End-to-end encrypted chats and calls, disappearing messages, and a private AI you can actually call — with no phone number. Built for iPhone & iPad.
Coming soon to the App Store · iPhone & iPad
Encrypted on your device · not on our servers
A fresh key for every message
Every message is sealed on your device with Curve25519 and AES-256-GCM — and a brand-new ephemeral key each time, so no message rides on a single shared key. The server only ever sees scrambled ciphertext — never anything readable.
Per-message keys — a fresh ephemeral key for every single message.
25-digit safety numbers let you verify there's no one in the middle.
Encrypted end-to-end
A messenger that does more
Every chat is sealed on your device — and YoMatrix still does the things you actually want: it can translate a message as it lands, transcribe a voice note, make messages disappear, or hand off to a private AI you can call.
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One app, everything private.
Every feature lives in one private messenger — no phone number, no tracking. Tap any app to see what it does.
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Curve25519 key exchange → HKDF → AES-256-GCM authenticated encryption, all on your device.A fresh ephemeral key for every message — each message is sealed on its own, never under one long-lived key.Edit or unsend messages, react, reply, forward and star — across both 1:1 and group chats.25-digit safety numbers let you verify you're really talking to the right person.Group messages are delivered Signal-style — separately encrypted to each member, never to a shared group key sitting on a server.1:1 and group calls (up to 6 video / 10 voice), built on WebRTC with native CallKit.Group calls use an end-to-end-encrypted mesh, so media flows directly between devices.Share your screen, and minimize any call to a floating pill while you keep chatting.On restrictive networks a call may relay through an encrypted TURN server just to connect — the media stays end-to-end encrypted either way.Per-conversation disappearing timers: 30 seconds, 5 minutes, 1 hour, 24 hours or 7 days.View-once photos and videos delete themselves the moment they're closed.Timers run on your device — there's no readable copy left behind on any server.Your identity is a globally-unique @username — no phone number and no email required.Pair new contacts by scanning a QR code: nothing to look up, nothing to leak.Coming soon: move to a new phone with an encrypted QR device transfer.Blocking is symmetric — blocked contacts simply disappear from both sides.On-device per-message translation on iOS 18+ — the text never leaves your phone.An optional server translation engine covers 59 languages; it's clearly flagged and asks first, because it relays text to translate (outside end-to-end encryption).Voice notes and voicemail are transcribed to text — on your device by default.The app interface itself is localized into 59 languages.On-device translation and transcription keep the audio and text on your phone; the wider 59-language engine is server-based and clearly labelled.Chat with @assistant, or call it like a real contact — it answers over a normal, ringing voice call.Around 37 built-in tools: calendar, reminders, contacts, maps, web search, encrypted memory and more.Works keyless out of the box on our own AI fabric, or bring your own key for Claude, ChatGPT, Gemini, Grok or MiMo.Connect your Gmail and it can find, search and read your mail in plain language — read-only, tokens kept on your device.Pull it into a live call for a hand, then get an optional post-call summary (off by default).The core messenger is free. The AI assistant is freemium — a free daily allowance plus an optional Pro tier for unlimited use and voice calls.Ask @assistant to find, search and read your Gmail in plain language — read-only, with tokens kept on your device.Coming soon: a personal @yomatrix.app address that drops incoming mail into a dedicated in-app thread.Email is clearly labelled “not end-to-end encrypted,” because email itself never is.Helper bots for reminders, weather, unit & currency conversion, translation, dictionary, news and more — just message them.An open developer API at api.yomatrix.app: create a personal webhook link in seconds, or register an app for published integrations.Bot and API messages travel in a clearly-labelled “server-relayed, not end-to-end encrypted” lane, separate from your private chats.Your conversations with people stay fully end-to-end encrypted — only the bot and API lane is server-relayed.Post photo and video stories that expire after 1 hour, 24 hours, 3 days or 7 days.Story content is end-to-end encrypted; the server only ever sees the expiry metadata.See exactly who's viewed your story with a per-story “Seen by” list.Voice notes, sticker packs and Tenor GIFs right in the composer.Group polls (single or multi-choice), one-tap live location, and shareable contact cards.