If you want to search for products or items you see in the real world using your phone's camera, Google Lens is a great built-in feature that spans several Google apps. It uses your phone's camera to visually search and identify objects, offering information about products you see. It can do a lot, including visual search for similar products, real-time text recognition, and more.
Another option is TinEye, a reverse image search tool that uses computer vision and machine learning to find similar images on the web. It's more geared for finding exact matches than similar products, but it offers a variety of products and APIs that can be useful if you need more precise image recognition.
For a full image recognition and visual search API, Ximilar offers AI-powered solutions to automatically tag, describe, and search images. You can train your own models and integrate them into your own systems, so it's a powerful option for e-commerce and other businesses where image processing is automated.
Last, Score is a browser extension that performs instant reverse image searches to find matching or similar products. It's designed to make online shopping easier by factoring in shipping costs and protecting user privacy, so it's a useful option for people looking for the best deal without sacrificing their privacy.