Later, Martine asks Evelyn to come over and ushers her into their house, where she reveals Nathan's dead body, having stabbed him to death with a kitchen knife.

On March 4, 2021, Annapurna Pictures brought the film adaptation rights to the novel with its author Sarah Gailey on board as an executive producer.

David Canfield called the novel "a trippy domestic thriller which takes the extramarital affair trope in some intriguingly weird new directions.

"[2] Foz Meadows said of novel, "Sharply written, disturbing and thought-provoking, The Echo Wife is the kind of book that lingers with you long after you’ve finished reading it.

"[4] In a review for NPR, Jason Heller wrote that "In the book's treatment of cloning, gender dynamics, moral ambiguity, and the lofty idea of the existential nature of identity, it has a passing resemblance to some great contemporary television, including Killing Eve, Orphan Black, Black Mirror, and Westworld..."[5]