Effectiveness
Real effects, measured in thousands of people
A systematic review with meta-analysis published in npj Digital Medicine brought together 39 randomised controlled trials of chatbots for mental health. Across more than 7,400 participants for depression and 7,600 for anxiety, the chatbots produced statistically significant reductions in symptoms compared with control groups.
The effects are small in size, no digital tool replaces psychotherapy and psAico does not claim to, but they are real and replicated, and they are clearer in people who start from more intense distress. For a tool designed to be there alongside people day by day, that is a good place to start.

