ByLock is back — rebuilt from scratch with modern end-to-end encryption, zero message logs, and the same simple app you remember.
Everything you need to talk privately. Nothing you don't.
Messages are encrypted on your device and can only be read by the person you send them to. Not even we can see them.
Set a timer on any conversation and messages disappear automatically from every device once it runs out.
Sign up with just a username and password. No SIM card, no address book upload, no email required.
Private groups for family, friends and teams — with the same encryption as one-to-one chats.
Send photos, voice notes and documents up to 100 MB, encrypted end-to-end like everything else.
Our client code is public and independently audited, so you don't have to take our word for it.
The original ByLock went offline in 2016. It was simple: a username, a password, and a blue screen that just worked. We missed that.
So we started over. New team, new code, new servers — built around modern, well-reviewed cryptography and a strict no-logs policy. Same name, same spirit, a lot more care.
“We wanted a messenger that's as easy as it was in 2014, with the security people expect today.” — The ByLock team
Up and running in under a minute.
Grab ByLock for iPhone or Android. It's free.
Choose a username and a strong password. That's your whole account.
Add friends by username and start talking — privately.
Free for people. Fair for teams.
A small, independent team that cares a lot about privacy.
Believes great security should be invisible.
Join the waitlist for the private beta. We'll send one email when it's your turn — no spam, ever.
Questions, press, partnerships or a security report — we'd love to hear from you.
Found a vulnerability? Please report it privately.
[email protected]CAAF 4FA2 EF57 2E00 EA05
6994 71FB 45D0 B0C1 D624
We usually reply within one business day.