WhatsApp is quietly testing a feature that lets people join a call through a secure web link without signing in, following a wider push to make private conversations less tied to accounts and phone numbers. The test is small, the rollout is uncertain, and the underlying WhatsApp account model has not changed. If the reason to place a call is that a number should never be attached to it, an experiment inside the world’s largest phonebook is not the finish line. Seven Android apps already let you set up an encrypted voice or video call without giving up a mobile number, and several of them route metadata in ways that even the app operators cannot see. This shortlist is for journalists, activists, support workers, and anyone else who wants a call that leaves as small a trail as the conversation itself.
What to look for in an anonymous encrypted call app
Five criteria separate a private call from a marketing claim:
- No phone number required. Signup happens through a username, a random ID, a QR code, or nothing at all. A verification SMS breaks the anonymity model before the first call.
- End-to-end encryption on calls, not just chat. Voice and video payloads are encrypted between endpoints, using an audited protocol such as the Signal Protocol, MLS, or SRTP with DTLS.
- Minimal server-side metadata. Sealed sender, onion routing, or peer-to-peer transport means the operator cannot log who called whom, when, and for how long.
- Open-source and independently audited. The client (and ideally the server) can be inspected. Independent audits back the claims in the app store listing.
- Cross-platform. The person on the other end of the call almost always uses a different phone or a laptop, so iOS, desktop, and web builds matter as much as the Android app.
Quick comparison
| App | Best for | Signup | Free plan | Standout feature |
|---|---|---|---|---|
| Signal | Best overall | Phone or username | Yes, fully free | Sealed sender hides call metadata |
| Session | No phone number, ever | Random Session ID | Yes, fully free | Onion routing over the Lokinet |
| Element | Federated networks | Username on any Matrix server | Yes | Bring your own server, keep your data |
| Jitsi Meet | Group calls with no accounts | None required | Yes | WhatsApp-style join-by-link, no sign-in |
| Wire | Small teams and NGOs | Email or username | Personal plan | MLS end-to-end encryption on group calls |
| Threema Libre | Paid, ID-only | Random Threema ID | Paid app, no subscription | Swiss-hosted, no phone or email |
| Briar | Off-grid and high-risk | Local contact add | Yes, fully free | Works over Tor, Wi-Fi, or Bluetooth |
The apps
1. Signal – Best overall
Signal remains the reference implementation for encrypted voice and video calls, and the 2024 rollout of optional usernames took the last hard requirement (a phone number visible to contacts) off the table. Calls run over the same Signal Protocol that secures messages, sealed sender hides who is calling whom from Signal’s own servers, and the group call feature scales to dozens of participants without changing the trust model. The Android app is polished, the desktop and iOS builds match feature for feature, and there is no paid tier trying to unlock the good stuff.
Where it falls short: Account creation still needs a phone number for the initial signup, even if you later share only a username. People who cannot receive an SMS on any number are effectively locked out.
Pricing:
- Free, funded by the Signal Foundation
Platforms: Android, iOS, Windows, macOS, Linux
Download: Aptoide | Google Play
Bottom line: The right default for most people who want encrypted calls, and the app to beat on protocol quality.
2. Session – Best if you refuse to share a phone number
Session is what Signal would look like if the phone number requirement was never there in the first place. Signup produces a random Session ID that is the only handle anyone ever sees, and calls plus messages travel through the Lokinet, an onion-routed service network that hides IP addresses from both the recipient and the network operators. Voice calls are one-to-one and work well on modern Android hardware, and there is no central server that could hand over a subscriber list because no such list exists.
Where it falls short: Group video calls are not the strong suit. Message delivery over onion routing is slower than direct connections, and adding a contact means exchanging a long alphanumeric ID by another channel.
Pricing:
- Free, funded by the Session Technology Foundation
Platforms: Android, iOS, Windows, macOS, Linux
Download: Aptoide | Google Play
Bottom line: The strongest pick for anyone whose threat model rules out ever attaching a phone number to the account.
3. Element – Best for federated networks
Element is the flagship Matrix client, and Matrix is the closest thing the encrypted messaging world has to email: a federated protocol where you pick a homeserver (or run your own) and still talk to everyone else. Element on Android supports end-to-end encrypted one-to-one and group calls using MLS, and the usernames are shaped like Matrix addresses (@name:server.tld) so nothing on the profile ever needs to reveal a phone. Organisations that want to keep control of the metadata run their own homeserver and get real anonymity from anyone outside it.
Where it falls short: The onboarding is heavier than the alternatives because you have to understand the homeserver choice up front. The public matrix.org server has been slow at times and is worth avoiding if performance matters.
Pricing:
- Free client
- Optional Element Server Suite subscription for hosted homeservers
Platforms: Android, iOS, Windows, macOS, Linux, web
Download: Aptoide | Google Play
Bottom line: The pick for teams that want to own their own server and still get encrypted calls that reach the wider Matrix world.
4. Jitsi Meet – Best for account-free group calls
Jitsi Meet is the app WhatsApp’s account-free calls test is chasing. Open the app or the web client, tap a button, share the resulting link, and other people join without an account, a login, or a phone number. End-to-end encryption is available for smaller meetings using the browser’s insertable streams API, and larger rooms fall back to server-mediated encryption that is still transport secure. The Android client behaves like a mobile version of the web meeting rather than a chat app, which is exactly the point.
Where it falls short: The default meet.jit.si server logs are minimal but not zero, and the public server is best treated as convenience infrastructure rather than a hardened platform. Full end-to-end encryption is limited to smaller rooms.
