It was recorded in Bergen with three producers who share the same building, Jørgen Træen, Yngve Sætre, and Iver Sandøy, which guitarist Vidar Landa says "was great, because it made us able to work 24 hours a day".

[2] Jeff Podoshen of Metal Injection wrote that Endling "fits snugly in with their existing catalog", calling it "heavy, groovy and just downright fun" and an album that "will get your attention from the opening note and hold it all the way through".

[8] Timothy Monger of AllMusic found that the album "has less to prove yet feels more confident for it" and "touch[es] on a variety of sonic hallmarks from cocky thrash punk ('Motsols') and chunky NWOBHM ('Likvoke') to abrasive folk metal ("Døgeniktens Kvad"), all played with crackling anxious abandon".

[4] Dom Lawson of Blabbermouth.net felt that the "second half of Endling has more surprises per square inch than the first" but overall "the results rock stupidly hard, as we should have expected".

[6] Reviewing the album for MusicOMH, Ross Horton stated Endling "feels like a fresh start" and remarked that "Kvelertak must be the best entry-level metal band on the planet (save for Ghost)" if "casual newcomers" can "get over [...] Nikolaisen's vocal delivery", as they are able to "unite seemingly opposite ends of the metal spectrum into one cohesive whole".