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See all ads on AdLibrary →Guayaki Yerba Mate is a California-based brand co-founded in 1996 at Cal Poly by Alex Pryor and David Karr. As the first to bring canned yerba mate to US scale, it created the category via natural food retail and music festival sponsorships. A founding B Corp with an Indigenous-partnership sourcing model, it rebranded as Yerba Madre in April 2025. Also searched as Guayaki.