Quantum Flare is described as '1) Anti-phishing & anti-ransomware: Protects you from apps that steal login credentials or credit card numbers. Complete ransomware threat attack protection' and is an app. There are more than 10 alternatives to Quantum Flare for a variety of platforms, including Android, Android Tablet, F-Droid, Mac and Linux apps. The best Quantum Flare alternative is NetGuard, which is both free and Open Source. Other great apps like Quantum Flare are Little Snitch, App Manager, Tiny Shield and AFWall+.