Professional evaluation engages the subject in a relation of truth to oneself and to others. Evaluating is attributing value to actions. This is a judgment made by peers and managers on the behavior of employees in companies. We wanted to start from the mobilization of the concept of parresia, the subject of a course at the college of France by Foucault,(1983) to question the dimension of the so-called truth in the context of professional evaluation. We test this concept from the study of a case, the real estate company 2.0. This case study reveals that evaluation is a form of daily control that takes multiple aspects in context. The formal moment of evaluation is simply a staging of judgments, points of view and other criticisms of the behavior of the collaborator. We conclude by developing research leads and a perspective on the ethics of evaluation.