Rigorous and transparent open Request for Proposals (RFP) processes are one strategy grantmakers can use to source, vet and select high-potential grantees. Done well, RFPs can introduce funders to new ideas and grantees while fostering more equitable and effective grantmaking. Education First, with support from the Chan Zuckerberg Initiative, sought to uncover best practices for implementing open RFPs and avoiding common pitfalls. We’ve compiled those best practices into this primer, which outline key question for funders to consider when designing, launching and managing open RFPs. The purpose of this primer is to help foundations implement open RFPs in a way that prioritizes equity and transparency while ensuring a high-quality experience for grantees.