Claim: Reddit witnessed 82.54 billion users viewing its pages in 2015.

Reddit -LRB- stylized as reddit , -LSB- ˈrɛdɪt -RSB- -RRB- is an American social news aggregation , web content rating , and discussion website . Reddit 's registered community members can submit content such as text posts or direct links . Registered users can then vote submissions up or down that determines their position on the page . Submissions with the most up-votes appear on the front page or the top of a category . Content entries are organized by areas of interest called `` subreddits '' . Subreddit topics include news , science , gaming , movies , music , books , fitness , food , image-sharing , and many others . The site prohibits harassment , and moderation requires substantial resources .   As of 2017 , Reddit had 542 million monthly visitors -LRB- 234 million unique users -RRB- , ranking # 4 most visited web-site in US and # 9 in the world . Across 2015 , Reddit saw 82.54 billion pageviews , 73.15 million submissions , 725.85 million comments , and 6.89 billion upvotes from its users .   Reddit was founded by University of Virginia roommates Steve Huffman and Alexis Ohanian in 2005 . Condé Nast Publications acquired the site in October 2006 . Reddit became a direct subsidiary of Condé Nast 's parent company , Advance Publications , in September 2011 . As of August 2012 , Reddit operates as an independent entity , although Advance is still its largest shareholder . Reddit is based in San Francisco , California . In October 2014 , Reddit raised $ 50 million in a funding round led by Sam Altman and including investors Marc Andreessen , Peter Thiel , Ron Conway , Snoop Dogg , and Jared Leto . Their investment saw the company valued at $ 500 million .