PolymorphNo phone number
No phone number
A messenger without a phone number or email.
Polymorph is a private, end-to-end encrypted messenger you sign up for with a handle you choose. It's free. We don't ask for a phone number, an email address or your real name, and we don't need your address book.
How signing up works.
- Choose a handle, like @sam. It's public, so people can find you, and you can change it once a month.
- Save your user key and secret key, in your password manager or as an image. They're shown only once.
- Create the account. That's all we need.
Your two keys are your account. Nobody can reset or recover them, including us: we never hold a copy of your secret key. Keep them somewhere safe.
You use the keys to log in on a new device or after you sign out, or you approve the new device from one you're already logged in on. Any device can be your first: iPhone, Android, Mac, Windows or Linux. You don't need a phone to use Polymorph on a computer.
People who find your handle send a request first. Nobody can message you until you accept.
Why it matters.
A number follows you
A phone number often stays with you for years and is usually tied to your name through your mobile contract. As a messenger account, it links your chats to the rest of your life.
Less to lose
Your account has no phone number or email address, so there is none for us to lose in a breach or to pass on.
You decide who sees what
Give people your handle, not your number. With Personas, friends, work or your gaming crew see a different name and photo, all on one account.
How other apps handle it.
As of 26 October 2026
Signal
Signal's terms say you register with a phone number. Since 16 September 2026, Signal has been testing sign-up without a number in its Android beta, with an Account ID and Account Key, for a one-time fee of US$3 (prices differ per country).
Sources, checked 26 October 2026: Signal, Terms of Service and Privacy Policy (signal.org/legal); Signal, “Beta feedback for the upcoming Android 8.28 release”, Signal community forum (community.signalusers.org), 16 September 2026.
Threema
Threema gives you a random Threema ID and doesn't require a phone number or email address. It is a paid app: 6.00 (CHF, EUR or USD) once, depending on the app store and country. The desktop app needs the Threema app on a smartphone.
Sources, checked 26 October 2026: Threema, home page (threema.com); Threema, pricing page (threema.com/en/pricing); Threema, Threema private download page (threema.com/en/download).
Session
Session uses an Account ID instead of a phone number or email, and is free. Voice and video calls are a beta feature and use peer-to-peer networking, which shares your IP address with the other person. Restoring an account brings back only the last 14 days of messages.
Sources, checked 26 October 2026: Session, FAQ (getsession.org/faq).
Sign up with a handle, for free.
Polymorph has what you'd expect from an everyday messenger: groups, voice and video calls with group calls included, Stories, polls, events and shared lists, plus encrypted Files and, with Premium, Spaces for a team. It is made by Polymorph Technologies B.V., a Dutch company, with servers in the EU. Polymorph is in an invite-only beta.