At Metacritic, which assigns a weighted average score out of 100 to reviews from mainstream critics, 13 & God received an average score of 80% based on 20 reviews, indicating "generally favorable reviews".
Tim DiGravina of AllMusic gave the album 4 stars out of 5, describing it as "a decidedly dark and murky musical excursion into a realm of percolating electronics, moody jazz elements, bizarre raps, ethereal acoustic guitars, and sad pianos." Melissa Wheeler of Exclaim! called it "a gorgeous, pensive and gently dark album of rap-sprinkled mutated electronic indie rock".
Adrien Begrand of PopMatters gave the album 7 stars out of 10, saying, "It's an album that requires patience from both hip-hop devotees and IDM enthusiasts, but once it's allowed to grow on the listener, its own distinct beauty begins to surface with each subsequent listen."