the modern kombucha brewer
Fermentation on
The Fermenstation utilizes a low-warming, temperature-controlled system to maintain steady warmth for the desired number of days.
Purpose-built to craft your kombucha
Fermentation is all about temperature. Too cold and it stalls. Too warm and off-flavours develop. The Fermenstation holds your brew at exactly the right environment, batch after batch.
Real-time Monitoring
Stay in sync. Track, adjust, and perfect your brew from anywhere.
Automated Warming
Holds your brew to the perfect goldilocks zone of warm. Just set it, forget it.
Dual-zone Fermentation
Set smart timers with automatic heating, auto-off, and brew-ready notifications.
Compact Footprint
This countertop hero sports a compact and efficient size.
The control center
Your brew.
Introducing
Booch.
The hardest part of home brewing is the uncertainty.
The Fermenstation removes it.
Brew your tea, add sugar, cool it down, and pour it in. That's it. Three ingredients you recognize.
With auto-temperature control and timer alerts, you don't have to check it obsessively.
Flavor with your favorites. Then enjoy real kombucha, live cultures intact. All for about 0.40c a bottle.
kombucha 101
First Fermentation
Turn tea, sugar, and SCOBY into plain kombucha (unflavored / non-carbonated). Ferments in about 7-10 days.
Second Fermentation
Here we add natural sugars to flavor and carbonate. Use fruit, juice, spices, extracts, or other natural sugars and flavors. Ferments in about 3-5 days.
$499
$599
Save
$100
✨ A better way to brew your booch.
KOMBU is the first modern kombucha brewer. It brings kombucha into the 21st century with an efficient, compact, and connected device. KOMBU makes it easy to brew great kombucha at home - for a fraction of the cost of store-bought.
👉 Limited batch. Ships mid-September.
🚚 Shipping to USA 🗽
Featured on
The best way to support the gut microbiome is to consume 1-4 servings of low-sugar fermented food per day.
Huberman Podcast
Common Questions
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None at all. The F1 was designed for people who've never fermented anything. The app walks you through your first batch step by step, and the temperature control handles the most common failure point automatically.
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Start by sourcing your starter liquid (SCOBY) - a yeasty and friendly bacteria thriving liquid kombucha. You can use a bottle of raw, unpasteurized plain kombucha from the store, or get a starter from a friend, neighbor, or online.
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Temperature consistency is everything in fermentation. Kitchen counters fluctuate — too cold and it stalls, too warm and off-flavors develop. The F1 warms your brew at the ideal range, every batch, regardless of your kitchen. Alongside high-quality materials, our modern convenience features improve the experience.
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The vessels and lids are designed for easy disassembly and cleaning. Bottles can be cleaned after every use, and the jar can be cleaned every 6 months to a year. Because the jar uses a continuous brewing method, it needs less periodic cleaning. The liquid is acidic, so it wards off any harmful bacteria!