Moving from WhatsApp to Signal: A good idea?

This week we learned that the US Government uses Signal for communication, after a journalist was accidentally added to a Signal chat.

Accidental additions of people aside, the news has got regular folks asking if they should, too, be using Signal for private communications.

Probably the largest alternative to Signal, WhatsApp is owned by Meta, and has faced criticism for its data-sharing practices. But is switching to Signal truly an improvement? Let’s explore the differences between these apps and whether the move would be justified.

Bth WhatsApp and Signal offer end-to-end encryption, ensuring that only the sender and recipient can read messages. But the difference is that Signal employs “Sealed Sender,” a feature that hides metadata even from itself, whereas WhatsApp collects metadata such as phone numbers, IP addresses, and device information, which it shares with Meta and third parties.

As president of Signal Meredith Whittaker said in a statement to Dutch website Security.nl:

“WhatsApp collects and shares, when required, large amounts of private information that is not encrypted, like your profile picture, your location, your contacts, when you send a message, when you stop, who’s in your group chats, and so on.”

Signal collects minimal data, but it’s run by the non-profit Signal Foundation, which operates free from commercial interests. Signal’s open-source code allows for public scrutiny of its security claims, which is a transparency WhatsApp lacks.

Where Signal adds privacy-focused features such as call relay (to hide IP addresses), self-destructing messages, and customizable notification settings, WhatsApp provides more social features like status updates.

Switching to Signal is justified if privacy is your top priority. Its minimal data collection, transparency, and advanced security features make it superior to WhatsApp in protecting user information. However, for those who rely on WhatsApp’s massive user base or social features, the transition might be less convenient.

There is no inter-compatibility, so all participants in a conversation need to use the same app. Meaning that one of the few things holding many users back from switching from WhatsApp to Signal is leaving contacts behind that are not willing to move over.

Obviously, the decision is yours and depends on your personal priorities: privacy versus convenience.

Turn on those extra privacy features

To fully benefit from Signal’s privacy capabilities, users should enable the following features:

• Disappearing messages:
  • Open a chat in Signal.
  • Tap the three dots or profile icon to enter chat settings.
  • Select “Disappearing Messages” and set a timer (e.g., five minutes or one week). This ensures messages are automatically deleted after the specified time.
• Screen lock:
  • Go to Signal settings by tapping your profile avatar.
  • Navigate to “Privacy.”
  • Enable “Screen Lock” to require biometric authentication or a PIN to access the app.
• Relay calls:
  • Under “Privacy” settings, activate “Always Relay Calls.” This routes calls through Signal servers to hide your IP address from contacts.
• Incognito keyboard (Android only):
  • In “Privacy” settings, enable “Incognito Keyboard” to prevent your keyboard from sending typing data to third-party servers.
• Screen security:
  • For Android: Enable “Screen Security” to block screenshots within the app.
  • For iPhone: Turn on “Enable Screen Security” to prevent app previews in multitasking mode.
• Registration lock:
  • Activate this feature in “Privacy” settings to require a PIN for re-registering your account on new devices.

By enabling these features, users can ensure their conversations remain private and secure.

Another important tip is to check Group chat members. Before you send messages to a group, check who can read them: Open your group chat and tap on the group name to view chat settings. Scroll to the Members list and tap “View all members” to see the full list of group members.

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