There is often overlap between these terms, and their meanings and licensing requirements vary depending on the regulations of the country where the practitioner is based. I recommend looking at someone’s educational background to fully understand their profession and approach. That being said, here’s a general overview:

• A psychologist is someone who holds a psychology degree. The term is often used to refer to someone who has specialized in treating mental health conditions, but that’s just one of the many branches of psychology! There are psychologists who provide therapy, and there are others who do academic research.
• A clinical psychologist is a type of psychologist who specializes in diagnosing and treating mental health conditions. They typically see more “severe” cases.
• A psychiatrist has studied medicine and specializes in psychiatry, the branch of medicine that focuses on diagnosing and treating mental health conditions. They are the only mental health professional qualified to prescribe medication.
• A psychotherapist is someone who has extensive training in treating mental health. In some countries, it is used interchangeably with “therapist” or “psychologist”, but in others, “psychotherapist” is a protected title, only accessible to those who have completed specific post-masters training.
• A therapist is a broad term for someone who provides therapy to individuals, couples or groups. They might come from various training backgrounds such as psychology, counseling, social work, or other therapeutic modalities.
• A counselor is a professional who provides guidance and support to individuals or groups dealing with emotional, psychological, or social issues.
• A coach is someone who helps individuals set and achieve personal goals, often around behavior change, performance, or personal development. They usually don’t have formal education to treat mental health conditions but have certifications from coaching organizations.