Bit Chat

Get a secure, peer-to-peer instant messenger

One messenger for Internet and LAN chat with end-to-end encryption

Version 4.6.3 (alpha)

NOTICE: Bit Chat has been discontinued on Nov 11, 2019 and will be replaced by Mesh IM which will be available soon. Only new Bit Chat profile registerations are affected while users who already have registered profiles can keep using them with Bit Chat until they expire.
Windows 10/8.1/8/7/Vista
(.NET Framework v4.0 required)
Ubuntu Linux
(Mono Framework required)
Quick Start
Read this blog post to know how to register for a profile certificate and get started with Bit Chat.
What's New?
Read this blog post to know what's new in this release.
Open Source
Source code available under GNU GPLv3 Licence on  GitHub
File Details
FormatZIP File
Size850 KB
FormatZIP File
Size464 KB
FormatGZiped TAR Archive
Size452 KB
Technitium Bit Chat Screen Shot

Technitium Bit Chat is a secure, peer-to-peer (p2p), open source instant messenger designed to provide end-to-end encryption. Primary aim of developing this instant messenger is to provide privacy which is achieved using strong cryptography. It can be used over Internet and private LAN networks for instant messaging and file transfer.

The architecture is designed keeping in mind the security principle that everybody is secure or no one is. There is no meta data generated when you use Bit Chat. The only thing that we know, is the email address of the user who registered for a digital certificate. The digital certificate tells that the email address was verified, which is similar to, in concept, to any domain validated SSL certificates issued to websites.

To know more, read this blog post.

Click here to read Frequently Asked Questions (FAQ).

Click here to read Bit Chat whitepaper.


  • Works similar to a bit-torrent client so, no servers involved!
  • No meta data is stored since even we don't know to whom you are chatting with.
  • Works as LAN chat just as it works on the Internet.
  • Can work in private LAN networks not connected to Internet.


  • Profile certificate signed with RSA-4096 and SHA-256 hash ensures identity of opposite peer.
  • Provides end-to-end encryption with Perfect Forward Secrecy (PFS) using DHE-2048 or ECDHE-256.
  • Protocol is secured with AES 256-bit encryption.
  • Open source code allows you to inspect the implementation.

Why Is Privacy Important?

Watch this episode of Last Week Tonight with John Oliver: Government Surveillance (HBO) in which John sits down with Edward Snowden to discuss the NSA, the balance between privacy and security, and dick-pics. You may wish to skip to 13:38 in the video to jump to the interview.

"Your rights matter because you never know when you're going to need them."
- Edward Snowden

Alpha Version

Technitium Bit Chat current release is in alpha version. This means the software is not fully complete and will undergo major changes in its protocol or user interface design. There may be noticable bugs which will be addressed with an automatic update. You are welcome to report any issues by sending an email to

Read More

Read more on the original concept in this blog post.