@mention anyone, let admins ping the whole group with @everyone, and catch up in a dedicated Mentions inbox.A notification service decrypts just enough to show you a message while everything else stays locked.VoIP push wakes the app for incoming calls even from a fully terminated state.Message contents are only ever decrypted on your device, never on the server.The server is a blind relay: it forwards opaque ciphertext and never holds your keys.Connections are protected with SHA-256 certificate pinning and signed requests.No ads, no data brokers, no message scanning — your conversations aren't the product.Like any messenger, the relay sees minimal routing metadata (who and when) to deliver messages — but never the contents of your messages or calls.PairYou and the people you talk to exchange public keys once, by username or QR — your private keys never leave your devices.@username or QRKeys stay on-deviceAgree a secretEach message derives a fresh shared secret with Curve25519 Diffie-Hellman and HKDF — a brand-new key every single time.Curve25519 + HKDFFresh key per messageSealThe message is encrypted with AES-256-GCM on your device, so the server only ever sees opaque ciphertext.AES-256-GCMServer sees ciphertext onlyVerifyCompare a 25-digit safety number to confirm there's no one in the middle — the shield turns green when it matches.25-digit safety numberCatches impersonationSet a timerChoose a disappearing timer for the conversation — anywhere from 30 seconds to 7 days.30s to 7 daysPer conversationSendYour message is end-to-end encrypted and delivered like any other — the timer travels with it.End-to-end encryptedTimer attachedReadThe countdown starts once it's read. View-once photos and videos open exactly once.Counts from first readView-once mediaVanishWhen the timer ends, both devices delete the message — and there's no readable copy left on any server.Deleted on both sidesNothing left behindAsk or callMessage @assistant like any contact, or place a voice call — it rings and answers like a real person.Text or voice callWorks keyless by defaultReasonIt thinks the request through on our self-hosted AI fabric — or on your own Claude / OpenAI key if you prefer.Self-hosted fabricOr bring your own keyActIt can use around 37 tools — calendar, reminders, contacts, maps, web search, encrypted memory and more.~37 built-in toolsEncrypted memorySummarizePull it into a live call for help, then get an optional post-call summary with action items (off by default).In-call helpOptional summary
Privacy you don't have to think about
Every feature is built so privacy is the default state — nothing to configure, nothing to trust us with. Tap any feature to see what it does.
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Conversations only you two can read
Every message and call is encrypted on your device with a fresh key — so there's no readable copy on any server for anyone, including us, to leak or hand over. Calls connect device-to-device whenever the network allows.
End-to-end encrypted messages, voice and video — with a fresh key for every message.
Group calls connect device-to-device whenever the network allows, so media flows straight between devices.
No ads, no data brokers, no message scanning — and no phone number to give up.
Runs on our own self-hosted servers, not a big-tech cloud, over certificate-pinned connections.
Frequently asked questions
Is YoMatrix really end-to-end encrypted?+
Yes. Messages and calls are encrypted on your device with Curve25519 and AES-256-GCM, and only the people in the conversation can decrypt them. Every message even uses a fresh ephemeral key, so each one is sealed on its own rather than under a single long-lived key.
Do you need my phone number?+
No. You sign up with a username or by scanning a QR code — there's no phone number to share and no need to upload your contacts.
How are calls kept private?+
Calls connect device-to-device wherever possible, so audio and video flow directly between phones rather than through a central server. On restrictive networks a call may relay through an encrypted server just to connect, but the media stays end-to-end encrypted the whole way.
What can the server actually see?+
The server is a blind relay — it forwards encrypted data it can't read. Like every messenger, it needs minimal routing metadata (who's talking to whom, and when) to deliver your messages, but it never sees the contents of your messages or calls, and your keys never leave your device.
How much does it cost?+
The messenger itself — chats, calls and all the features here — is free. The built-in AI assistant is freemium: a free daily allowance, plus an optional Pro tier for unlimited use and AI voice calls.
Which devices can I use it on?+
iPhone and iPad on iOS 17 or later — coming soon to the App Store. A macOS app is in the works.
Say it privately.
YoMatrix is a free, end-to-end encrypted messenger. Your conversations stay between you and the people in them.
Coming soon to the App Store for iPhone and iPad. A macOS app is on the way.
No phone number, no ads, no tracking — ever.
Coming soon to theApp Store
YoMatrix is coming soon. Leave your email and we'll tell you the moment it's available.
By signing up you agree to receive one launch email — nothing else. Never shared, deleted on request. Want news about our other products too? Use the contact page.
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End-to-end encryptedNo phone numberSelf-hosted, not big-tech cloud
Your messages and calls are encrypted on your device, so no one — including us — can read them. No ads, no trackers, no message scanning.
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