Professional brewers know that pushing boundaries means embracing the wild side of fermentation. At The Brewing Science Institute (BSI), we offer a premium selection of wild yeast strains and Brettanomyces cultures, designed for crafting complex, genre-defining beers—from tart lambics and funky saisons to bold, barrel-aged sours.
Beyond traditional Saccharomyces cerevisiae, our catalog includes several Brettanomyces strains, including Brettanomyces claussenii, and other wild isolates. We also offer compatible bacteria for mixed-culture fermentation. These strains unlock a wide spectrum of flavors: earthy barnyard funk, leathery depth, bright tropical esters, and refined acidity—all essential to building a standout wild beer program. Explore our collection of Brettanomyces and wild yeast strains below to find the perfect match for your next wild creation.
With decades of microbial expertise, BSI provides not only high-quality, traceable yeast strains—banked and purity-tested under strict lab protocols—but also fermentation design support, including advice on mixed culture management, barrel aging, and post-ferment conditioning. Whether you’re expanding your sour beer portfolio or experimenting with spontaneous fermentation, our wild yeast solutions deliver the creative freedom and scientific confidence your brewery needs to stand out. Shop our selection of wild yeast strains above to see exactly what we have to offer.
