In 2012, PubPeer’s founders created a website dedicated to anonymous post-publication peer review of scientific scholarship. They built anonymity into the website to allow scientists to discover the flaws in their peers’ research without having to fear that those same peers would retaliate. In its short lifespan, PubPeer has already been a tremendous success; its users have discovered flaws in high-profile research, leading to many corrections and even retractions.