Yes. Signal’s open-source nature, end-to-end encryption, and commitment to never collecting user data make it one of the safest messaging apps around. Of course, some situations may compromise this security, such as when an attacker physically gets a hold of your device. Locking your phone and the app with a PIN and using disappearing messages can help avoid this. You can also use a VPN like CyberGhost to further obscure your identity and prevent a third party or Signal from seeing your actual IP address.