This fact-checker says it “uses the Trendolizer engine to quickly detect trending hoaxes from hundreds of known fake news sites, satirical websites and prank generators. Now and then we also write about other interesting things that are trending online.” Facebook hired Lead Stories to help curb the platform’s disinformation problem after the 2016 election.

The Post’s fact-checking column first started on Sept. 19, 2007, as a feature during the 2008 presidential campaign. The Washington Post revived it as a permanent feature on Jan. 11, 2011, helmed by Glenn Kessler. Other members of The Fact Checker team are Salvador Rizzo and Meg Kelly.

This fact-checker says it is a “nonpartisan, nonprofit ‘consumer advocate’ for voters that aims to reduce the level of deception and confusion in U.S. politics. We monitor the factual accuracy of what is said by major U.S. political players in the form of TV ads, debates, speeches, interviews and news releases. Our goal is to apply the best practices of both journalism and scholarship, and to increase public knowledge and understanding.”

According to the site, “Fact-checking journalism is the heart of PolitiFact. Our core principles are independence, transparency, fairness, thorough reporting and clear writing. The reason we publish is to give citizens the information they need to govern themselves in a democracy. PolitiFact is owned by the nonprofit Poynter Institute for Media Studies. PolitiFact had been owned by the Tampa Bay Times, but in 2018 direct ownership of PolitiFact was transferred from the Times to Poynter, which is the newspaper’s parent company. The move allows PolitiFact to function fully as not-for-profit national news organization.”

Fact checks and News Analysis from The New York Times. According to the paper, “Like The Washington Post and the two big pioneering fact-checking organizations — Politifact and Factcheck.org — The Times has a longstanding commitment to sifting out the most strikingly questionable assertions made by political figures. We have a reporter, Linda Qiu, a veteran of Politifact, who does fact-checking full time. And we pull together ad hoc truth squads as necessary for big events like the State of the Union address and presidential debates.”

Fact-checking and accountability journalism from AP journalists around the globe. The AP is a third-party fact-checker for Facebook and has recently expanded to covering false videos and images. According to Poynter, “The wire service announced [in April 2019] that it will start debunking false content in Spanish for its American audience. The outlet will also publish corresponding fact checks in Spanish, making it the first of Facebook’s American partners to do so.”

According to its website, “The International Fact-Checking Network is a unit of the Poynter Institute dedicated to bringing together fact-checkers worldwide. The IFCN was launched in September 2015 to support a booming crop of fact-checking initiatives by promoting best practices and exchanges in this field.”

On its website mission statement, the fact-checking and hoax-debunking site says, “When misinformation obscures the truth and readers don’t know what to trust, Snopes.com’s fact checking and original, investigative reporting lights the way to evidence-based and contextualized analysis. We always document our sources so readers are empowered to do independent research and make up their own minds.” Snopes had been a third-party fact-checker for Facebook, but withdrew its partnership in February 2019, saying it had stretched its limited resources.

While not a fact-checker per se, this online resource can help readers do their own research and determine whether a report is biased. According to the site, “All Sides exposes people to information and ideas from all sides of the political spectrum so they can better understand the world — and each other. Our balanced news coverage, media bias ratings, civil dialogue opportunities, and technology platform are available for everyone and can be integrated by schools, nonprofits, media companies, and more.”

According to its website, “PunditFact is a project of the Tampa Bay Times and the Poynter Institute, dedicated to checking the accuracy of claims by pundits, columnists, bloggers, political analysts, the hosts and guests of talk shows, and other members of the media. We define a pundit as someone who offers analysis or opinions on the news, particularly politics and public policy. One can engage in punditry by writing, blogging or appearing on radio or TV. A pundit is not an elected official, not a declared candidate nor anyone in an official capacity with a political party, campaign or government.”

Check Your Fact is a fact-checking website by The Daily Caller, a conservative website. However, Check Your Fact says in its mission statement it does not take sides. “Our mission is a non-partisan one. We're loyal to neither people nor parties -- only the truth. And while the fact-checking industry continues to grow, there are still countless assertions that go unchecked. We exist to fill in the gaps.”

This is his bio on CNN.com: “Daniel Dale is a reporter in CNN's Washington Bureau, where he fact-checks President Trump, 2020 presidential candidates and others. Prior to joining CNN, Dale spent over a decade at the Toronto Star, including as Washington Bureau Chief from 2015 to 2019, where he was the first journalist to fact-check every false statement from Trump.”