Objective: To evaluate different recruitment methods to enroll participants into a mHealth pilot RCT: banner ads on Facebook and OkCupid, and targeted electronic outreach (e.g., emails to community-based organizations and to professors at local colleges). Participants: Between October 2015 and May 2016, 114 college-aged Black and Latina women 18 to 24 participated in the study. Methods: Recruitment methods compared online banner ads on social media to targeted electronic outreach. Individual banner ad images were compared by impressions, clicks, and cost by enrolled participants. Results: More targeted electronic recruited participants enrolled than via banner advertisements. Banner ads with images of women yielded a higher click-through-rate and was more cost effective versus the logo alone. Conclusions: Recruiting young women of color may be facilitated through known and trusted adults, such as college professors, rather than through anonymous banner advertisements on social media.