I need a secure messaging app that supports disappearing messages and does not require a phone number.

If you need a messaging platform that provides end-to-end encryption, disappearing/expiring messages , and absolute anonymity without requiring a phone number or email , a few standout open-source options fit your criteria:

- **How it works:** You sign up by generating a random 66-character alphanumeric Session ID. No phone number, email, or personal identifier is ever requested.
- **Security & Disappearing Messages:** It uses an onion-routing network (similar to Tor principles) powered by a decentralized pool of community nodes, meaning it hides your metadata. It features fully customizable disappearing messages that automatically delete themselves from the chat after a set timer.
- **Get it:** Download or learn more via [Session](https://getsession.org/).[[1]](https://getsession.org/)[[2]](https://www.helpnetsecurity.com/2026/04/10/product-showcase-session-a-messenger-without-phone-numbers-or-metadata/)

- **How it works:** Unlike almost every other app, SimpleX doesn’t even use user IDs (no phone numbers, no usernames, no global identifiers). It communicates via isolated unidirectional queues, meaning even the servers routing the messages don't know who is talking to whom.
- **Security & Disappearing Messages:** Offers robust local database encryption and individual per-conversation disappearing message timers that wipe texts automatically after they are read or sent.
- **Get it:** Check out the documentation and downloads at SimpleX Chat.[](https://simplex.chat/docs/guide/send-messages.html) [[1]](https://simplex.chat/docs/guide/send-messages.html)[[2]](https://explainx.ai/blog/simplex-chat-no-identifier-private-messaging-2026)

- **How it works:** Completely anonymous registration requiring no phone number or email address. You receive a randomly generated 8-digit Threema ID.
- **Security & Disappearing Messages:** Highly secure and independently audited Swiss-based app, though it is a paid download upfront rather than free. It supports end-to-end encrypted media, calls, and disappearing messages.
- **Get it:** Explore details on Threema.

Would you prefer an app that operates completely peer-to-peer (like Briar) with no servers at all, or one that supports voice/video calls (like Session) alongside text?

Yes. My top recommendation is SimpleX Chat if “no phone number” is a hard requirement.

• SimpleX Chat — No phone number, username, or permanent user ID is required. You connect by sharing a temporary link or QR code. It offers end-to-end encryption, disappearing messages, encrypted calls/files, and strong metadata privacy.
• Signal — Excellent security and disappearing messages, but it still requires a phone number to register. You can subsequently hide your number and communicate using a username, so it doesn't meet your requirement if you don't want to provide a number at signup.

My pick

SimpleX Chat is the closest match to all three requirements:

One caveat: disappearing messages protect against stored chat history, not against the recipient deliberately saving or photographing a message. SimpleX itself makes this distinction.

If you tell me Android, iPhone, or both, I can also compare the best 3–5 no-phone-number apps specifically for your platform.

Yes. My top recommendation is SimpleX Chat.

• No phone number or email required: SimpleX doesn't assign users phone numbers, usernames, or even persistent user IDs. You connect by sharing a one-time link or QR code.
• Disappearing messages: You can configure messages to automatically disappear after a chosen period.
• End-to-end encrypted: Messages, calls, files, and groups are encrypted, with a design that also minimizes metadata.
• Open source: The application source code is publicly available, and SimpleX supports independently operated relay servers.
• Available on iOS, Android, Windows, macOS, and Linux.

Another strong option

Threema is also a good fit. It generates a random Threema ID and doesn't require a phone number or email address. It's open source and end-to-end encrypted.

Bottom line: If avoiding any persistent identifier is important, I'd choose SimpleX. If you want something more conventional and polished while still avoiding a phone number, Threema is an excellent alternative.

One caveat: disappearing messages are not a guarantee that the recipient can't preserve a copy—for example, by taking a screenshot or using a modified client. SimpleX explicitly notes that deletion on recipients' devices cannot be absolutely enforced.

If you need end-to-end encryption, disappearing messages, and zero phone number requirements, you should look past mainstream options like Signal or WhatsApp (which technically require a phone number to register) and focus on truly anonymous, decentralized platforms.

