An NDI-published white paper examining how Free and Open Source (FOSS) public interest technology is essential to combatting digital authoritarianism and supporting democracy. The white paper draws on NDI’s programmatic expertise, as well as research and interviews with key leaders in the Internet Freedom space. It elaborates on the crisis faced in keeping democracy advocates safe online, outlines the challenges of the internet freedom technology “life cycle,” and identifies lessons learned about coordination, long-term financial sustainability, and technical support to inform the democracy community. The paper concludes with a road map towards building a sustainable public interest internet freedom technology infrastructure, including recommendations for governments, donors, implementers, and technologists.