About Dealophant
Dealophant is the unit-price search engine for Amazon. We rank everyday consumer products by what you actually pay per ounce, per 100 sheets, per pod, per bar, per battery, per diaper, or per wipe. Prices come from Amazon search results and can be up to 15 minutes old.
What we do
Amazon shows you a sticker price. We show you the real one. A $14 bottle of dish soap that holds 32 fl oz costs $0.44/fl oz. A "value" $19 jug that holds 64 fl oz costs $0.30/fl oz. The bigger one is 32% cheaper, but you'd never know unless you did the math on every listing on the page. Dealophant does it for you, on every search, across every variant, for free.
We currently cover 103 everyday categories: toilet paper, paper towels, laundry detergent, dish soap, diapers, baby wipes, baby formula, K-Cups, Nespresso pods, protein powder, protein bars, dog food, cat food, batteries, and dozens more. The full list lives at /compare.
Who built it
Dealophant was built by Justin Willhite, an indie operator who got tired of doing per-unit math in his head every time he ordered household supplies, and launched in February 2026. The site is operated by CommQuest, an independent commerce-tools studio.
This is not an Amazon-affiliated project. We index publicly listed Amazon prices using the same Product Advertising API that Amazon publishes for developers and creators. We are not endorsed by, sponsored by, or affiliated with Amazon.com, Inc. We earn a commission on outbound Amazon clicks via the Amazon Associates program, but commissions do not influence ranking, listings are always ordered strictly by computed price per unit, ascending.
How the math works
Every search picks one unit for the whole result, such as ounces, fluid ounces, or a count (pods, bags, or 100 sheets), and ranks the listings that can be measured in that unit by price per unit. A 30-serving tub and a 16-ounce tub are not the same comparison, so a listing that cannot be measured in the search's unit is shown separately and is not ranked.
Under the hood: Amazon search results (a repeat of the same search can be up to 15 minutes old), one unit decision per search (a built-in category rule, otherwise one call to a hosted LLM via OpenRouter, and that answer is cached), then a measurement of each listing in that unit. Amazon's own per-unit price is a cross-check when it is a comparable weight or volume, not an authority, because Amazon's data can be wrong too. Comparable listings are sorted by price per unit only. Nobody can pay to change that order, and the links to Amazon are affiliate links.
The full methodology is at /how-it-works. The machine-readable version is at /llms.txt.
What we track
Beyond the live ranking, Dealophant maintains a 90-day price history per ASIN. Every product that appears in a search gets its current price captured (deduplicated to one capture every 6 hours). You can see which products are at or near their tracked 90-day low at /lowest, and the per-ASIN trend lives at https://dealophant.com/price/<ASIN>.
What we don't do
- We don't rank by quality, reviews, or "best for X." We rank purely by computed price per unit. If you want expert recommendations, Wirecutter exists.
- We don't index non-Amazon retailers. Dealophant is Amazon-only.
- We don't sell user data, run intrusive ads, or require accounts. Search is anonymous.
- We don't promise the price on Amazon will match what we just showed you. Prices are fetched live, but they can change between our API call and your click-through. Always verify on Amazon before purchasing.
Contact
Press, partnership, or product feedback: [email protected]. We read every message.