APA is the leading scientific and professional organization representing psychology in the United States, with more than 146,000 researchers, educators, clinicians, consultants, and students as its members.

ASPPB is the alliance of state, provincial, and territorial agencies responsible for the licensure and certification of psychologists throughout the United States and Canada. ASPPB was founded in 1961 as the American Association of State Psychology Boards. It was the product of the American Psychological Association (APA) Board of Professional Affairs Committee on State Licensure.

ABPP serves the public by promoting the provision of quality psychological services through the examination and certification of professional psychologists engaged in specialty practice.

The ACA "is a not-for-profit, professional and educational organization that is dedicated to the growth and enhancement of the counseling profession. Founded in 1952, ACA is the world's largest association exclusively representing professional counselors in various practice settings."

This non-profit organization is "the premier credentialing body for counselors, ensuring that counselors who become nationally certified have achieved the highest standard of practice through education, examination, supervision, experience, and ethical guidelines.