Communities across the United States are working to improve community-based mental health crisis response, with 1 goal being to reduce criminal legal system involvement among individuals with mental illnesses, behavioral disorders, or mental health crises. Existing and recently developed models can generally be divided into non-law enforcement-based response models and law enforcement-based response models. Wide variation exists in terms of staffing, how response teams are called out or dispatched, hours of operation and immediacy of response, and approaches to crisis resolution.