Proteus Fund

Philanthropic Fundraising ServicesMassachusetts, United States51-200 Employees

Proteus Fund is a philanthropic organization that links donor giving to on-the-ground social justice work. It analyzes opportunities, gaps, and challenges facing movement organizations, especially at state and local levels, and mobilizes support to address them. The group operates donor collaboratives that align flexible philanthropy with evolving social justice movements to produce durable impact, and it also provides fiscal sponsorship to support associated initiatives within the broader ecosystem of social change.

Serving movement groups, advocacy networks, and funders dedicated to racial, gender, queer, and disability justice and an inclusive democracy, Proteus Fund positions itself within the philanthropic fundraising services space as a conduit between donors and grassroots efforts. Based in Amherst, Massachusetts, the organization maintains offices in New York City and the Boston metro area, with staff dispersed across the United States. A recent development includes a 2025 collaboration with Action Network to support a community discussion on the rule of law.

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