The New York Times says, "Like “Guardians of the Galaxy,” last year’s off-brand Marvel hit, “Ant-Man” dabbles in the bright, playful colors of the superhero spectrum, reveling in moments of cartoonish whimsy and smirky humor." Rolling Stone gives it 3 out of 4 stars and says it "packs a ton of fun into a teeny package". Variety has a positive review.
Roger Ebert's site gives it 3.5 out of 4 stars and says it "provides the most pure, uncomplicated fun, and even joy, of any Marvel picture I’ve seen." Rotten Tomatoes has an 86% audience score.