Fermenty Pro
It remembers your kitchen.
The free plan ferments with you: it works out the recipe, walks the batch with you and tells you when the window opens. Pro adds the one thing time doesn't hand over — memory. Every batch you close narrows the next prediction.
The free plan never expires · Cancel whenever you like
What actually changes
The same question, two answers.
No recipe can tell you how many days, because it doesn't know your kitchen. Fermenty works out your window from your temperature, your sugar and your starter — and with Pro, from what has already happened to you.
On the free plan
It smells of apple and no longer of tea: it enters its window between day 6 and day 9.
With Pro, by your fifth batch
It smells of apple and no longer of tea: it enters its window between day 6 and day 7, because your kitchen runs fast.
Two days less uncertainty. Not because the model got better, but because it knows you now. How the mentor learns
Some things aren't paid for
The guardrails and the safety warnings are on the free plan and they're staying there. If a bottle is heading for too much pressure, if the alcohol is nearing the legal limit, if there's no longer a day of margin between prime and risk — you get told, whether you pay or not.
Closing and rating your batches is free too. It's your history, and it's yours from day one.
Compare
What each plan includes
| Free | Pro | Scale | |
|---|---|---|---|
| Complete guides and recipes | ✓ | ✓ | ✓ |
| Formulate to a target profile | Presets | All four axes | All four axes |
| A living window (during the batch) | ✓ | ✓ | ✓ |
| Guardrails and safety warnings | ✓ | ✓ | ✓ |
| Close and rate the batch | ✓ | ✓ | ✓ |
| Active batches | 2 | Unlimited | Unlimited |
| The mentor remembers your batches and calibrates with you | — | ✓ | ✓ |
| Compare batches and curves | — | ✓ | ✓ |
| Scale the formula by volume | — | ✓ | ✓ |
| Saved variations | — | ✓ | ✓ |
| Export | — | CSV | Advanced |
| Your own recipes, protected | — | — | ✓ |
| Traceability with measurements | — | — | ✓ |
| Stock and purchase lots | — | — | ✓ |
| Multiple users | — | — | ✓ |
The four axes are the mentor's fine controls: intensity, balance, fizz and complexity. On the free plan you choose with a phrase — mild, balanced, strong — and the mentor does the translating.
Pricing
Choose how to pay for it
Free
0 €
Free forever
- 2 active batches
- The whole mentor inside every batch: it formulates, follows and warns
- Guardrails and safety warnings
- Complete guides and recipes
Pro
4,99 €/mes
Billed monthly
- The mentor remembers your batches and calibrates with you
- Unlimited batches
- The four axes of the formulator
- Compare batches, curves and scaling
- Export to CSV
Scale
Get in touch
- Everything in Pro
- Your own recipes, protected
- Traceability with measurements
- Stock and purchase lots
- Multiple users
Being built with the first producers who use it. Write to us and you're on the list.
Prices in euros, VAT included. Scale is billed to businesses without VAT. Cancel whenever you like, from your account.
The first 100 keep the price for good
Fermenty has just started and the price is going up. Whoever joins now keeps the Early Bird rate for as long as they stay subscribed: €3.49 a month or €29 a year. It doesn't expire, it doesn't rise, and there's nothing to renew.
The rate holds while the subscription stays active. If you cancel and come back, you join at the current price.
Small producers
Growing without it showing in the jar
Scale isn't meant to make you grow faster. It's meant to keep what you make by hand being what you make once it no longer fits in the kitchen.
We built it for ours, which got too small. If that's happening to you, here's what we added: traceability with real measurements, stock control and purchase lots, multiple users, and your recipes protected — yours and only yours.
Talk to usIt's being built with the first producers who use it. There's no published price yet because we don't want to set one before knowing what you need.
Billing and plans
Worth knowing
Does the free plan expire?
No. It's free forever, with two active batches at a time and the whole mentor inside each one: it formulates, gives you the window, moves it when you taste, and warns you — with every safety warning included. What Pro adds is what happens between batches: remembering the previous ones and calibrating the windows with your kitchen.
Is there a Pro trial?
The free plan is the trial, and it has no end date. On top of that, when you close your second batch we give you fourteen days of Pro: that's the moment you have history and calibration starts to mean something.
How do I cancel?
From your account, under Subscription. You keep Pro until the end of the period you've paid for and we don't charge you again.
What happens to my batches if I go back to the free plan?
Nothing is deleted. Batches over the limit become read-only until you finish them, and your history stays whole. If you go back to Pro, calibration picks up where it was.
Do the prices include VAT?
Yes, Pro prices are shown with VAT included. Scale is billed to businesses without VAT.
What exactly is calibration?
The mentor learning two things about you: how fast your kitchen ferments, and what you call «at its prime». With that, the windows it gives you stop being the general ones and start being yours.
How is Scale different from Pro?
Pro is for your kitchen. Scale is for when what you make leaves it: traceability with measurements, stock, purchase lots and your recipes protected. The mentor is the same one.
Can I try the calculation before creating an account?
Yes. The kombucha tuner is the same engine and it's open, no sign-up. Open the tuner
Start free and decide later
Create your account, formulate your first batch and let the mentor walk it with you to its prime. Once you have a few closed, you'll know whether you want them remembered.