Niche search engines are search engines designed to find very specific types of content. You can use them to discover hidden gems, uncover untapped sources of information, and discover resources you didn’t even know existed.

While there are a handful of very popular search engines that do an excellent job of finding most images and web pages, they don't always find what you're looking for.

The need to show niche search engines comes from the fact that search engines don’t crawl the entire web. The ones listed below are very specific in that they focus on things like books, medical information, images, math, videos, etc.

Whether you need to solve a complex math problem or look up scientific discussions about eclipses, the following search engines can help you find solutions to a wide range of math and science questions.