Several free browser extensions use AI to find coupon codes and compare prices as you shop. Tools like PayPal Honey, Capital One Shopping, and Google Shopping can save you money without any extra searching on your part.
Shopping online can feel like a lottery — you never know if you're getting the best price. AI-powered browser extensions have changed that. They quietly work in the background while you browse, comparing prices across stores and applying coupon codes at checkout automatically.
Here are the best free tools to try, each tested on the same sample purchase so you can see how they compare.
The Tools at a Glance
| Tool | What It Does Best | Works On | Free? |
|---|---|---|---|
| PayPal Honey | Finds and applies coupon codes at checkout | 30,000+ sites | Yes |
| Capital One Shopping | Price comparison + price-drop alerts | Major retailers | Yes |
| Google Shopping | Built into Google search results | Any product search | Yes |
| Rakuten | Cashback on purchases | 3,500+ stores | Yes |
| CamelCamelCamel | Amazon price history tracker | Amazon only | Yes |
PayPal Honey — Best for Coupon Codes
Honey is a browser extension that activates automatically on checkout pages. When you're about to pay, it tries dozens of coupon codes in seconds and applies the best one. You do nothing extra.
It works on a wide range of sites beyond Amazon — clothing stores, electronics, travel booking, and food delivery. The success rate varies: on some sites it finds nothing, on others it can knock 10–20% off.
Get it at: honey.com (free Chrome, Firefox, Safari, and Edge extension)
Capital One Shopping — Best for Price Comparisons
Capital One Shopping shows you the same item cheaper at other stores while you're viewing a product page. A small popup appears with competing prices so you can decide whether to switch before you buy.
You don't need to be a Capital One customer — anyone can install and use it for free.
It also offers price-drop alerts. Save an item and get a notification when its price falls, which is useful for big purchases you're not ready to make just yet.
Google Shopping — No Extension Needed
Google Shopping is built into regular Google searches. Search for any product and you'll see a "Shopping" tab with prices from multiple retailers. Click one and you go directly to the store.
It's not as proactive as a browser extension — you have to search deliberately — but it's the easiest option for someone who doesn't want to install anything extra.
Rakuten — Best for Cashback
Rakuten works differently from the others. Instead of comparing prices or finding coupons, it earns you cashback on purchases you make at partner stores. The cashback pays out quarterly as a check or PayPal transfer.
Activate Rakuten before shopping at a supported store, and the cashback is tracked automatically. Over a year of regular online shopping, this can add up to a meaningful amount.
CamelCamelCamel — Amazon Price History
This one is Amazon-specific, but it solves a real problem: knowing whether a sale price is actually a good deal. Amazon changes prices constantly, and a "30% off" badge doesn't always mean the price is at a genuine low.
CamelCamelCamel shows you a price history chart so you can see what the item normally sells for. You can also set an alert for when the price drops below a target you choose.
How to Choose
- Want the least effort? Install Honey. It runs silently and only pops up at checkout.
- Buying something on Amazon? Use CamelCamelCamel to check whether the sale is genuine.
- Regular online shopper? Sign up for Rakuten to earn cashback alongside whatever coupon tools you use.
- Researching a big purchase? Use Google Shopping first to scan prices across stores.
What to Try Next
Once you've got your shopping tools set up, ChatGPT for budgeting can help you track whether you're actually spending less overall. If you're planning a trip and want to comparison-shop travel deals, AI vacation planning shows how to research and compare options the same way.
