For stores: get your offers into the comparison

CritBuy compares game key prices for buyers in the EU. If you sell keys or games and you are not here yet, this page is how to change that. There is no fee, and nothing on this site is for sale — read on for what that means.

What we already track

8241 games, 66214 offers from 8 stores in the comparison for EU buyers, re-checked every six hours, with every price change kept since 10 September 2026.

What we are not going to do is quote you traffic figures. The site opened in September 2026 and is young; a partner who is promised volume and then sees ours would be right to stop reading. What we offer is a correct listing and a click from someone who is comparing prices at that moment.

What a listing looks like

Your offer appears on the game page in the same table as everyone else: your store name, the price in euros, the platform the key activates on and the region the key is for. The buyer clicks through to your product page and buys from you. We never take the payment and never hold the key.

What we need from you

A feed we can read on a schedule — CSV, XML, JSON or an API, whatever you already produce for other comparison sites. Per offer we need:

• a stable product id, and the product page URL;
• the game title as the publisher writes it, and the edition (standard, deluxe, a specific add-on) as a separate field;
• the price and the currency, and whether it includes VAT;
• if you add a service fee at checkout, the total as a second price field. We compare and rank on the shelf price, so the fee costs you nothing in the ranking and the price on our page is the one on yours;
• the platform the key activates on: Steam, GOG, Ubisoft Connect and so on;
• the key region — Global, EU, or whichever it really is;
• whether the offer is in stock.

The region is not a nice-to-have for us. An offer with no stated region is listed apart from the main table, with a warning, and is never shown as the lowest price — the reasoning is on the key regions page. A store that states regions honestly is at an advantage here, and that is on purpose.

If your feed already goes through an affiliate network — Awin, Impact, CJ, Tradedoubler — tell us which, and we will take it from there.

The part that is not negotiable

Offers are sorted by price. Nothing changes that: not a commission, not a bigger commission, not an exclusive feed. We don't sell placement, badges, «recommended» slots or review scores, and we don't rate shops at all. If your price is the lowest for an EU buyer, you are first; if it isn't, you aren't.

This is not modesty, it is the product. A comparison whose order can be bought is worth nothing to the buyer, and a buyer who learns that stops coming — which would cost you the click too.

Commercial terms

The normal arrangement is your affiliate program: we send the click, you pay a commission on what it sells. Tell us the network and we will apply.

No program? We will still list you. We would rather have your prices in the comparison than not have them — stores without a program are listed exactly the same way, as it says in our affiliate disclosure.

Anything beyond that — a wider feed, data we don't collect yet, other markets — is a conversation, not a price list. Write and say what you have in mind.

How we treat your data

We read your prices on a schedule and keep the history of changes. We show the price you published, in the currency you published it in, and we never convert a price we did not see. An offer we have not been able to confirm for 48 hours stops being shown as current, so a stale price is never attributed to you.

How the whole thing works: how we collect prices.

Get in touch

Write to hello@critbuy.com with the store name, the market you sell to and a link to a feed or API. If you don't have a feed, say so — a product page and a price list are enough to start.