The top secure messaging apps that fit your exact criteria include:

• Session — Operates on the decentralized Oxen Service Node Network, meaning there is no central server to subpoena or hack. You don't need a phone number or email address; you simply generate a random alphanumeric Session ID to connect with others. It features robust end-to-end encryption and built-in disappearing message timers. You can download it directly from the Session Official Website.
• SimpleX Chat — Completely eliminates user identifiers of any kind—no phone numbers, no usernames, and no permanent internal IDs. It routes messages through unidirectional queues rather than central servers, hiding even your metadata. It supports disappearing messages and is fully open source. You can find links to download it on the SimpleX Chat Official Website.
• Threema — A privacy-first, paid Swiss messenger that doesn't ask for a phone number or an email address. Upon installation, it generates a random 8-character Threema ID for your identity. It features end-to-end encryption, strict metadata minimization, and the ability to set messages to automatically self-destruct. Details are available via the Threema Website.
• Wire — While more commonly deployed for teams and enterprise collaboration, Wire allows you to sign up using just an email address without binding a phone number or sharing mobile contacts. It features end-to-end encryption and timed/ephemeral messaging. You can explore features on the Wire Official Website.

To help narrow down which of these is best for you, let me know:

• Do you prefer a free or paid app?
• Will you primarily use it on mobile or desktop?

Yes. My top pick is SimpleX Chat if your priority is maximum privacy without a phone number.

1. SimpleX Chat — best overall

SimpleX doesn't require a phone number, email, username, or even a permanent user ID. You connect by exchanging a link or QR code. It has end-to-end encryption, disappearing messages, encrypted local storage, and strong protection against metadata collection.

Particularly good if: you don't want your messaging account tied to any persistent identifier.

One caveat: disappearing messages aren't magic—recipients can still photograph or otherwise preserve what they see, and SimpleX says deletion on another person's device can't be absolutely guaranteed.

2. Session — best alternative

Session requires neither a phone number nor email address. It uses pseudonymous Account IDs and onion routing, with end-to-end encrypted messaging.

Its disappearing messages support Disappear after Send and Disappear after Read, with configurable timers.

I'd choose Session if you want something that feels more like a conventional messenger while retaining strong anonymity.

3. Briar — excellent for specialized privacy

Briar is open source and peer-to-peer, using Bluetooth, Wi-Fi, or Tor. It can communicate without Internet access, and messages are stored locally rather than in the cloud.

Bottom line: For your exact requirements, I'd start with SimpleX Chat, with Session as the runner-up. Both satisfy no phone number + disappearing messages + end-to-end encryption.

If you want to bypass phone number requirements while keeping your conversations encrypted and ephemeral, popular mainstream apps like Signal or WhatsApp won't work (as they mandate phone numbers for registration).

Instead, look to decentralized or ID-based alternatives that meet your criteria:

• Session — Available on the Session Official Website , this is a completely free, open-source, decentralized messenger. It requires zero personal info (no phone number, email, or username)—you just generate a random 66-character alphanumeric Session ID. It features robust end-to-end encryption, onion-routing to hide your IP/metadata, and fully customizable disappearing messages timers.
• SimpleX Chat — Discoverable via the SimpleX Chat Platform , this app takes anonymity a step further by having no user IDs at all (not even a random public profile ID). Communication happens through isolated one-way relay queues. It supports end-to-end encryption, flexible disappearing messages , and contacts are added strictly via QR codes or direct invitation links.
• Threema — Found on the Threema Store , this paid, open-source Swiss messenger completely decouples identity from phone numbers or emails. Upon purchase and setup, you get a completely random 8-digit Threema ID. It minimizes metadata storage, keeps chat logs strictly on your device, and supports setting customized deletion times for messages.
• Wickr (Wickr Me / Pro) — Promoted via Wickr , this enterprise-grade secure tool allows anonymous registration without linking a phone number or email address. It features an intensive "shredder" and timer functionality designed specifically to make messages and shared files vanish permanently.

