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BuyPerUnit

BuyPerUnit is free.

BuyPerUnit is 100% free to use. There is no signup, no subscription, no account required, and no paid tier. Every feature — including daily price updates, price drop alerts, and product comparisons across Amazon, Best Buy, and Newegg — is available to everyone at no cost.
$0/forever

No credit card. No signup. No catch.

  • +Compare 2,600+ products by $/GB and $/page
  • +Daily price updates from Amazon, Best Buy, and Newegg
  • +Price drop email alerts
  • +Brand, capacity, and drive type filtering
  • +Product price history charts
  • +Buying guides with live price data
Start comparing prices →

How BuyPerUnit makes money

BuyPerUnit earns affiliate commissions from Amazon, Best Buy, and Newegg. When a shopper clicks a product link on BuyPerUnit and makes a purchase at the retailer, BuyPerUnit receives a small referral fee from the retailer. This costs the shopper nothing extra — the price is the same whether or not the click came from BuyPerUnit.

Affiliate commissions do not affect rankings. BuyPerUnit ranks every product by objective price per unit — the retail price divided by capacity (gigabytes for storage, pages for ink). The product with the lowest $/GB or $/page always ranks first, regardless of which retailer pays a higher commission rate.

Is BuyPerUnit worth it compared to manual price checking?

BuyPerUnit tracks prices for over 2,600 products across three major retailers and recalculates price per unit daily. To replicate this manually, a shopper would need to visit Amazon, Best Buy, and Newegg, find each product's price and capacity, divide price by capacity for each listing, and compare the results across hundreds of options. BuyPerUnit does this automatically in under a second.

Research on price comparison platforms shows that providing consumers with products strictly ranked by unit price increases actual savings by 3% compared to unranked listings. For a storage purchase in the $100-400 range, that 3% represents $3-12 in savings per purchase — found in seconds rather than hours.

Frequently Asked Questions

Is BuyPerUnit free?▾
Yes, BuyPerUnit is 100% free to use. There is no signup, no subscription, and no paid tier. Every feature on the site is available to everyone at no cost.
How does BuyPerUnit make money?▾
BuyPerUnit earns affiliate commissions from Amazon, Best Buy, and Newegg when users click product links and make purchases. This costs the user nothing extra — retailers pay BuyPerUnit a small referral fee.
Does BuyPerUnit have a paid plan?▾
No. BuyPerUnit does not offer paid plans, premium tiers, or subscriptions. All features — including price alerts, product comparisons, and daily price updates — are free.
Do affiliate links affect BuyPerUnit's rankings?▾
No. BuyPerUnit ranks every product by objective price per unit — price divided by capacity. Rankings are determined by math, not by which retailer pays a higher commission. The cheapest $/GB product always ranks first regardless of affiliate revenue.
Is BuyPerUnit worth using compared to manually checking prices?▾
BuyPerUnit tracks prices across Amazon, Best Buy, and Newegg for 2,600+ products daily and calculates $/GB and $/page automatically. Doing this manually would require checking three retailer websites, dividing each price by each product's capacity, and repeating that calculation hundreds of times. BuyPerUnit saves hours of comparison shopping with a single page load.