Alternatives to ZoneAlarm Free Firewall

IPFire

IPFire suits individuals, businesses, and organizations that need a self-hosted firewall for networks ranging from home offices to larger deployments.

Comodo Internet Security

It suits Windows users looking for antivirus, firewall, and file-isolation features in one product.

CrowdSec

CrowdSec suits teams looking to detect and block malicious IP activity across infrastructure or protect web applications.

GlassWire suits users who want to monitor network activity and manage app connections on Android or Windows.

NG Firewall suits organizations seeking network security and management capabilities across hybrid deployments.

NethSecurity

NethSecurity is aimed at small and medium-sized businesses needing firewall, traffic management, threat protection, and VPN capabilities.

ManageEngine Firewall Analyzer

It suits network administrators who need multi-vendor firewall log reporting and configuration tracking.

TNSR may suit businesses, ISPs, internet telephone providers, hosting providers, managed service providers, and SaaS providers with routing or VPN workloads.

OpenWrt suits users who want to customize embedded devices such as wireless routers and are familiar with GNU/Linux and basic networking concepts.

FireMon

FireMon is intended for global enterprises, government agencies, and service providers managing security policy across complex environments.

It suits Linux users protecting a home or small network, or people working in home labs and learning environments.

NSM suits security teams managing distributed SonicWall firewall environments, including multiple customers or locations.