• The Offices of the Provost, the Dean of Research, and the Dean of Humanities and Science, Stanford University
• The SEP Library Fund: with contributions from the National Endowment for the Humanities and the membership dues of academic and research libraries that have joined SEPIA.
• The Friedrich Hayek Fund & The SEP Fund: with contributions from private donors and individual readers.

The SEP gratefully acknowledges founding support from the National Endowment for the Humanities, the National Science Foundation, The American Philosophical Association/Pacific Division, The Canadian Philosophical Association, and the Philosophy Documentation Center. Current fundraising efforts are being supported with a grant from The William and Flora Hewlett Foundation.