BitlBee is an IRC to Instant Messaging gateway that allows users to access a variety of IM services from inside their IRC client. Currently, BitlBee includes built-in support for XMPP/Jabber (including Google Talk and Hipchat), ICQ, and Twitter. Plugins are available to add support for Facebook, Steam, Discord, and Mastodon. Users may opt to run BitlBee on their own computer or may use one of the servers listed in the public servers directory. After connecting their IRC client to an instance of BitlBee, the built-in help system will prompt users with instructions for adding their instant messaging accounts. Alternately, the BitlBee User Guide linked from the BitlBee front page also provides detailed setup instructions. After IM accounts are configured, users can chat with their IM contacts just as they would normally chat with another IRC user. BitlBee is included in the package repositories for most Linux distributions and in the ports collections for the major BSDs. macOS users can install it using MacPorts, Homebrew, or Nix. BitlBee is free software, distributed under the GNU General Public License, with source code available on the BitlBee website.