YOo
Messages only the two of you can read.
YOo encrypts what you send on your phone and decrypts it on theirs. Nothing in between holds the keys — including our own servers.
What it does
Private and group messages. Photos, files and voice notes. Voice and video calls, one to one and in groups. Stickers. Your conversations stay in sync across your linked devices.
All of it is end-to-end encrypted, using the same open protocol as Signal and WhatsApp. We can see that an account received something. We cannot see what.
Four things to know before you rely on it
Most of what a messenger claims about privacy is hard to check. These are the parts where YOo protects you less than you might assume, said plainly rather than buried.
- You need WhatsApp to sign up. Your one-time code arrives as a WhatsApp message, so Meta learns that your number registered for YOo — and anyone who can read your WhatsApp could complete a registration for you.
- Checking who else uses YOo is not private. When your app asks whether a number is registered, our server sees that number. Signal solves this with sealed hardware enclaves. We have not built that yet.
- There is no backup and no recovery. There is no PIN. If you lose your phone, your message history is gone — we cannot restore it, because we never had it.
- Our servers record the address you connect from. We cannot read your messages, but we can see that a connection happened, and when.
The privacy policy sets all of this out in full — every company involved, what each one receives, and how long anything is kept.
Who runs it
YOo is operated by CREATIVE ADVANCED TECHNOLOGIES Co., a company registered in Dubai, on our own servers. It is free, and there is no advertising in it.
If something is wrong, or you need to report abuse, write to support@theyoo.app — we act on abuse reports within 24 hours. The support page has our full details.
YOo is not affiliated with, endorsed by, or operated by Signal Messenger LLC or the Signal Technology Foundation. It is a separate service built on their open-source software under the AGPLv3 licence. You can obtain the source code.