# Firewall software

7 apps ranked by verified data.
Source: https://altcatalog.com/category/firewalls/

## Apps

- [GlassWire](https://altcatalog.com/alternatives/glasswire.md) — Visual network monitoring firewall
- [Little Snitch](https://altcatalog.com/alternatives/little-snitch.md) — The Mac outbound-connection guardian
- [LuLu](https://altcatalog.com/alternatives/lulu.md) — Free open source Mac firewall
- [NetGuard](https://altcatalog.com/alternatives/netguard.md) — No-root Android firewall
- [OPNsense](https://altcatalog.com/alternatives/opnsense.md) — The friendlier pfSense fork
- [pfSense](https://altcatalog.com/alternatives/pfsense.md) — The open source router/firewall OS
- [Portmaster](https://altcatalog.com/alternatives/portmaster.md) — Open source app firewall with DNS filtering

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Ranked by verified data, never by who paid. https://altcatalog.com/trust/