Marie Mentorin is a relationship and personal-development brand founded by Marie Heindl, focused on helping men build self-confidence, communicate more clearly and take an active role in their lives and relationships. Through her work on “masculine self-efficacy,” Marie aims to help men move beyond simply functioning and reconnect with what they want, think and value. She presents her approach as direct and practical, drawing on years of listening to men and explaining women’s perspectives.

The brand offers several ways to learn and get support, including a free masterclass, the Marie Mentorin podcast, the book Machs ihr richtig, the Männerzirkel group program, and one-to-one work. The group and individual programs are available by application. Marie’s M³ method is described as a path from functioning to taking the lead. The website also features testimonials from clients who describe changes in confidence, self-understanding and relationships. Marie reports that thousands of men have attended her masterclass and hundreds have worked with her personally.