As for data sharing with Facebook, WhatsApp shares the following user’s information with its parent app:
- Account registration information (mobile number)
- Transaction data from the WhatsApp payments update, if any
- Service-related information
- Device ID
- User ID
- Advertising Data
- Purchase History
- Coarse Location
- Email Address
- Payment Info
- Customer Support
- Product Interaction
- Other User Content
- Product Interaction
- Crash Data
- Performance Data
- Other Diagnostic Data
In the case of Signal, the only data it stores is your phone number. Also Signal doesn’t link your phone number to your identity.
- Phone Number
How is it different from WhatsApp?
Messages sent via Signal are said to have been encrypted, which means that the platform cannot obtain or store personal messages or media on its server. While WhatsApp offers end-to-end encryption for texts, it also has access to other personal data such as IP addresses, group details, and status.
In addition, the organization does not encrypt texts stored in the cloud. Even Telegram, a competing messaging app, is said to save a user’s contact number as well as user ID. If the devices are not connected, Signal will stockpile certain messages on its server until they are delivered.
Signal also allows the user to set a registration lock PIN, which aids in the protection of private profile information. This number could also be used to retrieve a user’s profile, settings, and contacts if the device is lost or switched to a new one. Another advantage is that, unlike WhatsApp, Signal is not possessed by a large technology company.
Now comes the question: WhatsApp vs Signal?
Signal is a well-known messaging app focused on its user’s privacy. Security experts, privacy researchers, and many more people across the globe use this app. Signal seems to be the most private messaging app and as per its privacy details, it doesn’t collect any huge user data.
Signal also underpins WhatsApp’s end-to-end encryption. There’s just one key difference between WhatsApp and Signal. Signal is open source whereas WhatsApp is closed source. When compared to WhatsApp and Messenger, Signal collects no user data whatsoever.