Cauldron Ferm has a unique backstory, with its technological roots stretching back to the 1960s or 70s. Founders David and Polly MacLennan envisioned a solution for global food security through protein sourced from microbes. Recognising that the traditional fermentation process was costly and slow, they aimed to improve it. Conventional fermentation, akin to brewing, involves batch processing, which is fine for high-margin products like alcohol but not sustainable for affordable food.
Over four decades, the MacLennans refined their approach to continuous fermentation, which allows for a seamless, ongoing production process, transforming microbes into efficient production lines. Michele Stansfield, who joined the company in 2012, eventually realised the company’s potential in the realm of continuous fermentation and sought to pivot it from a service-based model to a dynamic startup. She raised a seed round and secured the intellectual property, physical assets, and business components necessary for this transformation.
Recently, Cauldron Ferm raised $13.25 million in a Series A2 funding round led by Main Sequence Ventures, with participation from Horizons Ventures, NGS Super, and SOSV, following an initial $6.5 million raised earlier. The funding is earmarked to bolster the company’s technological advantage.
Cauldron’s proprietary method, termed “hyper fermentation,” keeps microbes in an optimum productive state and can be integrated into existing fermentation equipment with minor adjustments. Clients provide their own strains of microbes, and Cauldron customises growth conditions, including nutrient provision, to maximise their productivity.
Currently, the company’s focus is on producing fats and proteins, such as whey protein, which can easily integrate into pre-existing supply chains. However, Stansfield notes that the company is strategically diversifying its offerings, observing that biology can yield 60% of inputs for the global economy. Initially centred on food production, Cauldron is now expanding its sights on broader biological applications.
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