Does Signal need a phone number?

Published 31 August 2026 by Nyra

Yes. Signal requires a phone number to register, and there is no official way around it. Since 2024, usernames let you hide that number from other users, but it still sits on your account and stays tied to your identity through your carrier. Apps needing no number: Session, SimpleX, Threema.

The phone number is the first thing most people notice when they install Signal, and the first thing many privacy-minded users wish they could skip. Here is the honest state of it in 2026, what usernames actually changed, and what to use if you want no number at all.

Signal requires a phone number to register

When you install Signal, registration sends a verification code by SMS or a call to a number you control, and the account is created against that number. There is no official, supported way to run Signal with no number whatsoever. People have tried voice-over-IP numbers and spare SIMs with mixed results, but that is a workaround, not a feature, and it can break at any time without warning.

So the plain answer to the question is yes. What has changed recently is not the requirement, but how visible your number is to the people you talk to.

Why Signal built it that way

Signal did not pick the phone number by accident, and it is worth understanding the reasoning before deciding it is a dealbreaker. Two goals drove the choice.

• Spam and abuse resistance. A phone number carries a small real-world cost and is hard to farm in bulk. That raises the price of spinning up throwaway accounts to spam, flood, or harass people, which keeps the network cleaner without heavy moderation.
• Contact discovery. The number let Signal answer the question new users care about most: which of my existing contacts already use this app. Your address book is a list of numbers, so matching on numbers made the network feel populated the moment you joined.

Both are genuine benefits. The cost is that the account is anchored to an identifier issued by a carrier, and that carrier knows who you are.

What usernames changed, and what they did not

In 2024 Signal added usernames, and a lot of coverage overstated what that means. Here is the precise version.

• What usernames do: you can connect with someone using a username instead of handing over your phone number, and you can hide your number from other users inside the app. The people you chat with no longer need to see your digits.
• What usernames do not do: the phone number is still required to register, and it still sits on your account behind the scenes. Usernames are a privacy feature between users, not a way to remove the number from your account.

So the accurate headline is this: usernames hide your number from the people you talk to, not from the fact that you registered with one.

Why the number still matters for some people

For most people, hiding the number from other users is plenty, and Signal remains an excellent choice with a protocol the rest of the industry copied. For some situations it is not enough.

If the risk you care about is a person or platform seeing your number, usernames solve it. If the risk is that your identity should never be attached to the account at all, because you are a source, an activist, or simply someone who does not want a carrier record linking you to a messenger, then a required number is a structural limit no username can lift. A number can be subpoenaed, leaked in a breach, or matched against other databases. An account that never collected one has nothing to give up.

Apps that need no phone number today

If a truly numberless account is what you need, these apps deliver it in 2026, each with an honest trade-off.

• Session. Your identity is a random ID, with no phone number and no email, and messages route through an onion network. The trade-off: its redesigned protocol dropped forward secrecy, so a compromised key can expose past messages. We put the two side by side on our Signal vs Session page.
• SimpleX. It goes furthest on identity, with no user identifiers at all, not even a random account ID. Conversations run over separate message queues. The trade-off is a less mainstream experience and a smaller network of people to reach.
• Threema. No phone number or email is required, and it has a long track record. The trade-off is that it is paid, a one-time purchase, which is a barrier for some people and a spam filter for others.

We keep a fuller rundown on our Signal alternatives page, and a step-by-step guide to messaging without a phone number if you want the practical how-to.

Where Nyra fits

Nyra is an anonymous, end-to-end encrypted messenger in development. It is not launched yet, and it has not been independently audited, so treat this as a design description rather than a track record.

Nyra is built from the start with no phone number and no email. An account is a username plus a recovery phrase, and the keys are derived from that phrase on your own device. There is nothing to hand over because nothing was collected. That choice is the whole reason the project exists, which is also why we are blunt about the trade-off it carries: lose your recovery phrase and the account is gone forever, because nobody, including us, can restore it.

If you want an account that was never anchored to a number, that is what Nyra is being built to be. It is not ready today. The waitlist gets one email when it launches, nothing else.

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