37x

37x is a straightforward, no-frills price comparison tool that does one thing well: help you find the cheapest price for a product across a wide range of European retailers. The service is free, independent, and updated hourly, which is exactly what you want from a comparison site. We like that it doesn't bury you with ads or sponsored listings—the default sort is by lowest price, so you see the best deal first. If you live in one of the 32 supported countries and regularly buy from online shops, this is a handy bookmark. The coverage is broad, with over 3,000 retailers, including big names like Amazon and local shops. The trending deals and featured collections can also surface worthwhile discounts. Where 37x falls short is its limited scope. For one, it's web-only—there's no mobile app, which is surprising in 2025. If you're outside Europe, you're out of luck entirely. And if you're a developer or business that needs programmatic access to price data, there's no public API. Compared to PriceRunner or Idealo, 37x is more focused on European markets and has a cleaner, less cluttered interface. However, PriceRunner offers a mobile app and broader geographic coverage. 37x's retailer partnership model is unique—it funds Google Shopping campaigns for retailers via CSS, making it attractive for stores. The only real caveat is that you're limited to European retailers. If you mostly shop from US or Asian stores, this won't help. But for its target audience—European consumers—37x is a reliable, free tool that does the job without any tricks.