Factcheck.org is a nonpartisan, nonprofit "consumer advocate." Factcheck.org is a project of the Annenberg Public Policy Center of the University of Pennsylvania. It aims to reduce the level of deception and confusion in U.S. politics by monitoring what politicians claim in TV ads, debates, speeches, interviews, and news releases.

The International Fact-Checking Network is a unit of the Poynter Institute dedicated to bringing together fact-checkers worldwide.

Politifact is a fact checking source owned by the Poynter Institute for Media Studies. Politifact focuses on statements and claims made by politicians and rates them for accuracy. This fact checking site is run by editors and journalists and aims to present true facts unaffected by agenda or bias.

Snopes in an evidence-based fact checking source aimed at highlighting the process of confirming information using research and reliable sources. Snopes does not focus solely on political information, rather any information that readers submit or have questions on. It is a good source for keeping up to date on current fact-checks.

The Washington Post Fact Checker started as a column by Glenn Kessler in 2007 as a feature during the 2008 presidential campaign. It's purpose is to determine truth in statements made by political figures on important topics. It also seeks to explain difficult issues, provide missing context, and explain misleading or vague language used by politicians in order to veil or disguise true meaning.

Media Bias/Fact Check (MBFC), founded in 2015, is an independent online media outlet. MBFC is dedicated to educating the public on media bias and deceptive news practices. Objective: MBFC determines the bias of media and information sources as well as the level of overall factual reporting through a combination of objective measures and subjective analysis through the use of our stated methodology. MBFC also provides occasional fact checks, original articles on media bias, and breaking/important news stories, especially as it relates to USA politics.