"The Oscar-winning documentarian is back, firing on all cylinders and reconnecting with his political muse. The result is easily his best documentary in years."
— Ed Gibbs, Little White Lies
"It's an undeniably informative and vital documentary, which clearly illustrates a disturbing political farce that has been allowed to thrive for far too long. Which is to say, at all."
— William Bibbiani, TheWrap
"Essential viewing for anyone needing a history lesson about Russia since the fall of the Soviet Union, and who wants a frontline report on the current geopolitical landscape in Europe, including Ukraine."
— G. Allen Johnson, San Francisco Chronicle
"Khodorkovsky is a charismatic subject with a still-mischievous twinkle in his eye even after serving ten years in a Siberian prison, making him a marvelously ambiguous antihero for documentary treatment."
— David Rooney, Hollywood Reporter
"[I]t is Gibney's film... that best tells this complex, contradictory tale of a businessman who rose from middle-class anonymity... to become one of Russia's richest men during the early days of Russia's post-Soviet experiment with capitalism."
— Michael O'Sullivan, Washington Post
"This is a study of power, and what power will do to survive; a study of how morality is more historically significant as a condition, and not a cause. The rich won’t save us — that’s what makes them rich. The fascinating Citizen K will leave you to determine the value in one of them saving themselves."
— David Ehrlich, IndieWire