OSHI is a free, open-source Swiss-developed messenger for iOS that works without internet connection via mesh networking. Send encrypted messages peer-to-peer, bypass internet censorship with 6 steganographic covert channels, and communicate privately with no phone number required.
Every OSHI device is a node. Messages hop peer-to-peer over Bluetooth and WiFi Direct — relaying around blackouts, borders, and broken infrastructure. Privacy that travels with you, anywhere on Earth.
Your message never touches any server in plaintext. Your device is the origin, your device is the destination — nothing in between can read it.
Signal Protocol's Double Ratchet seals each message with a fresh AES-256-GCM key. Every message gets its own one-time lock.
Mesh first (no internet needed), IPFS next (decentralized), Tor last (maximum anonymity). OSHI picks whichever works.
Under surveillance? Six steganographic channels hide your traffic inside normal web requests, DNS queries, and images.
Only your recipient's device holds the matching key. They decrypt locally. The network never learns who talks to whom.
Disappearing timers, forward secrecy, and no metadata on servers. When a conversation ends, so does its trace.
Offline maps, AI assistant, image viewer, and Android APK — OSHI keeps growing while staying private.
Download entire regions for fully offline navigation. Search streets, find POIs (restaurants, pharmacies, gas stations, hospitals), and plan itineraries — all without internet.
NEWOffline directions for walking, driving, and cycling. Like Organic Maps, built right into your secure messenger — no third-party tracking.
NEWPowered by Apple Intelligence (iOS 26+). Ask questions, get summaries, draft messages — entirely on-device. Your data never leaves your phone.
iOS 26+Find restaurants, pharmacies, gas stations, hospitals, and more — directly on the offline map. No internet, no tracking, instant results.
NEWTap any image in group chats to view fullscreen with pinch-to-zoom. Swipe to browse all shared photos in the conversation.
NEWOSHI is now available as a direct APK download for Android. No Play Store required — sideload and start messaging privately.
ANDROID12 privacy features including offline maps, on-device AI, covert steganography, and mesh networking — all designed with your security as the top priority
AES-256-GCM authenticated encryption with the Double Ratchet protocol. Only you and your recipient can read messages.
Connect directly with nearby devices via Bluetooth and WiFi. No internet required for local communication.
Crystal-clear voice calls with real-time encryption. Add voice effects for extra privacy and fun.
We don't collect who you talk to, when, or how often. Your social graph stays completely private.
Set messages to auto-delete after reading. Leave no trace of sensitive conversations.
No central servers. Messages route through IPFS and Tor networks for maximum resilience.
Smart corrections, translations, tone reformulation, and AI assistant — all 100% offline using Apple Foundation Models.
Create Telegram-like bots with Python. Automate messages in channels and groups with a simple API.
6 advanced steganographic covert channels. Hide messages in web traffic, images, DNS queries, and text. Bypass censorship in restrictive networks.
Download regions for offline use. Turn-by-turn navigation for walking, driving, cycling. Search streets and POIs — no internet needed.
View images fullscreen with pinch-to-zoom in group chats. Swipe to browse all shared photos in the conversation.
Direct APK download available. No Play Store required — sideload OSHI on any Android device for private messaging.
Powerful language AI that runs 100% on your device. No data ever leaves your phone.
AI-powered spelling and grammar correction in any language. Context-aware, not just dictionary lookup.
Rewrite your message in 6 tones: Formal, Casual, Friendly, Professional, Playful, Persuasive.
Translate messages to 16+ languages. Translate received messages with one tap.
Ask questions directly in the chat. Get instant answers without leaving the conversation.
Messages automatically route through the best available path
Direct device-to-device communication
Decentralized storage network
Maximum anonymity
When networks are restricted, OSHI finds a way. 6 independent covert channels disguise your messages as normal web traffic.
Data encoded as Google Analytics cookies, ETags, and tracking headers. Indistinguishable from normal browsing.
Payload hidden in DNS subdomain queries. Works even when HTTP traffic is heavily monitored.
TLS shows allowed CDN domain, but HTTP routes to relay. Network sees cloudfront.net — we reach our server.
5 strategies: Google search, analytics beacons, form submissions, API calls, and image requests. DPI sees normal browsing.
Advanced image embedding that hides encrypted data in photo textures. Statistically undetectable — images look completely normal to the human eye and analysis tools.
Zero-width Unicode, homoglyph substitution, and whitespace encoding. Messages hidden inside normal-looking text.
Built in Switzerland under strict Swiss privacy law, OSHI uses the same encryption protocols trusted by security experts worldwide. Your data is protected at every step.
OSHI's covert communication features are designed to protect freedom of expression and personal safety in regions where basic human rights are at risk. These tools are intended for journalists, human rights activists, political dissidents, and civilians in conflict zones.
The use of covert channels is subject to the laws of your jurisdiction. Users are solely responsible for ensuring compliance with local regulations.
Learn more about what makes OSHI the most complete private messenger
Send encrypted messages without internet via Bluetooth and WiFi Direct. Works offline, no cell service needed.
Read full guide →6 advanced channels that hide your messages in normal traffic. Bypass censorship and deep packet inspection.
Read full guide →Translation, smart replies, and AI assistant powered by Apple Foundation Models. 100% offline, zero cloud data.
Read full guide →Join thousands of users who trust OSHI for their private communications.