Pitchr is Gythr's call for speakers: a branded public page where prospective speakers submit proposals, and a review workspace where you and your committee score and decide. Accepted talks flow straight into your speaker roster and schedule, so nobody re-keys anything. (You may still see it labeled Call for Proposals or CFP in a few places, it is the same tool.)
This guide covers setting up your call. See Review and choose your speakers for the review side, and Submit and track your proposal for what your speakers see.