Messages that travel directly from your device to theirs, like two neurons firing. No servers holding your chats. No phone numbers. Nobody can look you up. No one in the middle.
No ads, no tracking, no investors, no data to sell — ever. Synapsis is built and kept alive by people like you. Every donation goes to development, security audits and app-store fees.
We detect your system and give you the right version. From a full desktop to a bare terminal — Synapsis adapts to what your device can do.
The strongest design available today — the protocol can't realistically be broken; your only weak point is an unlocked, stolen device, and even that is covered.
Hybrid encryption with the 2024 NIST standard. Messages captured today can't be opened tomorrow, even by quantum computers.
The newest messaging-security standard: forward secrecy and self-healing after any compromise, for chats and groups.
No company server stores your messages. Offline delivery uses your own personal mailbox, which only ever sees encrypted blobs.
Traffic goes over Tor, so not even your internet provider can see who you talk to.
Your username is just how you're shown — nobody can search it or add you with it. You add people only face-to-face or through one-time codes that die after one use.
Encrypted local storage behind a PIN, disappearing messages, and a core written in Rust.
There is no search bar for people. Trust starts in person.
Show a living QR code that changes every minute. One scan, one contact — then it expires.
Send a tiny one-time invite file through any channel. Only Synapsis can open it, and only once.
Bring two Android phones together. A one-use handshake links you — it can't be copied or replayed.
Every theme changes colors, sounds, fonts, emoticons and the nudge animation — but every button stays exactly where it is. Try them:
Windows, Linux, Android, Termux or a plain SSH terminal. macOS, iPhone and linking two devices to one account are coming.
Drag files in, record voice notes, share photos and animated stickers — on any device that can handle them.
Coming later: pair a LoRa/Meshtastic radio and keep texting with no internet at all.