NoSleep

r/nosleep is a subreddit dedicated to user-generated short horror stories. Rules of the community include that stories posted on the subreddit must be believable and that users must pretend that the stories are true. It has over 18 million members and is within the top fifty most popular subreddits. It has spawned an eponymous podcast called The NoSleep Podcast and multiple published novels, as well as film and television adaptations.