Komparzon, Hagglezon, Charlize, MaxSpar, CamelCamelCamel and Keepa compared in September 2026: countries, shipping, AI assistant and extension.
Komparzon is a free comparator that queries the 7 European Amazon marketplaces (FR, DE, UK, ES, IT, BE, NL) from a single ASIN, with automatic EUR/GBP conversion. Long-standing tools such as Keepa or CamelCamelCamel track how a price moves on one marketplace: the two approaches complement each other rather than compete.
It depends what you are after. For the largest number of countries, Hagglezon (10). For the deepest history, Keepa. To know the price you will actually pay including delivery, and to get help choosing the product, Komparzon is the only one combining real shipping costs, an AI assistant, alerts and a basket comparator.
Yes. The Komparzon extension is free on the Chrome Web Store and works on Chrome, Edge, Brave and Opera. It compares 9 marketplaces directly on Amazon pages and reads the real delivery charges for your address. Firefox and Safari cannot install Chrome Web Store extensions.
For the questions a price table does not answer: reliability, compatibility, dimensions, what the customer reviews actually say. It also suggests alternative products, each immediately comparable across the 7 countries. It is free, available in 6 languages, and its answers are AI-generated — worth cross-checking before an expensive purchase.
Up to 30% depending on the product, with wide variation: electronics and large appliances show the biggest gaps, small items far less. A price gap only becomes a saving once shipping is counted — which is exactly what the extension is for.
No, there is no customs duty within the European Union: VAT is already included in the price Amazon shows. The United Kingdom has been outside the EU since Brexit; on UK orders, VAT and possible import fees may apply. Amazon generally collects them at checkout, so there is no surprise on delivery.
No. The Keepa Pro subscription is €29 per month, or €290 per year, in 2026. Articles still quoting €19 have not been updated. Basic price history and alerts remain free.
It is even recommended. They do different jobs: a multi-country comparator to find the cheapest country, a history tracker to know whether the timing is right. Komparzon does both, though Keepa's history goes deeper.