Stalk

No servers, no accounts, no backdoors. Stalk adds RSA end-to-end encryption to any IM app you already use.

Have you ever wished your messages on WeChat or Telegram were truly private — readable only by you and the person you're talking to?

Stalk makes that possible, without asking you to switch apps or create new accounts.

How it works

You and your contact each get a personal lock and key. You keep your key secret; you share your lock with each other. When your contact writes you a message, they lock it with your lock. Only your key — stored only on your phone — can open it.

The whole thing takes two taps. Copy the locked message from any chat app, open Stalk, and it unlocks automatically. Write your reply, lock it, paste it back. Done.

Works with apps you already use

WeChat, Telegram, iMessage, WhatsApp, Line — Stalk work alongside all of them. Your friends don't need to download anything new. You just exchange locks once, and from then on your conversations are private.

No accounts. No servers. No catches.

Stalk doesn't know who you are. It doesn't have servers. It never sees your messages. Everything — your contacts, your keys, your message history — stays on your device and nowhere else.

Even if someone gets hold of your locked messages, they cannot read them. The lock can only be opened by the right key, and that key never leaves your phone.

Simple enough for anyone

You don't need to understand encryption to use Stalk. If you can copy and paste, you can have private conversations.