Recent methodological reforms have succeeded in improving the rigor, accessibility, and transparency of psychological science, but these advances have not successfully proliferated certain subfields, including clinical psychology. Large-scale, crowdsourced collaborations offer clinical psychological scientists a way to conduct rigorous research on a scale not otherwise accessible to most researchers. The Psychological Science Accelerator (PSA) is an international collaborative network of psychological scientists that facilitates rigorous and generalizable research. In this chapter, we describe how the PSA can help clinical psychologists and clinical psychological science more broadly.