or shut down, OSHI keeps you connected.

— EVERYDAY MESSAGING, DONE RIGHT — • Fast 1:1 and group chats, voice messages, photos and files • Crystal-clear encrypted voice and video calls • Typing indicators, reactions, replies and read receipts • Fun real-time voice effects on calls • Works online like any messenger — and keeps working when it can't

— WORKS WITH NO INTERNET — • Bluetooth + Wi-Fi mesh lets you message and call people nearby with zero signal • Messages hop device-to-device through the OSHI network • Built-in offline maps and navigation for 42 countries

— BUILT FOR PRIVACY — • End-to-end encryption (Signal-protocol Double Ratchet, AES-256-GCM) on every message and call • No phone number, no email, no account — your identity is a key on your device • Relays only ever carry encrypted data — they can never read your messages or hear your calls • No ads, no trackers, and your data is never sold

— STAYS CONNECTED UNDER CENSORSHIP — • No VPN needed — OSHI routes around blocks on its own • Covert channels, including steganography, disguise traffic to slip past filtering • Designed to keep working through throttling and internet shutdowns

— MORE — • On-device AI assistant (Apple Intelligence) • Disappearing and view-once messages • 34 languages, dark mode • Open source — audit it on GitHub

Whether you just want a private place to chat and call, or you need to stay reachable when everything else is blocked, OSHI works.

Download OSHI and stay connected — online or off.

Support: https://oshi-messenger.com/support