37x

37x is exactly the kind of tool you bookmark and forget until you need it. When you're about to buy something and want to know if you're getting ripped off, a quick search here saves money. The coverage of 32 European countries is genuinely broad—most price comparison services either focus on one country or are weaker in smaller markets like Cyprus or Liechtenstein. That's a real differentiator. Where it bites: the lack of a mobile app and API. If you're a heavy phone shopper, you'll be stuck with a browser tab. And if you're a developer or business wanting pricing data, there's no API to hook into. That narrows its usefulness for tech-savvy users, but for purely consumer price checks, it's fine. The Google Shopping CSS partnership is a smart angle for retailers. It charges no setup fee and uses your existing affiliate program to manage campaigns—that's low-risk for sellers. But it's only useful if you're in Europe, since the service doesn't operate elsewhere. Compared to Idealo or PriceRunner, 37x is free with no registration, which is a plus. Idealo has a wider catalog in some regions, but 37x's hourly updates and unbiased default sort keep it competitive. For a free tool, the trade-off is minimal. In practice, we'd reach for this when doing a quick price sanity check before a big purchase. Not when you need an app or data. We wish it had a wishlist or price-drop alerts—that would push it ahead of competitors—but as a no-frills price comparison engine, it does its job.