The math is simple
$1040 a
That's what the average kombucha drinker spends at the store. The Fermenstation pays for itself in 6 months. Then you're just saving.
Your numbers
See exactly when it pays for itself.
Adjust the sliders to match how you actually drink kombucha. The calculator does the rest.
Store cost / year
$778
buying from a store
F1 cost / year
$30
ingredients only, after F1
Your 3-year savings
$1,747
vs. buying at the store
side by side
Store-bought vs. making your own.
Cost item
Per bottle
Per week (4 bottles)
Per month
Year 1 (inc. device)
Year 2
Year 3
3-year total
KOMBU
$0.40c
$1.60
$6.40
$675.80
$76.80
$76.80
$829.40
Store-bought
$5
$20
$80
$960
$960
$960
$2880
Homemade.
1. Automated
Dual-stage fermentation using a low heating, temperature-controlled system.
2. Connected
Stay connected by using the mobile app to control the device, like setting timers.
3. High Quality
All glass containers. Stainless steel spigot. Platinum silicone gaskets.
Save time and
Already ready at home and only spending pennies on the dollar to brew great kombucha.
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.
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$599
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.
Real Fermentation
Automated Heating
Reusable Glass Bottles
- (4) Carbonation glass bottles: 700ml
- Carbonation Caps with PRV (Pat. Pend.)
- Food-grade silicone gaskets
- Borosilicate glass jar: 3.5L
- Aluminum heating pads
- Stainless steel spigot
- Non-toxic materials
- 12V DC US & Canada | 36W
- 1.5m / 5ft cord
App: Available on iOS and Android.
Dimensions (L × W × H):114 x 7.36 x 10.5in | 355 x 187 x 267mm
Weight 15lbs
1-Year Warranty Included
30 Day Return Policy
Once you receive your KOMBU device, you will be fully covered under our warranty terms if there is any issue related to damage or manufacturer defects. Learn more
Free US Shipping
1 year warranty
Secure Payment
Award Winning
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!