MashGPT is an AI-powered brewing assistant designed for brewers of all levels. Whether you're dialing in water chemistry, solving a fermentation issue, or brainstorming a new recipe — MashGPT helps you brew smarter, faster, and better.
To empower brewers with instant, reliable brewing guidance — without the fluff. Our goal is to make expert brewing knowledge more accessible through intelligent tools and a clean, no-BS interface.
Brewing calculators are great — but sometimes you just want to ask a question and get a straight answer. MashGPT combines modern AI with real-world brewing experience to deliver fast, practical, style-aware advice that meets your specific brewing needs.
Josh Ratliff is a professional brewer and co-founder of Rustina Brewing. With over 20 years in the craft beer industry, Josh built MashGPT to give fellow brewers the tool he always wanted — a quick, trustworthy source of brewing guidance to help dial in processes and eliminate guesswork.
At MashGPT, we believe brewing will always be a deeply human craft. It's about creativity, patience, intuition, and hands-on experience.
MashGPT is not here to replace brewers, their instincts, or the artistry of recipe design. It's a tool — like a calculator or a water chemistry sheet — made to empower brewers by helping them find accurate information faster, troubleshoot more confidently, and fine-tune recipes with clarity.
Nothing MashGPT provides is intended to override human judgment. It's here to support it — so brewers can spend less time stuck and more time brewing excellent beer.
We are committed to:
MashGPT's mission is simple: To help brewers brew smarter, faster, and better — without ever losing sight of the craft.