Bylock is a clean, modern messenger that keeps your conversations private by default. Create groups, invite people with a link, and chat — encrypted from end to end.
Simple to use, private by design — for friends, families, and teams.
Create your own group and add people with a shareable invite link. You decide who joins.
One-to-one chats only the two of you can read — no one else, not even us.
Every message is encrypted on your device. The server only ever sees unreadable ciphertext.
Run Bylock on your own server. Your data stays with you — no cloud, no third parties.
Encryption happens on your device — here's the simple version.
Your encryption key is derived from your password right in your browser. It never touches the network.
Each message is encrypted on your own device. Plain text never leaves your machine.
Bylock stores and delivers unreadable ciphertext. Only the recipient can open it.
Bylock is an independent communication app with a single goal: to make everyday messaging simpler, faster, and private by default — for ordinary people and ordinary conversations.
Bylock is not affiliated with, operated by, or connected to any government, state institution, political movement, or organization. It is also unrelated to any other application that may have carried a similar name in the past. Any such association is purely coincidental.
Bylock is built strictly for lawful, everyday communication. Because every message is end-to-end encrypted, not even we can read your conversations — our only role is to deliver them.
Only you and the people in your chat. Messages are end-to-end encrypted on your device, so the server only ever stores unreadable ciphertext.
No. Bylock is an independent project and has no connection to any other application that may have used a similar name in the past, nor to any government or organization.
Yes. Bylock is open source and can be self-hosted on your own server, so anyone can inspect exactly how it works.
On the server you choose to run it on. Bylock does not use third-party clouds, tracking, or ads, and it cannot access the content of your messages.