As of August 2018, 1,035 AllSides readers agreed that AlterNet has a Left media bias.
AlterNet issued a press release in April 2018 calling itself "a pioneer and leader in progressive online journalism." The site's stated mission is “to inspire citizen action and advocacy on the environment, human rights and civil liberties, social justice, media and health care issues."
Wikipedia calls AlterNet an "activist news service and a project of the non-profit Independent Media Institute."
AlterNet.org states that is is "an award-winning news magazine and online community that creates original journalism and amplifies the best of hundreds of other independent media sources. AlterNet’s aim is to inspire action and advocacy on the environment, human rights and civil liberties, social justice, media, health care issues, and more."