You buy a TV on Friday, and on Tuesday the same store sells it for $80 less. Many stores will give you that $80 back if you ask in time. Few people ask, because nobody keeps checking the price of something they've already bought. Paribus was built to do that checking for you. Here's what happened to it, what still works in the US and Europe in 2026, and how Dipper handles it.
Quick verdict: Paribus filed price-adjustment claims for you, but you can't sign up for that today. Dipper doesn't file claims. It watches the products you've bought and tells you when the price falls below what you paid while you can still get the difference back, with the deadline and how to claim it. It works on Best Buy, Target, Costco, Amazon, EU and UK stores, and any other store where you know the return window.
What was Paribus?
Paribus launched in 2014. With your permission, it scanned your email for online receipts, watched the prices of what you'd bought, and filed price-adjustment claims with retailers for you. Capital One acquired it in 2016, and it became part of Capital One Shopping.
Today paribus.co redirects to Capital One Shopping. Its homepage lists coupons, rewards and alerts when prices drop on products you've viewed or bought. It no longer advertises filing a claim on your behalf. If you got used to Paribus doing the work, you now have to notice the drop and ask the store yourself.
How Dipper's "I bought it" works
- Track the product in Dipper, from a link or the browser extension.
- After you buy, open it in Dipper and tap I bought it. The price you paid defaults to the last price Dipper saw, and the date defaults to today. Change either one if it's different.
- Dipper fills in the store's usual window (see the table below). For a store it doesn't know, you enter the number of days the store gives you. If you get a longer window, such as a Best Buy membership or a holiday extension, you can set that too.
- Dipper keeps checking the price. If it falls at least 1% below what you paid, in the same currency and before the deadline, you get a separate money-back alert by email, browser push or Telegram. It shows how much less it costs now, the deadline, and how to claim it at that store. If the price keeps falling, Dipper tells you again, at most once a day unless it drops sharply.
This alert goes out even if you got an ordinary price-drop alert for the same product earlier that day. Once the window closes, the money-back alerts stop.
Paribus vs Dipper at a glance
| Paribus (as it worked) | Dipper today | |
|---|---|---|
| Can you sign up today? | No, it redirects to Capital One Shopping | Yes |
| How it knows what you bought | Scanned your email receipts | You tap "I bought it". Dipper doesn't read your inbox. |
| Who claims the money | Paribus filed the claim | You do. Dipper tells you when and how. |
| Stores | A list of large US retailers | Any store you can track. Windows built in for Best Buy, Target, Costco, Home Depot, Amazon.com, Walmart, and EU and UK stores. |
| Europe | US only | The 14-day right of withdrawal in the EU and UK |
| Price drops before you buy | Not its focus | Any drop, % drop, target price and back-in-stock alerts, plus price history |
Who gives money back in the US (October 2026)
| Store | If the store's own price drops | Window Dipper uses |
|---|---|---|
| Best Buy | Matches its lower price during the return period (15 days, 60 for Plus/Total members). Marketplace items are excluded. | 15 days, price adjustment |
| Target | Adjusts to its own lower price within 14 days, in store or online. Holiday purchases get a longer window. | 14 days, price adjustment |
| Costco | Price adjustment within 30 days of purchase. | 30 days, price adjustment |
| The Home Depot | Adjusts within 30 days if its price drops. Third-party sellers are excluded. | 30 days, price adjustment |
| Amazon.com | No refund of the difference. Most items it sells can be returned within 30 days of delivery. | 30 days, return and rebuy |
| Walmart | No adjustment for Walmart.com orders. Most items can be returned within 90 days, but electronics only within 30. | 30 days, return and rebuy |
Where a store counts from delivery, Dipper counts from the purchase date. Delivery is never earlier than the purchase, so Dipper's deadline is never later than the store's.
Europe and the UK: the 14-day right of withdrawal
In the EU, you can withdraw from an online purchase within 14 days of receiving it, without giving a reason. The UK has the same 14-day right under the Consumer Contracts Regulations. Stores don't usually refund a price difference, but if the price drops within those 14 days you can buy it again at the new price and return the first one. You may have to pay the return shipping, so check that the saving is bigger.
Dipper uses this 14-day window for stores on EU country domains and .uk. That includes Amazon.de, .fr, .it, .es and .co.uk. Amazon's own return window there is 30 days for some categories but has been cut to 14 for many others, so 14 is the window Dipper can count on.
How to claim once Dipper alerts you
- Price adjustment (Best Buy, Target, Costco, Home Depot): contact the store by chat or phone, or at the service desk, with your order number, and point to the lower price on its own site. Do it before the deadline in the alert.
- Return and rebuy (Amazon, Walmart, EU/UK stores): buy it again at the new price first, so the deal doesn't disappear, then return the original within the return window.
- Credit-card price protection: a few US cards still offer it, but Citi, Chase and Discover dropped it years ago. Check your card's guide to benefits before you rely on it.
Store policies change, and some items are excluded (open-box, clearance, marketplace sellers). Check the store's current terms for your order before you return anything. Dipper's alert reminds you of this too.
Which should you use?
If you liked Paribus, you can't sign up for it now. Capital One Shopping will alert you to drops, but you claim the money yourself. Dipper does the same claim-it-yourself job and adds the store's deadline and how to claim to each alert. It also covers the 14-day rule in Europe, and it tracks prices before you buy.
Verdict
No tool currently claims the refund for you. What you need is to hear about the drop while you can still act on it. Track what you buy in Dipper, tap "I bought it", and you'll get an alert with the deadline and how to claim.
Try it: create a free Dipper account, paste any product link, and get alerted the moment the price drops — or add the 1-click browser extension.