Mass Alliance is on the 4th floor of 8 Beacon Street. It was founded in 2005 to support and endorse progressive candidates for political office. Mass Alliance has 22 member organizations which include groups working to support feminism, teachers, reproductive choice and the environment. Mass Alliance is not affiliated with a political party. It is a nonprofit supported by its member organizations and individual donations. Around 800 people currently donate to Mass Alliance. Mass Alliance is run by two full-time staff members and many interns.