Inclusion Criteria:  (1) aged 18 and over, (2) fluent in spoken and written French, (3) meeting DSM-5 diagnostic criteria for at least one of the following anxiety disorders: Panic Disorder, Agoraphobia, Generalized Anxiety Disorder, Social Anxiety Disorder. The clinical assessment is based on a customized version of the Mini International Neuropsychiatric Interview (M.I.N.I.). (4) access to a computer or tablet connected to the internet with microphone and video camera  Exclusion Criteria:  (1) previous enrolment in the SMS intervention provided by Relief (2) active suicidal intentions, (3) severe depressive symptoms, (4) active substance-related and addictive disorder, (5) cognitive impairment