upon its release, "m" received positive reviews from music critics. at metacritic, which assigns a normalized rating out of 100 to reviews from critics, the album received an average score of 83, which indicates "universal acclaim", based on 10 reviews, and was the 85th highest rated album of 2015. allmusic's thom jurek wrote: "myrkur's music melds all of her adopted stylistic elements, lets their seams show, and emerges with an innovative, alchemical creation of her own. "m" expands on black metal's boundaries yet holds its dark, foreboding spirit close." "the austin chronicle" critic michael toland stated: "danish raven amalie bruun integrates extreme intensity into both genres' [goth/black metal's] inherent drama." sean barry of consequence of sound thought that ""m" doesn’t differentiate itself greatly from the early work of many black metal artists." barry further added: "the album shines with potential and the promise that a more unique followup waits further down the trail."