Wysa is an example of a conversational program that offers cognitive-behavioral exercises between visits with a person. It is support, not a therapist, and it is not a crisis service. Someone at immediate risk needs local emergency care or a crisis line, not a chatbot. Health systems that offer a tool like this still need a path to a human.
REACH VET is a U.S. Veterans Health Administration program. A statistical model flags veterans in a very small top tier of risk each month, and a clinician who knows the patient reviews the chart and makes contact. Identification is not a diagnosis of suicidal intent. The program exists to prompt a human conversation and a look at whether care should change.