Facilitated by the increased availability of affordable broadband Internet, individuals around the world are taking language lessons online from private tutors. A large proportion of online language tutoring takes place through online teaching platforms (OTPs), which are two-sided online markets that connect individual learners and tutors for piece-meal lessons. This paper considers how salient aspects of teachers' identities drives teacher selection on OTPs. Using a discrete choice experiment design (N = 971) distributed to online English learners from four countries, (Brazil, Italy, Spain and Korea) the paper tests hypotheses related to linguistic, racial and gender-based discrimination. The results reveal that participants' preference for L1 teachers far exceeds their preference for pedagogically qualified instructors and that learners prefer female to male teachers. Further, learners' preference for L1 teachers is stronger when the teacher is White than when the teacher is Black. The results also indicate that foreign media consumption correlates with reduced racial bias. Implications and suggestions for further research are discussed.