Little Snitch Alternatives

GlassWire

GlassWire is a network security monitoring tool and analyzer that visualizes your network activity on an easy to use graph, alerts you of possible threats, manages your firewall, and more. Network Monitor: GlassWire's network monitor visualizes your current and past network activity by traffic type, application, geographic location, all on a beautiful and easy to understand graph. Go back in time up to 30 days and see what your computer or server was doing in the past.

Features:

• Block apps
• Network activity
• Built-in Firewall
• Graphical component
• Intuitive Interface
• Network Monitoring
• Network Tools
• Push subscriptions
• Security & Privacy

NetLimiter

NetLimiter is an ultimate Internet traffic control and monitoring tool designed for Windows. You can use NetLimiter to set download/upload transfer rate limits for applications or even single connection and monitor their Internet traffic. Along with this unique feature, Netlimiter offers comprehensive set of internet statistical tools. It includes real-time traffic measurement and long-term per-application Internet traffic statistics.

Features:

• Bandwidth limiting
• Application Blocker
• Built-in Firewall
• Net Limiting
• Priorities

BiniSoft.org Windows Firewall Control

Windows Firewall Control is a powerful tool that extends the functionality of the Windows Firewall and provides new extra features that make Windows Firewall better. It runs in the system tray and allows the user to control the native firewall easily without having to waste time navigating to specific parts of the firewall. Windows Firewall Control offers four filtering modes that can be readily activated: - High Filtering - All outbound and inbound connections are blocked.

Features:

• Application Blocker
• Network Monitoring

ZoneAlarm Firewall

ZoneAlarm Free Firewall blocks hackers from infiltrating your home PC by hiding your computer from unsolicited network traffic. By detecting and preventing intrusions, ZoneAlarm Free Firewall keeps your PC free from viruses that slow down performance, and spyware that steals your personal information, passwords, and financial data.

AFWall+

Firewall (iptables frontend), based on DroidWall which is no longer being developed. A paid "donate"-version with more features it advertised within the app. Import/Export Rules to external storage Search Applications Multiple profiles with custom names Highlights system applications with custom color Notify on new installations VPN Support Device Admin support to protect against being uninstalled Requires root: Yes. iptables must run as root.

Features:

• Multiple languages
• Root required

LuLu by Objective-See

LuLu is the free, shared-source firewall for macOS. Its goal is simple; block any unknown outgoing connections, until approved by the user. While it was designed to generically detect malware by flagging unauthorized networking connections, LuLu can also be used to block OS components or 3rd-party applications from transmitting information to remote servers. What's to like about LuLu? Lots! 100% free As in no ads, no time trials, no missing features.

Features:

• Network Monitoring
• Outbound firewall
• Source code history

Radio Silence

Radio Silence lets you block individual apps from accessing the internet. It never throws pop-ups on the screen, and is completely invisible.

Hands Off!

Hands Off! is an application to monitor and control the access of applications to your network and disks. Being able to monitor the normally unnoticeable activities enables you to make informed decisions regarding the transfer of your private information, hence avoiding confidential information leakage.

OpenSnitch

OpenSnitch is a GNU/Linux port of the Little Snitch application firewall.

Features:

• Application Firewall
• Network Monitoring

TripMode

Block internet connection for apps.

Features:

• Network Monitoring
• Networking