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Radio Silence is an outbound application firewall that lets you block Internet access from individual apps.


  • 100% Annoyance-free:
    Radio Silence respects your concentration. That is why it will never interrupt you with pop-up windows or alerts.
  • Zero Maintenance:
    Once Radio Silence is installed, you can forget all about it. It is always on and needs no attention from you.
  • Tiny and Fast:
    Radio Silence weighs next to nothing. It doesn't waste any time or resources, which also makes it blazingly more...

What's New

Version 1.0.3:
  • The free trial workflow is now more intuitive and fluid
  • Fixed minor localization issue in license registration


Mac OS X 10.6 or later

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Radio Silence User Discussion

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Mosenga Member IconReview+5

Cheapest alternative that Simply Blocks Apps to accessing internet.

You need only to add them to the Radio Silence list.

If you're not sure what to block with the Radio Silence firewall, you can use a network monitor to see which applications are making connections from your Mac.

Radio Silence has a network monitor called Private Eye. It's easy-to-use, and free of charge.
Private Eye requires OS X Lion or later.

Reply1 reply
Version 1.0.3

I forgot... OS X 10.9 and you can install Radio Silence on all the computers you have. The license is for your personal use, and is not tied to a single computer.

ShanilG Member IconReview+0

I have little snitch and radio silence and I personally prefer radio silence. Its simple, isnt intrusive and above all does what it says on the tin.

Reply0 replies
Version 1.0.3
B. Jefferson Le Blanc Member IconComment+648
B. Jefferson Le Blanc

There appear to be significant differences between Radio Silence and Little Snitch. With Radio Silence you choose the apps you don't want to phone home. This is fine if you are concerned about specific applications. Little Snitch, on the other hand, is far more granular, filtering all outbound traffic and asking you to set up a rule for each distinct instance. This can, indeed, be annoying. But it's far more thorough and, ultimately, provides a much higher level of monitoring and security. Which app is best for you depends, basically, on your level of paranoia. I've been using Little Snitch for years. While it can be annoying, it's important to realize that it's not Little Snitch that's causing the problem - its all the various apps and system functions that want or require internet access. The problem is inherent to the system. But if this is too much of a good thing for you, Radio Silence now offers an alternative, though it is less comprehensive. How effective either app is will depend on how you use it.

Reply1 reply
Version 1.0.2

Another advantage to Little Snitch's granularity is the ability to permit necessary network activity for an app, while simultaneously blocking the same app from extraneous connections. For example, a weather app may share personal info with the developer. Add that app to Radio Silence, and it won't be able to retrieve weather data. Little Snitch can specifically block all connections except those to weather data sites.

This advantage applies to a number of apps besides Little Snitch, such as Hands Off! and the free TCPBlock.

TCPBlock is IMO the best solution for those who don't yet need fine granularity control. It's simple to block all acitivity for individual apps, yet the capability is there if one eventually needs to block only some connections for a given app. Best of all, TCPBlock is free (although a donation is recommended).

Homelymatt Member IconComment+3

personally, I own both LittleSnitch and HandsOff...btw, the continuously popup/requests make me nuts...the weird thing is that not coming form apps that phone home, but from OS running his tasks...
Considering that RadioSilence is made just for blocking suspicious apps to call "outside", I think is a nice app...and the price is good for me.

Reply3 replies
Version 1.01

You sure are one easy mark. For 9 dollars you could have bought yourself a few beers and used the OS X firewall to do the same thing. LOL

That is a very humorous statement about the "continuously popup/requests make me nuts". Why didn't you deny or allow always so you do not get asked again! LOL

For 9 dollars I will sell you my lucky sock. It's guaranteed to smell bad and protect you against werewolves. LOL


Neither of the built-in firewalls can do what this product claims to do: block outgoing connections on a per-application basis.


I found Hands Off! to be the worst offender when it comes to nagging popups for routine OS X tasks. Little Snitch comes with rules for normal OS X processes, which can be disabled for the truly paranoid.

Even so, the dialogs stop once all OS X tasks have run at least once. At least, they do if you select rules to apply indefinitely.

WordWeaver Member IconComment+161

I wonder how Radio Silence compares to Little Snitch, which is over three times more expensive. Going by the looks of the above image alone, I suspect that Radio Silence may be considerably more simplistic/bare bones compared to Little Snitch. Of course, at this point, Little Snitch is a mature product, while Radio Silence isn't.

Reply1 reply
Version 1.01

Simplistic ≠ simple.

Fatcat Member IconComment+6

No trial period, no thanks...

Reply1 reply
Version 1.01
Radio Silence (Developer)

A free trial has just been added. Sorry that it wasn't available at first.

user icon+0
Version 1.0.3
user icon+0
Version 1.0.3
> 5 4


Current Version (1.x)


Downloads 3,176
Version Downloads 2,516
License Shareware
Date 14 Sep 2011
Platform Intel 64 / OS X / Intel 32
Price $9.00
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