Little Snitch is a monitoring or firewall tool that will help you see what is really happening with your data. This tool alerts you every time an application tries to connect to the internet, giving you the possibility of allowing or not allowing the connection, so that no information is shared without your permission, and the decision you make will be remembered by the application not to having to ask you in the future.

Best Alternatives to Little Snitch

Instead of all its beautiful aspects, I am going to share the top 10 Little Snitch alternatives which will help you to keep your PC secure. These similar software to Little Snitch work with Windows and Mac, have a look:

Little Snitch is a popular Mac app that detects outbound connections and lets you set up rules to block those connections. Nov 26, 2018 Little Snitch is probably the best host-based application firewall solution for macOS app. I’ve been using it for quite a while but recently ditched it when I found a free alternative that equally works great. If you’re using the free version of Little Snitch, you have to deal with the fact that it automatically quits after every three hours. Little Snitch is a popular Mac app that detects outbound connections and lets you set up rules to block those connections. Once installed, Little Snitch monitors your internet traffic and every time it detects an outbound connection, for example, Adobe Reader trying to access the internet, it pops up a window and ask you if you want to allow the connection one time, or make a rule to allow.

Quick Overivew

Glasswire

GlassWire is a free firewall for Windows systems that will allow us to control all the applications that connect to the Internet, the traffic that generates and the remote servers to which it connects. It wants to function as an application control software that does not protect but allows us to know at all times the network activity of any application or process of our operating system.

Key Features

The moment you observe that traffic increases unexpectedly, it is possible to know which application on the computer caused it.
The GlassWire graph makes it easy to know the outgoing traffic, the loads displayed in yellow, and the incoming traffic, with the downloads displayed in pink.
To get to know network traffic in-depth, you can zoom out on the graph to know the activity for three hours, 24 hours or a whole week.
It has a firewall that shows all communication between applications in a table that also shows the servers that each application communicates with.

Highlights

GlassWire has a simple and attractive interface that makes it easy to know the information on your network, and best of all, it is completely free.

Download link: https://www.glasswire.com/
File size: 38.6 MB
System support: Windows and Android

LuLu

LuLu is a well known open-source firewall for macOS to block unauthorized outgoing connections, like the famous Little Snitch. The tool offers the user the possibility of establishing defined rules in which programs are authorized or not to establish connections on the network.

Key Features

Prevent unauthorized connections that could be made without your knowledge through a suspicious program.
For each connection attempt detected, LuLu displays an alert with which you can choose to allow the connection or block it.
LuLu offers you the possibility of automatically accepting connections made by Apple applications.
For the time being still in development, LuLu can be installed using a command line to be entered in the macOS terminal.
You can also validate third-party applications that were present on your Mac before you installed it.
Monitors both your Mac’s incoming and outgoing connections.

Highlights

Whenever LuLu detects that an application is trying to connect to a remote server, the application prompts you to authorize or not the requested connection.

Download link: https://github.com/objective-see/LuLu
System support: macOS

Hands Off

Hands Off have become one of the most complete Firewalls for Mac. With this tool, you can protect your computer by monitoring all internet connections in applications as well as for deciding whether or not to block each app. This application has regular updates and active support.

Key Features

This tool specifies which applications should be trusted with specific operations.
Prevents applications from calling home and blocks incoming and outgoing network connections.
Protects against Trojans, worms, and parasites on the network and it supports IPv4, IPv6, and local networks.
Can freely read, store or erase information on your computer without your knowledge.

Highlights

An application to monitor and control application access to your network and disks. Being able to monitor normally inconspicuous activities allows you to make informed decisions regarding the transfer of your private information, thus preventing the leakage of confidential information.

Download link: https://download.cnet.com/Hands-Off/3000-2144_4-75452437.html
System support: macOS
File size: 9.4 MB

NetGuard

NetGuard is an application that will allow you, application by application, to block internet access, being able to choose to block them so that they do not access the network when you are using Wi-Fi, data or both. This firewall has been available for a short time on Google Play after leaving beta.

Key Features

NetGuard is easy to use, it is an open-source project, it does not require root and it does not spy on the user.
In its free version, it supports IPv4 / IPv6 and TCP / UDP supports tethering, blocks system applications.
Notifies when an application accesses the Internet and records the use of the network by application per address.
In its Pro version (paid) is capable of records all outgoing traffic, searches and filters access attempts, exports PCAP files to analyze traffic.
Allows or blocks individual addresses per application, among other things.
NetGuard is capable of activating this block either on WiFi connections, on mobile networks, or both at the same time.

Highlights

Thanks to a new API available in Lollipop and higher versions of Android, NetGuard can redirect traffic from a specific application to a kind of “digital dump”, so that its connection to the Internet is interrupted.

Official link: https://www.netguard.me/
Download link: https://play.google.com/store/apps/details?id=eu.faircode.netguard
File size: 2.5 MB

TCPBlock

TCPBlock is a free firewall (better said port filter) that can either block individual programs or work according to the whitelist principle. This tool supports UDP and TCP over UDP filtering. If a blocked program wants to be released, the notification can also be sent via Growl.

Key Features

Mac Os Catalina

This wonderful firewall protects you from connections coming from outside your computer.
This tool helps you to prevent selected applications on your computer from opening connections to the network.
It helps to protect you from connections that come from outside of your computer.
Implemented as a loadable kernel module that contains all the blocking logic.
All configuration changes are made persistent in a configuration file on the hard drive.
You can prevent selected applications on your computer from opening a connection to the network.

Highlights

The software is operated via a system setting, here you can also ban all Internet connections globally. On request, it allows only selected programs to use the Internet and the tool is only suitable for experienced users.

Download link: https://download.cnet.com/TCPBlock/3000-10435_4-75326647.html
System software: macOS
File size: 1123 KB

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