Medium is an online publishing platform developed by Twitter co-founder Evan Williams, and launched in August 2012. It is legally owned by A Medium Corporation. The platform is an example of evolved social journalism, having a hybrid collection of amateur and professional people and publications, or exclusive blogs or publishers on Medium and is regularly regarded as a blog host.
Williams developed Medium as a way to publish writings and documents longer than Twitter's 140-character maximum. It eventually grew into a separate platform independent of Twitter's brand.
Medium also has its own publications, including the online music magazine Cuepoint, edited by Jonathan Shecter; NewCo Shift, led by entrepreneur, author, and journalist John Battelle; and the technology publication, Backchannel, edited by Steven Levy.