The term 'exso' refers to a past (ex) significant other (so). The site features in-depth reviews of former relationships from the perspective of one, or both, of the participants. Relationship themed electronic greeting cards allow lovers everywhere to express their feelings.

Personal relationships often end hastily with both parties emotional and angry. exso reviews and exsoCards allow people to convey their feelings once the emotional sting has subsided. The exso experience has been described by users as cathartic. Reviews can encourage users to do some self-reflection. The outside perspective from one or more exsos can often be invaluable to our personal growth