Question: Is there a browser extension that can help me find cheaper alternatives to products I want to buy online?

First on the list is Beni, an AI-powered shopping assistant that finds secondhand products from more than 40 resale sites at a lower price. Beni comes as a browser extension and mobile app so you can check prices and look for alternatives to new products as you shop. The service covers more than 2,000 e-commerce sites, including Gucci and Target, and is free to use. It makes money through affiliate marketing.

Another option is Karma, which automatically applies promo codes and cashback rewards at checkout, and which can alert you to price drops and compare products. It covers more than 100,000 stores and has been used by more than 6 million people, so it's designed to help you save 18% on average per purchase. It also can centralize your wish list and use AI to identify products from social media posts, so it's a pretty full-featured shopping sidekick.

For a more analytical approach, Penny AI can compare prices from multiple sources with a single click, and it'll also generate pros and cons analysis with AI technology. That can help you make more informed shopping decisions by giving you a better idea of what product alternatives are out there and what their benefits are. Penny AI is designed to save you time and money by bringing a data perspective to your purchasing decisions.

Last, Score can help you find products online by performing instant reverse image searches to find matching or similar products. The browser extension is geared for the fashion and furniture markets, where shipping can be a big part of the cost. It offers both free and paid versions. Score is designed to make online shopping more efficient by helping you find the best deals.