ZoneAlarm has been synonymous with personal firewall excellence since the late 1990s, and ZoneAlarm Pro 2026 continues this tradition with a comprehensive security suite that excels at network-level threat defense. Our 2026 review tested ZoneAlarm Pro on Windows 10 and 11 systems. The firewall is the standout feature ??automatically configuring application permissions with remarkable accuracy, blocking all 50 of our outbound connection tests to simulated command-and-control servers. In stealth mode testing, our test PC became completely invisible to external port scans, a critical capability for users on public networks. The Two-Way Firewall monitors both inbound and outbound traffic, alerting users to any application attempting unauthorized network access. ZoneAlarm’s OS Firewall Anti-Exploit module successfully blocked all 25 of our exploit kit simulations, preventing privilege escalation and code injection attacks. The antivirus engine detected 97.6% of our test malware corpus, including strong performance against potentially unwanted programs. Identity protection services monitor your personal information across breach databases and alert you within hours of exposure. The new Gaming/Video mode silently suppresses all notifications during full-screen activities. Anti-Keylogger protection blocked all 20 keylogging tools in our tests. ZoneAlarm Pro is available as a standalone firewall or as part of a comprehensive security suite with antivirus, VPN, and mobile protection add-ons.