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Amazon or Quamtrax: which is cheaper across 5 categories
Amazon23Quamtraxacross 5 categories both of them sell
The short answer. Of the 5 categories both sell, Amazon has the lower median in 2 and Quamtrax in 3. Across the whole catalogue, Amazon sits 6 % below the market median and Quamtrax 5 % below.
No store is cheap at everything. This page does not name a winner: it gives each one’s median in every category they share, so you can see where each wins and by how much. Prices are from the last collection and change; catalogue and certification change far less.
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Category by category
Each store’s median, in its unit
| Category | Amazon | Quamtrax | Difference |
|---|---|---|---|
| Carbohydrates49 products from Amazon and 3 from Quamtrax. | €15.99/kg0 % vs market | €24.60/kg+54 % vs market | 54 %cheaper: Amazon |
| Collagen65 products from Amazon and 4 from Quamtrax. | €59.67/kg-1 % vs market | €56.86/kg-5 % vs market | 5 %cheaper: Quamtrax |
| Creatine83 products from Amazon and 5 from Quamtrax. | €39.90/kg-33 % vs market | €63.00/kg+6 % vs market | 58 %cheaper: Amazon |
| Glutamine51 products from Amazon and 3 from Quamtrax. | €58.17/kg-2 % vs market | €49.17/kg-17 % vs market | 18 %cheaper: Quamtrax |
| Whey protein (concentrate)44 products from Amazon and 7 from Quamtrax. | €41.98/kg-7 % vs market | €41.45/kg-8 % vs market | 1 %cheaper: Quamtrax |
The median is not the price you will pay. It is the midpoint of that store’s catalogue in that category: it tells you where to start looking, not what to buy. That is what each category table is for, where the specific row counts.
Both stores, figure by figure
What is not today’s price
| Figure | Amazon | Quamtrax |
|---|---|---|
| Price indexMedian distance from the market median in the categories where it has three products or more. Negative is cheap. | -6 % | -5 % |
| Categories comparedAcross the whole site, in how many it has enough catalogue to be measured. | 30 | 5 |
| Products comparedThe ones this site collects from that store, not its whole catalogue. | 1600 | 30 |
| Brands in the catalogueA single brand means own brand (no manufacturer margin); many means reselling. | 466 | 1 |
| With lab reportLevel 3 or 4: testing a batch costs money and is passed on in the price. | 3 of 1600 | 1 of 30 |
| Product pages declaring additivesAn additive takes up grams that are not active ingredient and is cheaper than it. | 0 % | 3 % |
Questions about Amazon and Quamtrax
Answered with the data on this page
- Amazon or Quamtrax?
- Of the 5 categories both sell, Amazon has the lower median in 2 and Quamtrax in 3. Across the whole catalogue, Amazon sits 6 % below the market median and Quamtrax 5 % below. Price is not everything: Amazon publishes lab reports on 3 products and Quamtrax on 1.
- In which categories does each one win?
- Amazon is cheaper in carbohydrates, creatine. Quamtrax is cheaper in collagen, glutamine, whey protein (concentrate). These are medians of each catalogue in each category’s unit, with prices from October 15, 2026.
- Which catalogue is bigger?
- Amazon has 1600 products compared here across 30 categories and Quamtrax 30 across 10. Amazon spreads its catalogue across 466 brands and Quamtrax only its own: a store selling its own brand skips the manufacturer’s margin, a reseller pays it and in exchange carries brands the other does not.
Keep comparing
The same stores, by category