Upon release, Record Mirror praised the album's "four fine 'A' sides and their versions of some of the best non-R&B tunes around"[7] while Penny Valentine of Disc and Music Echo described "Walk Away Renée" as the album's "only outstanding track".[8]
Among retrospective reviews, BBC Music's Daryl Easlea has described Reach Out as the Four Tops' greatest album, praising its cohesion and noting that it "can be seen as the high-water mark of the first decade of Motown". Easlea considered the album and The Four Tops Greatest Hits to contain "some of the most passionate, soulful music, exquisite playing and well-written melodies of all time".[9]AllMusic's John Bush was critical of the album's cover songs, opining "though it's one of the best Four Tops records of the '60s, Reach Out still feels weighted down by a few vain attempts at adult pop crossover".[6] Writing in Motown Encyclopedia, Graham Betts felt the album "reads like a greatest hits package" and considered Holland, Dozier and Holland to have "bowed out on a high".[10]