Savvy shoppers know it often takes some looking around before you find the best price. It's the same with online shopping, but with so many retailers at your fingertips, where do you even begin? That's where a tool like Idealo is pretty helpful. It's an online price comparison service that lists over 300 000 products from over 14 000 retailers across the UK. The Idealo API allows e-commerce sellers to create and update product and price listings on the service.