The best Network Analyzer alternative to Little Snitch is Portmaster, which is both free and Open Source. If that doesn't work for you, our users have ranked more than 25 alternatives to Little Snitch, but unfortunately only two of them are Network Analyzers.
Free, open-source privacy suite monitoring all network activity, blocking unwanted connections, using trusted filter lists for ads and malware, enforcing DNS-over-TLS, providing custom app and global rules, and supporting advanced privacy management.
Visualizes real-time and historical network activity, delivers alerts for suspicious behavior and unknown connections, manages firewall rules, reports DNS and system changes, identifies remote hosts, monitors app usage, supports remote monitoring, and detects possible threats.
Austria
EU
Italy
Good software, reputable developers and it has even more features than Little Snitch.