WOT allows users to add their input on the trustworthiness, vendor reliability, privacy and/or child safety of a website based on their experience with the site and/or services they offer. The rating scale ranges from poor to excellent and is algorithmic. WOT calculates the reputation of a website through a combination of user ratings and data from trusted sources such as Panda Security, PhishTank, TRUSTe and hpHosts.