How trustworthy is an online retailer? How reliable is a carpooling service? Internet users can use the 'Trustami' software to get a comprehensive overview of the reputation of the service or goods provider or customer. Participants who want to create a score for themselves use the service to collate information from various portals and social media of their choice. The Trustami score converts this information into a rating and thus provides information about the trustworthiness of the user at a glance. Both buyers and sellers can create a corresponding trust badge for themselves and integrate it into their own website or profile.