RAINN | 20,214 followers on LinkedIn. Nation's largest anti-sexual violence organization. Created & operates the National Sexual Assault Hotline: 800.656.4673 | RAINN is the nation’s largest anti-sexual violence organization and the leading authority on sexual violence. We are a dynamic organization focused on victim services, public education, public policy, and consulting services. Our team develops and operates best-in-class services for survivors, informs and educates the nation about sexual violence, and improves the public policy and criminal justice response to these crimes.