Darcy co-authored a small study published this week in the that demonstrated Woebot can reduce symptoms of depression in two weeks.
Woebot's programming, meanwhile, is playful and educational.
On your second day using the service, after you answer a few initial questions, he'll ask to play a word game.
Their promise of helping people identify patterns as well as learn and practice new skills, he says, is clear.
Yet the risk of overselling the benefits of a chatbot, or even doing harm to someone who's not getting help they desperately need, remains a major concern.
That dismal treatment rate has to do with cost, logistics, stigma, and being poorly matched with a professional.