Cryptodog is a community-developed fork of the original Cryptocat browser extension, which was discontinued in February 2016.

We offer two things:


The original Cryptocat had its flaws, but it also had many redeeming qualities. The ability to adopt ephemeral identities and have off-the-record conversations in transient rooms was a powerful feature; it was what attracted many of us to Cryptocat in the first place. Very few other chat programs today combine usability, pseudonymity, and privacy as well as Cryptocat did.

Given that no comprehensive alternative currently exists, we feel it's worthwhile to provide these features in Cryptodog for those who want them.

If you're looking for a secure desktop messenger and don't care about group chat or username ephemerality, we recommend Nadim Kobeissi's Cryptocat rewrite. It's a cross-platform desktop app that uses XMPP and the OMEMO encryption protocol.

Otherwise, you can expect continued service from Cryptodog for the forseeable future.

Client Modifications


Before using Cryptodog, please make sure you understand the security implications. This is not to be taken lightly.

The recommended way to run Cryptodog is via our Chrome/Chromium extension. This ensures you always have the official, most recent version. A Firefox extension will be released in the near future.

If you don't care about that and just want to test out Cryptodog, we have a hosted client on GitHub Pages. You should be able to access it from most mobile browsers as well.

Or, if you prefer the stock Cryptocat extension, that's fine too. The official Cryptocat addon is compatible with our server. Just enter this information in the "Custom server" dialog:

All of our source code is on GitHub.


Issues and pull requests should be posted to the GitHub repository.