Upon its release at Cannes, the film was met with critical acclaim. On the review aggregation website
Rotten Tomatoes, the film has an approval rating of 96% based on reviews from 233 critics, with an average rating of 8.90/10. The site's critical consensus reads, "Grimly intense yet thoroughly rewarding,
Son of Saul offers an unforgettable viewing experience – and establishes director László Nemes as a talent to watch". On
Metacritic, the film has a score of 91 out of 100, based on reviews from 49 critics, indicating "universal acclaim". In his review for
The Guardian,
Peter Bradshaw rated the film five out of five stars, calling it an "astonishing debut film" and "a horror movie of extraordinary focus and courage". He ended his review writing: "Nemes's film has found a way to create a fictional drama with a gaunt, fierce kind of courage...." Writing for
Time Out, Dave Calhoun also gave the film five out of five stars.
Indiewires Eric Kohn awarded the film an A− rating, calling it "a remarkable refashioning of the Holocaust drama that reignites the setting with extraordinary immediacy". In his review written for
The Hollywood Reporter, Boyd van Hoeij praised the cinematography and the soundwork of the film. He writes: "Shot (and shown in Cannes) on 35mm, often in sickly greens and yellows and with deep shadows, Erdely's cinematography is one of the film's major assets, but it wouldn't be half as effective without the soundwork, which plays a major role in suggesting what is happening around Saul, with audiences often forced to rely on the sound to imagine the whole, horrible picture". Writing for
The Film Stage, Giovanni Marchini Camia gave the film an A rating, and called it "a towering landmark for filmic fictionalizations of the Holocaust". A.A. Dowd of
The A.V. Club gave the film an A− rating, and praised the movie's unique perspective: "
Son of Saul is the rare Holocaust drama that finds actual drama, and not just despair, in the living hell of a concentration camp". [...] "
Son of Saul sees humanity in effort, identity in action; it watches someone with nothing, a man reduced to a statistic, get a piece of himself back, mostly by finding some meaning in a place of meaningless evil".
Claude Lanzmann, director of the documentary
Shoah, gave the film high praise, stating that "it's a very new film, very original, very unusual. It's a film that gives a very real sense of what it was like to be in the
Sonderkommando. It's not at all melodramatic. It's done with a very great modesty". Philosopher
Georges Didi-Huberman also praised the film, and he wrote a 25-page open letter to Nemes, which opened with "Your film, ‘Son of Saul,' is a monster. A necessary, coherent, beneficial, innocent monster". In a 2016
BBC poll, critics voted the film the 34th greatest since 2000. In 2019,
The Guardian critics ranked the film 12th in its Best Films of the 21st Century list. ==Accolades==