Dealophant vs Keepa
Keepa is a price-history charting tool, usually run as a Chrome extension, for a specific Amazon listing you already have open. Dealophant is a free search engine that ranks every listing in a category by true cost per ounce and true value per unit before you've picked one. They answer different halves of the same question: Keepa tells you if a listing you already chose is at a good price historically; Dealophant tells you which listing to choose in the first place.
Quick verdict
If you're already looking at a specific Amazon product page and want a long-term price chart, Keepa is the right tool. If you haven't picked a listing yet and want to know which pack size or brand is actually cheapest per ounce or per unit, Dealophant is the right tool. Power shoppers use both: Dealophant to pick the listing, Keepa to time the purchase.
When Dealophant is the better fit
- You haven't picked a specific listing yet and want the cheapest true cost per ounce across brands and pack sizes.
- You want per-unit normalization done automatically, without reading a chart.
- You want a deterministic ranking with no extension install required — it's a free web app, no signup.
- You want the methodology public and auditable, including the source code.
When Keepa is the better fit
- You already know the exact ASIN and want a multi-year price history chart.
- You want browser-extension price-drop alerts and Keepa's tracking/notification features.
- You're comparing categories where price history matters more than unit-size comparison (electronics, tools).
- You want Keepa's deeper historical data export and API for advanced tracking.
Side-by-side
| Dealophant | Keepa | |
|---|---|---|
| Primary purpose | Rank every Amazon listing in a category by true cost per ounce / true value per unit. | Chart long-term Amazon price history for a specific ASIN. |
| Question it answers | "Which listing in this category is actually cheapest per unit?" | "Is this specific listing's current price good relative to its history?" |
| Format | Free web app, no install. | Chrome/Firefox extension plus website. |
| Data source | Amazon Product Advertising API, live on every search. | Long-running price scrape/tracking history per ASIN. |
| Per-unit normalization | Yes, automated for every listing via title parsing plus an LLM classifier. | No automatic per-unit normalization. |
| Account required | No. | No for basic charts; yes for tracking/alerts. |
| Cost | Free to use — no subscription, no paywall. | Free tier; paid tiers for extended history and alerts. |
Bottom line
Use Dealophant first to find the cheapest-per-unit listing in a category, then check that specific ASIN's price history on Keepa before you buy.
FAQ
- Is Dealophant a Keepa alternative?
- Not exactly — they solve different problems. Keepa charts price history for one Amazon listing you already picked. Dealophant ranks every listing in a category by true cost per ounce and true value per unit so you can pick the right one in the first place. Many shoppers use both.
- Does Dealophant have a price history chart like Keepa?
- Dealophant maintains a 90-day rolling price history per ASIN, viewable at /price/[asin], and the /lowest page shows products at or near their tracked 90-day low. Keepa's charts go back further and are its core feature; Dealophant's core feature is the per-unit ranking across a category.
- Is Dealophant free like Keepa's basic tier?
- Yes. Dealophant is completely free to use, with no subscription and no paywall — no account required to search or compare.