Apps phoning home?
Not on your watch.

Radio Silence is a tiny firewall that lets you block any application from accessing the internet.

It runs on all versions of OS X from El Capitan to Snow Leopard. Radio Silence is made for people who don't want to spend time configuring complex firewalls. You can set it up in a few seconds and then never think about it again.

Buy now for only $9  $15 
You save 40%!
Download (Includes free trial)

Radio Silence has a risk-free 30-day guarantee. If you're not absolutely happy, you'll get your money back, no questions asked.

The Radio Silence firewall blocks outgoing connections

What makes Radio Silence a great firewall?

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 the firewall 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 fast.

Usable by Anyone

You don't have to be a network expert to use this firewall. It takes care of all the technical details for you.

A firewall that people actually like?


“A lot of apps secretly check in with the mothership behind the scenes without asking your permission. If you'd prefer they didn't, Radio Silence can solve your problem hassle-free.”

Macworld gave Radio Silence 4 out of 5 mice It is perhaps the easiest firewall I’ve ever used.

LogicielMac gave Radio Silence 4.5 stars Editor's rating LogicielMac gave Radio Silence 4.5 stars Average user rating

Love For Tech

“A hassle-free, and cheaper, alternative to its cousin Little Snitch.”

Comments from customer emails

"I love your app Radio Silence. It's great in the same way Apple-made apps are great: fantastic minimalism, great interface, no-nonsense."
"Awesome app."
"I just bought Radio Silence and love it!"
"It does exactly what I was looking for! Thank you again for a fantastic product!"
"A really nice app!"
"Your software is awesome!"
"WOW... you guys ROCK!"
"I've been using Radio Silence for a while now and wanted to say thanks. It's cool!"
"Great app, thanks!"
"I'm very sorry for the trouble, but I would like to take you up on the 30 day refund policy. I think Radio Silence is a very nice app, it's just not what I needed right now." (Full refund sent within two hours, no hard feelings!)

Not sure if Radio Silence is for you?

It's hard to please everyone. Thousands of people are happy with
Radio Silence, but maybe you need something different.

That's why Radio Silence has a full 30-day money-back guarantee.
If you're not happy, just send an email and you'll get a full refund.
No questions asked. No hassle or arguments. No risk.

Buy now for only $9  $15 
You save 40%!