No. Britannica reports that snakes include more than 4,000 living species, and only a minority (roughly 700) are venomous to some degree. Of those venomous species, only a little more than 200 can deliver a bite that is lethal to humans. Most snakes are nonvenomous predators that subdue prey by constriction or simply by overpowering and swallowing it.
Source: Snake — Encyclopaedia Britannica (updated Aug. 31, 2026).