A Free Threema Alternative With No Phone Number

Yes, there is a solid free Threema alternative with no phone number: Graphite, an end-to-end-encrypted messenger from PrivacyPortal that you can use without paying, without a SIM, and without an email address. Threema is a respected paid app from Switzerland that also lets you sign up without a number, so this comparison is really about cost, design philosophy, and the trade-offs of moving to a newer, free option.

Why people choose Threema in the first place

Threema built its reputation on a simple promise: you can message privately without tying your identity to a phone number. A few things make it appealing:

• No phone number required. You get a random Threema ID instead of registering with a SIM.
• Swiss base. Many privacy-focused users like that Threema operates under Swiss data-protection law.
• A paid model. Threema is a paid app, and its clients are open-source. Paying up front, rather than "paying" with your data through ads, is a deliberate part of the pitch.

If you already own Threema and your contacts use it, it remains a perfectly reasonable choice. The reason people go looking for an alternative is almost always the same one: price.

Why look for a free alternative?

The paid model is a strength for funding development, but it is also friction:

• You have to pay before you can really try it.
• Getting friends and family onto a paid messenger is a hard sell. Network effects only work if the other person installs it too.
• Some people simply want to test a private messenger with zero commitment first.

A good free alternative should match Threema on the thing that mattered most, no phone number, without quietly reintroducing an email requirement or an account you cannot delete. That is the bar.

What "no phone number" should actually mean

"No phone number" is only meaningful if the app does not replace the number with another identifier that ties back to you. The strongest version of the idea is an identity that lives on your device, not on a company's servers.

• Threema issues a random Threema ID so you are not searchable by number.
• Graphite goes a step further: your identity is a 12-word recovery phrase generated on-device, and there is no account on the server at all. Nothing to link to a SIM, an email, or a real name.

If you are comparing several options on this specific point, our guide to the best encrypted messenger with no phone number breaks down the different identity models side by side.

Graphite: a free, no-phone, no-email messenger

Graphite is designed so that "private by default" is not a setting you have to hunt for. Here is what it does, stated plainly:

• No phone number, no email. Your identity is a 12-word recovery phrase created on your device. There is no account on the server to seize, subpoena, or leak.
• Strong, modern encryption. Messages are end-to-end encrypted with NaCl/libsodium X25519 sealed boxes, wrapped in a hybrid post-quantum layer (ML-KEM-768), with forward secrecy from a Signal-style double ratchet.
• Tor by default. Graphite bundles Tor and connects to a hidden service, fail-closed, so your IP and network are hidden with no extra configuration. (Threema does not route over Tor, so it does not hide your IP this way.)
• A no-logs relay. The relay only ever stores sealed ciphertext, never your plaintext, keys, or recovery phrase, with a 7-day maximum TTL, and messages are deleted after delivery.
• Encrypted voice and video calls. Calls use DTLS-SRTP; on mobile, they are routed so the other person does not see your IP address. Real-time call media travels peer-to-peer for quality, while signaling and messages go over Tor.
• On-device AI search, groups, and files. You can search your messages with on-device AI (nothing is uploaded), run encrypted group chats, and share files.
• Runs where you need it. A portable Windows .exe with bundled Tor, an Android APK that works on GrapheneOS and de-Googled phones with no Google Play Services, and a web app.

Graphite is free and currently in public beta (v1.13.25).

Threema vs Graphite at a glance

What matters	Threema	Graphite
Cost	One-time paid purchase	Free (public beta)
Phone number to register	Not required	Not required
Email to register	Not required	Not required
Identity	Random Threema ID	12-word recovery phrase, generated on device
Account on a server	Threema ID	None
Built-in Tor / IP hiding	No	Yes, on by default
Platforms	Mobile + desktop	Windows, Android, web

A "No" here is not a knock on Threema's overall quality; it is a mature, well-built app. It simply reflects a different design: Threema was not built around onion routing, and Graphite was.

The honest trade-offs

Switching to a free, newer app is not a free lunch, so here is the balanced view:

• Maturity. Threema is an established, paid product with years behind it. Graphite is in public beta: capable, but younger.
• Speed vs. anonymity. Routing everything over Tor by default adds latency. Graphite accepts that trade for messaging and signaling, then sends call media peer-to-peer so voice and video stay responsive.
• Funding model. Threema's purchase price funds its work directly. Graphite is free during beta; if a clear business model matters to you, weigh that.
• Ecosystem. Whichever you pick, your contacts have to install it too.

If your main reason for leaving is a phone-number requirement rather than price, it is worth reading our take on a Signal alternative without a phone number as well, since the identity trade-offs there are similar.

So, is there a genuinely free Threema alternative?

Yes. If the appeal of Threema was no phone number and a privacy-first design, Graphite delivers that for free, and adds Tor-by-default network privacy, a post-quantum encryption layer, and an on-device identity with no server account. Threema remains an excellent paid option; Graphite is the free, no-phone, no-email path to the same core idea. For the bigger picture on how these apps differ under the hood, start with our pillar guide to the encrypted messenger landscape.

Try Graphite free

Graphite is a free public beta you can run on Windows, Android, and the web, with no phone number, no email, and no logs. Download it and start messaging privately in a couple of minutes at graphite.chat.