Ali H. Soufan (born 1971) is a Lebanese-American former FBI agent who was involved in a number of high-profile anti-terrorism cases both in the United States and around the world.

A 2006 New Yorker article described Soufan as coming closer than anyone to preventing the September 11 attacks and implied that he would have succeeded had the CIA been willing to share information with him.

Here he discovered a box of documents delivered by Jordanian intelligence officials prior to the investigation, sitting on the floor of the CIA station, which contained maps showing the bomb sites.

[2] When given a transcript of the interrogations of Fahd al-Quso, he noticed a reference to a one-legged Afghan named "Khallad", whom he remembered as a source identified years earlier as Walid bin 'Attash; this helped the FBI to track down Abd al-Rahim al-Nashiri.

[7] Colleagues reported that he would sit on the floor with suspects, offer them tea, and argue over religion and politics in fluent Arabic, while drawing out information.

[6] In 2005, Soufan approached a Florida doctor, Rafiq Abdus Sabir, pretending to be an Islamist militant, and asked him whether he would provide medical treatment to wounded al-Qaeda fighters in the Iraq War.

[12][13] He also obtained a confession from Ali al-Bahlul, an al-Qaeda propagandist and bin Laden media secretary accused of making a video celebrating the Cole attacks, and testified at his military tribunal as well.

Soufan's statement contradicts the one made in the "torture memos", which were intent on making a legal case in favor of—and justification for—the use of waterboarding and other so-called "enhanced interrogation techniques" (EITs).

Soufan re-stated his claims in an April 22, 2009, op-ed for The New York Times entitled "My Tortured Decision",[19] which was published shortly after the memos were released, and similarly two months later.

The Department of Justice's Office of Professional Responsibility report,[24] published July 29, 2009, states that "the CIA Effectiveness Memo provided inaccurate information about Abu Zubaydah's interrogation."

Soufan strongly disputed Rodriguez's claims that the CIA's enhanced interrogation program was effective at securing reliable, useful information.

[30] Cybersecurity experts hired by the Soufan Group determined the social media threats were orchestrated not by al-Qaeda, as the CIA claimed, but by the same Saudi government officials who had targeted his friend Jamal Khashoggi, prior to assassinating him.