Pricing:
- Free on the public meet.jit.si server
- Self-hosting is free and documented
Platforms: Android, iOS, web, desktop via web
Download: Aptoide | Google Play
Bottom line: The fastest way to get a stranger onto a video call without either side creating an account.
5. Wire – Best for small teams and NGOs
Wire started life as a consumer messenger and settled into a niche serving NGOs, journalists, and small businesses that want end-to-end encryption on both messages and calls, with a management console for team accounts. Personal signup runs on email rather than a phone number, and the Android client handles voice and video conferences for the whole team without downgrading the encryption model. Wire is one of the first major consumer clients to ship MLS, the newer group messaging standard designed to make large encrypted rooms sustainable.
Where it falls short: The free personal tier has fewer features than it once did, and the app is clearly optimised for team use rather than casual chat. Independent audits are less frequent than Signal’s.
Pricing:
- Free personal account
- Paid team plans billed per user, per month
Platforms: Android, iOS, Windows, macOS, Linux, web
Download: Aptoide | Google Play
Bottom line: The pick for a small newsroom or advocacy team that needs one tool for group chat, files, and encrypted calls.
6. Threema Libre – Best for ID-only accounts on Google Play alternatives
Threema Libre is the fully open-source, Google-services-free build of the Swiss messenger, distributed through F-Droid and Aptoide rather than the main Play Store. The signup step generates a random Threema ID and nothing else; email and phone are strictly optional. Voice and video calls run end-to-end encrypted using the NaCl cryptography library, servers sit in Switzerland under GDPR, and the paid one-time price keeps the incentives honest.
Where it falls short: The consumer variant on Google Play is a paid app, and Threema Libre carries the same license cost from alternative stores. The user base is smaller than Signal’s, which matters when the person you need to call has to install the app first.
Pricing:
- One-time purchase from Aptoide or the Threema Shop
- No subscription, no ads
Platforms: Android, iOS, Windows, macOS, Linux, web
Download: Aptoide | Threema Shop
Bottom line: The right buy for anyone who wants a paid, jurisdictionally clean, phone-free messenger and does not mind installing outside the Play Store.
7. Briar – Best for off-grid and high-risk situations
Briar is the peer-to-peer outlier. There is no central server: messages sync directly between devices over Tor when the internet is available, or over local Wi-Fi and Bluetooth when it is not. Voice calls are handled via a companion Briar Mailbox and work in a similar model, with keys exchanged in person via QR code so that no external directory ever holds a contact list. The app is designed for protest situations, disaster response, and reporting from places where infrastructure is either watched or absent.
Where it falls short: The peer-to-peer model rules out the usual convenience features. Contacts have to be added in person or via a mutual friend, message delivery is not instant when both parties are offline, and the interface is functional rather than polished.
Pricing:
- Free and open source, maintained by the Briar Project
Platforms: Android, desktop (Windows, macOS, Linux) via Briar Desktop
Download: Aptoide | Google Play
Bottom line: The tool to reach for when the network itself is part of the threat model.
How to pick the right one
Start from the constraint that matters most and work back to the app.
- If you want the least friction for the person on the other end, install Signal. Almost everyone can be talked through the setup, and the sealed sender protocol still buys real metadata protection even though the initial signup uses a phone number.
- If you refuse to share any phone number ever, Session and Threema Libre are the two clean answers. Session is free and onion-routed; Threema Libre is a paid app that hides your identity behind a random ID and stores data in Switzerland.
- If you need a group call with people who will not install anything, Jitsi Meet solves the problem in one link. It is the closest existing analogue to what WhatsApp is testing, without the WhatsApp account.
- If you run a small team that wants one tool for chat, files, and calls, Wire is the workhorse. It also ships MLS, which future-proofs the group encryption story.
- If you want to own the server your calls run through, Element on a self-hosted Matrix homeserver keeps every piece of metadata inside your organisation.
- If your threat model includes the network being watched or offline, Briar is the only option here that keeps working when the internet does not.
Pick one, install it on both ends before the first call, and verify the safety numbers or QR codes in person or over a channel you already trust.
FAQ
Can I make encrypted calls without a phone number on Android? Yes. Session, Threema Libre, Element, Jitsi Meet, and Briar all support account creation without a phone number. Signal and Wire require an email or phone number to sign up, but Signal can then hide the number from other users via its username feature.
Is Signal truly anonymous? Signal encrypts every call and message end-to-end and applies sealed sender to hide call metadata from its own servers. The initial signup step still requires a phone number, so Signal is best described as strongly private rather than fully anonymous. Usernames make it possible to communicate without revealing the number to contacts.
Does WhatsApp encrypt voice and video calls? WhatsApp uses the Signal Protocol to end-to-end encrypt calls and messages between users. Metadata such as who called whom and when is still visible to Meta, which is the gap that account-free calls and dedicated privacy apps aim to close.
What is the difference between end-to-end encryption and server-side encryption? End-to-end encryption keeps the content readable only by the two endpoints. Server-side or transport encryption protects the data in transit and on the operator’s disks, but the operator itself can decrypt and read it. Any anonymous call app worth using ships end-to-end encryption by default.
Do encrypted call apps work over slow or restricted networks? Signal, Wire, and Threema Libre handle typical mobile connections without issue. Session, Briar, and Element over Tor add extra latency because of the onion routing or federated hops, so voice quality suffers first when the network gets slow. Jitsi Meet degrades gracefully by dropping video before audio.
