OPNsense is #7 in Top 10 Firewall software

https://opnsense.org/

OPNsense

Free & Open source firewall. Everything essential to protect your network and more

Positions in ratings

#7 in Top 10 Firewall software

Alternatives

The best alternatives to OPNsense are: pfSense, Untangle NG Firewall, IPFire, Sophos Firewall, FortiGate

See also:
Top 10 Firewall software