Taylor Leverage’s review published on Letterboxd:
Engaging and suspenseful, told almost entirely visually; the relative absence of dialogue allows the audience to more easily project their own thoughts and reactions onto Redford's nameless protagonist, and the results are doubtlessly solid. Redford himself gives a well-balanced portrayal of the relative mute, allowing the series of misfortunes that befall him to reflect in his expressions, mannerisms, and countenance, like a gradually deflating balloon. While some may think that a more morbid ending could have been suitable, I don't believe that All is Lost is quite introspective enough to really pull it off. One of the most clear parallels in terms of filmmaking that seems immediately evident is Arctic (2018), a virtual clone of this film in terms of both general narrative, lack of establishing backstory, and a shared dedication to sparse dialogue, simply adjusting the setting from sea to tundra.