This presentation, given by Toby Green, OECD's Head of Publishing at SSP Boston, May 2014, presents an alternative vision for Open Access publishing. It argues that, unlike Green and Gold OA, Freemium is both more inclusive of reader needs and requires audience-building to work. The key argument is that full-text content should be free to all but that reader-facing services that surround the content could be charged for and the income used to pay for the free service in the first place. This leaves funders and taxpayers with the choice of having to pay for publishing costs in contrast to Green and Gold where the funder or taxpayer must pay for publishing costs. Freemium means readers retain a financial lever and stake in scholarly publishing, something they don't have in Green and Gold. The presentation uses OECD Publishing's experience as a Freemium OA publisher as case study. It includes examples of OECD's free READ editions which readers are encouraged to share and embed in their websites and blogs so that viral marketing can support OECD's efforts to build a large audience for its publications and thereby underpin the freemium business model.