Track koji, miso, and shoyu batches with the structure your notebooks never had

Log observations, track conditions, and compare results across batches. Built for chefs, fermentation labs, and artisanal producers.

Why fermentation knowledge gets lost

Good process deserves better records than scattered notes and memory.

How Koji Companion works

Track batches with phases, timelines, and ingredients. Log temperature, humidity, aroma, and growth notes. Compare results side by side to see what changed and what to repeat.

Who this is for

Built for fermentation professionals who need structure, not recipe guidance.