Start new cyph
Start a private conversation with
anyone, in 30 seconds

Military-grade encryption

To crack a single Cyph message would take longer than the age of the universe.

(That's even if you had the fastest supercomputer on Earth.)

Authenticated messaging

With Cyph, you can be sure you're talking to whom you think you're talking to, thanks to the Socialist Millionaire Protocol.

Send photos

Your photos are safe, and that's a great feeling. You don't have to worry about "The Cyphoning".

Coming Soon

Voice and video calling

Photos are one thing, but it would suck to have these leaked.

Send cash

Through the awesome power of Bitcoin, you can cyph anyone a quid privately and securely.

Cyph anonymously with Tor

Need to hide the fact that you're even using Cyph? Good news! We're getting ready to roll out our very own Onion site!

No Registration Required

Click the button at the top of your screen to cyph right now!

Why Cyph?

Encryption is hard, but using it shouldn’t be. We believe everyone deserves privacy, not only security experts.

Cyph is a next-generation messenger app that makes privacy the new status quo.

With Cyph, never again will you need to ask someone else to install or configure or sign up for anything, when all you need is a one-off private discussion.

One click and you’re secure.


About Cyph

Encryption is hard, but using it shouldn’t be. We believe everyone deserves privacy, not only security experts.

Cyph is a next-generation messenger app that makes privacy the new status quo.

With Cyph, never again will you need to ask someone else to install or configure or sign up for anything, when all you need is a one-off private discussion.

One click and you’re secure.

Our Story

Cyph was founded by two former SpaceX engineers to meet their own high standards of what chat should be: completely private and delightfully dope.

Ryan Lester
Baron Joshua Cyrus Boehm

We've been friends since we first met 17 years ago, and we've since spent a lot of time working together over the years – most recently for Elon Musk on a small team at SpaceX.

The two of us have always been pretty big on keeping private things private, which turns out not to be a trivial goal. Even ignoring government surveillance, the issue is fundamentally the same: sending data openly through the Internet involves trusting a lot of random strangers.

Over time, we'd variously used PGP, Pidgin OTR, and a number of different encrypted chat services; and never been quite satisfied.

We knew there had to be a better way, that a future where everyone could have privacy was possible.

So, we created Cyph.

I'm sorry, but your cyph is in another castle...

Reasons why you may have landed here:

  • A glitch in the matrix
  • You're just guessing random URLs
  • We broke something
Frequently Asked Questions
  • Dear Cyph, what's coming soon?

    Threat model, design specs / how it works, and a FAQ page with more than one question. Stay tuned!

Terms of Service

Gonna update this later, but for now let's just say that you can't sue us or murder us for any reason and we make no guarantees about anything.

(It's not like anyone will ever read this anyway.)

Privacy Policy

Gonna update this pretty soon (unlike the ToS, this is actually kind of important considering what we do), but the main things are:

  • Our corporate site / landing page has Google Analytics included
  • Our actual app briefly loads Google Analytics in a sandboxed iframe then deletes the iframe after 10 seconds
  • Our backend keeps track of: total cyphs started, total number of messages sent, total beta invite list signups
  • Our server keeps a log of all incoming requests
  • We absolutely, 100%, NEVER and NEVER WILL ever send or store plaintext versions of your encrypted data
  • Obligatory canary: we have not been approached by any government with a request to backdoor our code