Bitmessage is a peer-to-peer, decentralized, encrypted system for exchanging long-form messages. Popular Science and CNET have both described Bitmessage as a secure alternative to email. In contrast to traditional email, with Bitmessage sender information cannot be forged. Bitmessage also incorporates a proof-of-work system to deter spammers and other bulk message senders. In addition to one-to-one messages, Bitmessage also supports "chans" that function much like email lists or Usenet groups. Currently, active chans cover the sorts of technical topics one might expect (online privacy, web development, Linux) as well as other topics of broader appeal (space science, chess, food, and recipes). Bitmessage is available for Windows, macOS, and Linux.