Research suggests coaches play a central role in establishing a context conducive to concussion reporting, particularly via direct verbal communication about concussion. Informed by qualitative interviews and stakeholder feedback, we developed a web-based concussion education platform for collegiate coaches (GoHuddle). The goal of GoHuddle is to encourage concussion safety-supportive coach communication using behavioral modeling and experiential learning. We then conducted a pre-post survey study to examine the impact of engaging with the platform on coach concussion communication, with outcomes of: (a) expected likelihood of communicating with athletes about concussive symptom reporting; (b) expected likelihood of pressuring medical staff to return athletes to play; and (c) belief in the usefulness of engaging in the communication described in a and b (i.e., response efficacy). We also assessed feasibility and acceptability of the platform in the collegiate sport context. The platform was sent to 435 coaches at five institutions, and 334 (77%) completed surveys (70% male, 37.8 years mean age). After completing GoHuddle, coaches had 2.5 greater odds of expecting to discuss concussion with their team (odds ratio [OR] 2.53, p < 0.001). Response efficacy for talking about concussion also increased significantly post-intervention (OR 3.78, p < 0.001). No significant change was seen in expectancies regarding pressure on medical staff to return athletes to play "as soon as possible." A high proportion (82%) of coaches would recommend this platform for coach concussion education. In conclusion, this study suggests GoHuddle is a feasible and acceptable approach to coach concussion education, and use of this platform holds promise for shifting coach communication about concussion.