Best Price Tracker Browser Extensions in 2026, Ranked

Browser extensions are the default way most people approach price tracking. Install something, let it run in the background, and get useful data while you shop. Simple enough in theory.

In practice, most price tracker extensions share a significant problem: they're built for Amazon. If you shop anywhere else, their usefulness drops fast. Here's an honest ranking of the major options, what each does well, and where each falls short.

The Contenders

The main price tracker extensions worth considering in 2026:

• Keepa (Amazon price history and alerts)
• The Camelizer by CamelCamelCamel (Amazon price charts)
• Honey (coupon codes plus Amazon price history)
• Rakuten (cashback on participating retailers)
• Capital One Shopping (formerly Wikibuy, multi-retailer price comparison)

Each takes a different angle on saving money. The right choice depends on where you shop, what data you care about, and how much you trust a third party with your browsing history.

1. Keepa: Best for Amazon Power Users

Keepa is the most data-rich option for Amazon shoppers. Install the extension and every Amazon product page gets a price history chart embedded directly below the main listing. The charts show Amazon's price, third-party seller prices, warehouse deal pricing, and new/used breakdowns going back years.

For serious Amazon deal hunters, this depth is genuinely useful. You can see at a glance whether today's price is historically low or inflated ahead of a fake sale. The alert system works: set a target price for any Amazon product and Keepa emails you when it hits.

The downsides are real. The interface is dense to the point of intimidating casual shoppers. The full feature set costs around 20 euros per year. Keepa has no capability outside Amazon. And the mobile experience is weak: browser extensions don't run on most mobile browsers, so Keepa is effectively a desktop-only tool.

Who it's for: Frequent Amazon shoppers who want maximum historical data and are comfortable with complexity.

2. The Camelizer by CamelCamelCamel: Best Simple Option for Amazon

CamelCamelCamel's extension does one thing and does it well. Click the camel icon on any Amazon product page and get a clean price history chart. You can jump from there to CamelCamelCamel's site to set a price drop alert.

The interface is far cleaner than Keepa's. If you want a quick read on whether an Amazon price is historically good without wading through a wall of charts, The Camelizer delivers it. The underlying data is solid. CamelCamelCamel has been tracking Amazon prices since 2008.

The limitations match Keepa's on scope: Amazon only, desktop-first, no mobile extension support. The alert system works but lives on the CamelCamelCamel website, not in the extension itself. For multi-retailer shopping or mobile price tracking, it offers nothing.

Who it's for: Casual Amazon shoppers who want quick price history checks without a complex tool.

3. Honey: Best for Coupon Automation

Honey is not primarily a price tracker. It's a coupon tool that happens to include price tracking for Amazon products. Installed at checkout, Honey automatically tests coupon codes and applies the best available discount.

That core feature is legitimately useful. Manual coupon hunting is tedious, and Honey removes the friction entirely. On major retailers, it finds working codes a meaningful percentage of the time.

Honey's price tracking feature, called Droplist, lets you watch Amazon products and get notified when prices drop. It works, but it's clearly secondary to the coupon function. The price history data is there but less prominent than Keepa or CamelCamelCamel.

Privacy is a real consideration with Honey. The extension watches every page you visit on participating retailers to know when to activate. PayPal acquired Honey in 2020. If you're sensitive about a payment company having visibility into your browsing and purchase behavior, that's worth factoring in.

For a full comparison of Honey and Slasher as savings tools, Honey vs Slasher: Coupons vs Price Tracking covers both in detail.

Who it's for: Shoppers who want automatic coupon application and are comfortable with the privacy trade-off.

4. Rakuten: Best for Cashback

Rakuten's extension is not a price tracker at all. It earns you cashback on purchases from participating retailers by routing affiliate commissions back to you. The extension activates when you visit a participating store and shows you the current cashback rate.

Cashback rates vary from 1% to 15% depending on the retailer and season, with occasional promotional spikes higher. PayPal is the easiest payout method. The quarterly Big Fat Check arrives whether or not you think about it, which is part of the appeal.

What Rakuten doesn't do: any price history, any price alerts, any awareness of whether the price you're paying is high or low. It's passive earnings on purchases you were making regardless of price.

Who it's for: Anyone who shops at major retailers and wants a passive rebate. Works best as a complement to other tools, not a replacement.

5. Capital One Shopping: Decent Multi-Retailer Comparison

Capital One Shopping (formerly Wikibuy) takes a broader approach than the Amazon-focused tools. It tries to surface lower prices from other retailers when you're looking at a product on one site. The coupon testing feature is similar to Honey.

The price comparison is useful in concept. If you're on Amazon looking at a TV and Best Buy or Walmart has it cheaper, Capital One Shopping surfaces that. In practice, the comparison isn't always accurate and the extension is more aggressive in its prompts than some people prefer.

Price history tracking is limited. It's not the main feature and the data depth doesn't match Keepa or CamelCamelCamel for Amazon. For stores outside Amazon, historical data is thin.

Capital One Shopping is most useful as a checkout-time comparison nudge. For ongoing price tracking, it's not the right tool.

Who it's for: Shoppers who want a quick second opinion on price across retailers at checkout.

The Amazon Problem

Here's the honest assessment of all five extensions: they're Amazon-centric. Keepa and The Camelizer are Amazon-only by design. Honey's price tracking only covers Amazon. Rakuten and Capital One Shopping work across retailers but don't provide meaningful price history on non-Amazon stores.

If you shop primarily on Amazon, extensions serve you well. Desktop shoppers with Chrome or Firefox get solid coverage from one or two of these.

If you shop across retailers, use your phone as your primary shopping device, or track products on specialty stores and brand sites, extensions leave a significant gap. Browser extensions don't run on mobile Safari or most mobile browsers. They require a desktop and a supported browser. They have no answer for the price tracking question on any store outside their coverage area.

That's where a web app like Slasher fills the gap. No installation required. Works on any device, any browser, any store. You paste a URL and Slasher tracks it. The mobile-first design means you can add something to your watchlist while you're standing in a physical store, comparing the in-store price to what Slasher shows for online retailers.

For the full picture of how all these tools fit together, The Ultimate Guide to Price Tracking in 2026 covers the complete toolkit.

Summary Rankings

Extension	Best For	Amazon Only?	Mobile?
Keepa	Amazon power users, resellers	Yes	No
The Camelizer	Casual Amazon shoppers	Yes	No
Honey	Coupon automation	Amazon for history	No
Rakuten	Passive cashback	No, but no history	No
Capital One Shopping	Checkout comparison	No	No

The Verdict

For Amazon shopping on desktop, Keepa or The Camelizer is the strongest choice depending on how much data complexity you want. Add Rakuten and Honey as passive layers for cashback and coupons. They cost nothing and don't conflict with each other.

For anything beyond Amazon, whether that's other major retailers or specialty stores, add Slasher to your toolkit. It covers the territory that extensions miss and works on whatever device you're actually shopping from.

The ideal setup isn't one tool. It's the right tool for each situation. Extensions handle Amazon on desktop. Slasher handles everything else and every phone.

Start tracking prices on any store at slasher.sale.