Your five essentials at today's price. For six months.
Milk, eggs, butter, coffee and ground beef keep getting more expensive from one week to the next. Cellar Systems lets you lock the price you pay for them today, inside the supermarket app you already use. Nothing changes at the till.
One fee, once: €3.80 for a typical basket over six months. About the price of one coffee.
Simulated checkout, shown in the REWE app because that's where it would live. Nothing is paid or stored. Prices are illustrative.
The shelf price moves. Yours wouldn't.
Six months of shelf prices for the five items, and the flat line you'd have paid instead. The gap between the two is what a lock is worth.
Same basket. Different bill.
Households on a fixed monthly budget can't plan around a grocery bill that moves from one week to the next. Discounts and switching brands help for a week. The uncertainty stays.
How a price lock works
Three steps, all inside the supermarket app you already have.
Choose your basket
Pick from five essentials and say roughly how much you buy each month. Six months or twelve.
Pay once, see the fee first
One fee, shown before you commit. No subscription, nothing renews. Your prices are sealed the moment you pay.
Shop as usual
Scan your loyalty card at the till. Your sealed price replaces the shelf price on those items, up to your monthly quantity.
Build your lock
Tick what you buy, set your monthly amounts and pick a term. The fee and what it protects update as you go.
Term
For retailers: a bonus your customers can only redeem with you
Every loyalty programme offers points and coupons. A sealed price on essentials is redeemed in your store, every week, for six months.
- Customers come back
A sealed price only works where it was bought. Every locked basket is a weekly reason to shop with you.
- You keep the full shelf price
The customer's fee funds the protection, not your margin. The till charges the shelf price; Cellar settles the difference.
- No commodity risk on your books
Cellar prices the risk, pools it across baskets and hedges it with institutional commodity-risk partners.
- A share of every fee
Revenue share on each lock sold through your app, with no change to procurement or pricing.
How the money and the risk move
Four parties. The retailer never holds the price risk.
- Integration
- A module in your loyalty app plus a price-adjustment call at checkout. Your POS keeps charging shelf prices.
- Pilot scope
- One region, five SKUs, one term. Enough to measure uptake, repeat visits and redemption without touching procurement.
- Exclusivity
- Category exclusivity in the pilot region for the term.
The team
Four co-founders and an intern. We met at WHU – Otto Beisheim School of Management and are building the first retailer pilot from there.
Questions people ask us
Is this a financial product?
You're buying a fixed price on groceries you already buy, for a set quantity and period, from your retailer. Cellar Systems does the pricing and hedging behind it. You never touch a market and there's nothing to trade or sell.
What if shelf prices fall?
Your price stays where you sealed it, in both directions. That's what keeps the fee small. Think of it as certainty, not a bet.
What if I don't use my full monthly quantity?
Unused quantity expires with the month. The fee isn't refunded, so the app helps you pick amounts that match what you actually buy.
Why only five items?
Milk, eggs, butter, coffee and ground beef move the most in a typical basket, and each has a liquid market behind it, which is what lets us hedge them. More items once the pilot has proved the model.
Do I need a new app or account?
No. It runs inside your supermarket's loyalty app and applies automatically when you scan your card at the till.
Which supermarkets?
The first pilot will run with one German grocery chain in one region. Leave your email below and we'll tell you when your store is in.
Be first in line for the pilot
Households get told when their store joins. Retailers get the pilot proposal and a data-room invite.