Psychotherapists are educated in a private institute, unlike psychologists who are university-educated. Some might say that psychology is theory, while psychotherapy is practice.
A psychotherapist has both education and experience, similar to a psychologist, in treating issues such as anxiety, stress, depression, and low self-esteem. However, a psychotherapist is not trained to make clinical diagnoses. Another significant difference is that, as a mandatory part of their training, psychotherapists have undergone therapy themselves and worked on their own issues.