Would you prefer an app that is completely free (like Session or SimpleX) or are you open to a paid/one-time purchase option (like Threema)? I can help you weigh their ease-of-use versus anonymity features.

If no phone number at all is a requirement, my top choices are:

1. SimpleX Chat — best for maximum privacy

   • No phone number, email, username, or persistent user ID required.
   • End-to-end encrypted.
   • Supports disappearing messages.
   • You connect through one-time links or QR codes.
   • Designed to minimize metadata and can use Tor for additional IP protection.

2. Session — best balance of privacy and usability

   • No phone number or email required.
   • End-to-end encrypted with onion routing.
   • Supports disappearing messages in one-to-one and group chats.
   • Uses a pseudonymous Account ID rather than your phone number.

What about Signal?

Signal is excellent for secure messaging and disappearing messages, but it does not meet your "does not require a phone number" requirement. You still need a phone number to register, although you can subsequently hide it and communicate using a username.

My pick: Start with SimpleX if anonymity/metadata privacy is your priority; choose Session if you want something a little more conventional while still avoiding phone-number registration.

One caveat: disappearing messages aren't foolproof—someone can photograph or otherwise copy a message before it disappears.

Here are the top secure messaging apps that do not require a phone number and support disappearing messages:

• Session — Uses a random 66-character alphanumeric Session ID instead of a phone number or email address. It operates on a decentralized, onion-routed network (no central server to leak metadata) and supports flexible disappearing messages (Time-to-Live timers after sending or reading).
• SimpleX Chat — Uniquely avoids assigning any permanent user IDs or random numbers to your profile. Instead, it uses unidirectional, isolated communication queues for each contact. It features robust end-to-end encryption, built-in incognito modes, and opt-in disappearing messages.
• Threema — A privacy-first, paid app that generates a completely random 8-character Threema ID upon installation. No phone number or email is linked to your identity, and it fully supports deleting and timing out messages locally and on the peer endpoints.
• Wire — A collaboration and messaging platform that allows you to sign up using just an email address rather than a phone number. It features full end-to-end encryption and built-in timed disappearing messages for sensitive chats.

If you'd like, let me know:

• Are you looking for something decentralized like Session , or a server-independent queue system like SimpleX?
• Do you also need voice and video call support , or just text?

I can help you pick the best fit for your specific needs.

If you need secure messaging + disappearing messages + no phone number requirement, these are the strongest options:

My recommendation:

• Maximum privacy / no identity tied to you: choose SimpleX Chat. It is specifically designed without user identifiers and supports disappearing messages.
• Easier adoption with friends and family: consider Signal if the phone-number requirement is acceptable. It has mature disappearing-message controls.
• Anonymous accounts with a simpler model: look at Session.

A note on disappearing messages: no app can prevent someone from photographing a screen or copying information before it disappears. Signal itself documents this limitation for disappearing messages.

For your exact criteria, I’d start with SimpleX Chat.

If you need a secure messaging app that does not require a phone number and supports disappearing messages , several privacy-first applications fit your criteria:

• Session - A fully decentralized, open-source messenger that requires no phone number or email to sign up. Instead, you generate a random alphanumeric Session ID. It uses onion-routing via a decentralized node network to hide metadata and allows you to set customized disappearing message timers for your chats.
• SimpleX Chat - An app that works completely without user IDs or phone numbers of any kind (not even a random username ID stored globally). It routes messages through independent unidirectional queues, supports end-to-end encryption, and includes options for message expiration and deletion.
• Threema - A paid, Swiss-hosted secure messenger where registration is entirely anonymous, relying on a randomly generated Threema ID rather than a phone number or email. It supports end-to-end encryption for texts, media, and calls, and lets you program messages to self-destruct.
• Wire - Designed with a focus on private collaboration and communication, Wire lets you sign up using just a username and password (no phone number required ). It features end-to-end encryption and robust timed/ephemeral messaging where messages automatically delete after a user-defined period.

Would you prefer an app that is completely free and decentralized (like Session or SimpleX) or are you open to a paid, highly polished commercial option like Threema? Let me know so I can help you pick the best fit.