Leaven Foods raises $350K for shelf-stable sourdough yeast powder

Leaven Foods is trying to pull sourdough out of the jar on the counter and into a shelf-stable powder. The San Diego startup says its non-GMO blend of sourdough yeast and beneficial bacteria needs zero feeding or care, and it has now secured $350,000 as it works toward a $2 million seed round.

The company was founded in 2023 by two scientists who bake and, by its own account, started with a familiar home-baking frustration: great sourdough is rewarding, but keeping a live starter alive is work. Leaven’s answer is an easy-to-use powder designed to preserve sourdough flavor, fermentation and performance without a live starter, a pitch aimed at home bakers, chefs and larger food producers looking for consistency at scale.

Leaven is already marketing at least two products. Instant Sourdough comes in an 8-ounce pouch, with smaller packet formats also listed, and the company says it is not a 1:1 substitute for instant yeast. Bakers are directed to conversion charts, FAQs and recipes instead of treating it like a straight swap. Wild Yeast also comes in an 8-ounce pouch, with smaller packets available, and Leaven describes it as a blend of non-GMO wild yeast from artisan sourdough that delivers a rich buttery taste without sourness.

That positioning puts Leaven in the middle of a central sourdough debate: whether the flavor and performance of sourdough can be separated from the live starter ritual that defines it for many bakers. The company is betting that the answer is yes, and that convenience does not have to mean bland bread.

The pitch has already reached the trade-show circuit. Leaven was listed as a 2026 NEXTY Award finalist and showed up at Natural Products Expo West 2026 in Anaheim at booth #N1413. New Hope Network said nearly 1,000 products were entered across 37 categories for the 2026 NEXTY Awards, giving Leaven a crowded field to stand out in.

Public materials also show a small, patent-backed company with a big category ambition. Crunchbase lists Leaven Foods as a private seed-stage business with 1 to 10 employees and one patent in baking and edible doughs. Founder and CEO Cameron Martino is the public face of the company as it pushes a simple claim with broad implications for sourdough bakers: less starter maintenance, more consistency, and a faster path from mix to loaf.