Price Comparison & Monitoring
See real, unbiased prices across retailers and regions
Why you're not seeing real prices online
E-commerce platforms and airlines use dynamic pricing algorithms that adjust prices based on your browsing history, location, device type, and browser fingerprint. Returning visitors often see higher prices, and users in wealthier regions are shown premium pricing. Your browser fingerprint is a key signal in this process.
Donut Browser lets you compare prices as a fresh visitor from any region. Each profile has a unique fingerprint and can use a different proxy, so you see the actual price offered to a first-time visitor in any target market — not the inflated price shown to a returning user.
Key Features
Multi-Region Price Checks
Assign proxies from different countries to each profile. See prices as a local customer in any market.
Fresh Visitor Every Time
Each profile has a unique fingerprint, so platforms treat you as a new visitor with no browsing history.
Price Tracking Over Time
Monitor how prices change across sessions. Compare pricing patterns without triggering anti-scraping defenses.
No Dynamic Pricing Bias
Eliminate personalized markup based on your past visits, device type, or perceived purchasing power.
Competitor Price Analysis
Monitor competitor pricing across multiple marketplaces simultaneously from isolated profiles.
Why Incognito Mode Isn't Enough for Price Comparison
Private browsing clears cookies but doesn't change your browser fingerprint. Retailers still recognize you.
 Donut Browser | Incognito Mode | |
|---|---|---|
| Browser Fingerprint | Unique per profile — each session looks like a different device | Same fingerprint as normal browsing — you're still identifiable |
| Geographic Location | Per-profile proxy support — appear as a local visitor anywhere | Same IP address — your real location is visible |
| Browsing History | Separate history per profile — no cross-session price inflation | Cleared on close, but fingerprint persists across sessions |
| Cookies & Sessions | Fully isolated cookie jars — each profile has its own session | Cleared on close, but re-created on next visit via fingerprint |
| Multiple Regions at Once | Run profiles from 10+ regions simultaneously | Limited to your real location |
Core Features — Always Free
Everything you need to get started, without creating an account
FAQ
