Wikimedia Foundation, et al. v. National Security Agency, et al. was a lawsuit filed by the American Civil Liberties Union (ACLU) on behalf of the Wikimedia Foundation and several other organizations against the National Security Agency (NSA), the United States Department of Justice (DOJ), and other named individuals, alleging mass surveillance of Wikipedia users carried out by the NSA.

[9] The original plaintiffs besides the Wikimedia Foundation were the National Association of Criminal Defense Lawyers, Human Rights Watch, Amnesty International USA, the PEN American Center, the Global Fund for Women, The Nation magazine,[10] the Rutherford Institute, and the Washington Office on Latin America.

[13] Since Clapper, the government itself has confirmed many of the key facts about NSA's Upstream surveillance, including that it conducts suspicionless searches.

[14] ACLU attorney Patrick Toomey noted the lawsuit is particularly relevant as the plaintiffs engage in "hundreds of billions of international communications" annually.

[14][15] On August 6, 2015, the defendants (National Security Agency, et al.) brought a motion to dismiss, arguing that the plaintiffs have not plausibly shown that they have been injured by Upstream collection of data and thus lack standing to sue.

US District Judge T. S. Ellis III ruled that the plaintiffs could not plausibly prove they were subject to Upstream surveillance, echoing the 2013 decision in Clapper v. Amnesty International US.