Free · Early AccessSave Money.
Without Changing Your Habits.
Mercury helps you save money on products you already buy. Just shop normally, we'll show you better prices.
⏱️ Comparison may take a few seconds for the best results
Today's Best Find
Most searched product today - best price found by Mercury
Rakuten
Apple AirPods Pro 2
Price checked today. Availability may vary.
How Mercury Works
Three simple steps to smarter shopping
Browse Normally
Shop on Amazon, Fnac, Cdiscount, or any supported retailer. When you land on a product page, Mercury quietly activates.
Click & Discover
One click on the Mercury icon reveals a sleek side panel showing every relevant alternative we found.
Explore & Save
Scroll through a curated list of similar products-from identical matches to exciting alternatives-all sorted by price.
How We Stay Free
Mercury earns a commission from retailers when you purchase through our links. This commission comes from the retailer, never from you. Our rankings are based on the real price you pay-not on what we earn.
Real Savings Examples
See what beta users have saved on popular products
AirPods Pro 2
Estimates based on real savings observed during beta. Individual results may vary.
Loved by Shoppers
See what our users are saying
“Mercury saved me €80 on a phone by showing an identical model from a retailer I'd never heard of. 10/10.”
“I'm obsessed. It's like having a personal shopping assistant that never sleeps. Found 15 alternatives to a jacket I wanted.”
“Finally, a tool that just WORKS. No BS. No ads. Just clean results that help me shop smarter.”
Features That Delight
Every feature designed to make shopping smarter, faster, and more satisfying
Intelligent Matching
Advanced AI compares brands, models, specs, and prices to surface truly relevant alternatives.
Price-First Sorting
Always see the cheapest options first. High-confidence matches get special badges.
Thorough Search
We scan multiple retailers to find the best deals. Results typically appear within seconds.
Multi-Retailer Coverage
Amazon, Fnac, Cdiscount, Darty, Boulanger, and more. We search where you'd search.
Privacy-First
No tracking. No selling your data. Mercury works for you, not advertisers.
Frequently Asked Questions
Is Mercury really free?
Yes. Completely free. No hidden costs, no premium tiers, no credit card required.
Will Mercury slow down my browser?
No. Mercury is lightweight and only activates when you're on a product page. Your browsing stays fast and smooth.
Does Mercury track my shopping habits?
No. We don't track, store, or sell your data. Your privacy is non-negotiable.
Which retailers does Mercury search?
Currently: Amazon, Fnac, Cdiscount, Darty, Boulanger, Zalando, La Redoute, Rakuten. We're adding more every month.
Why does the comparison sometimes take a few seconds?
Mercury searches multiple retailers in real-time to find the best prices. This thorough search ensures you get the most accurate and up-to-date results.
Ready to Start Saving?
Join our free early access and never overpay again