Parallel Search lets you type in your query once and search it across multiple search engines in parallel, and displays the results in a grid of frames obtained from different search engines all at once. The grid can consist of columns and rows, the number of which you can control from the toolbar. You can then view the initial search results in this grid of split browser frames. After that, you can keep browsing in the application's simple browser, or open the links in your favorite web browser.
You can use the pre-defined list of search engines such as Google, Bing, Duck Duck Go, Ecosa, Yahoo and Yandex, exclude or remove unwanted ones and even add your own such as Reddit.
Why Parallel Search?
Some search engines are more popular than others, but no single one of them is perfect. When you can't find something you're looking for using one search engine, there is always a chance of finding it using another, but manually searching in others is very time-consuming. Sometimes you get a similar set of results on the first page of each search engine, sometimes you don't. The problem is you never know if or when. Ozar's Parallel Search solves this problem by searching your terms through the engines defined in your preferences.
Are you a techie?
Because even a wide-spread search engine such as Google excludes one or more specific results for something 'niche' you suppose to find on a site like StackOverflow, while an alternative search engine will show it in its results. Tired of manually checking every other search engine? Let Parallel Search do it for you.
Google not displaying something you know existed for sure, say on StackOverflow ever occurred to you? Thanks to Parallel Search Deluxe, you can make sure whether whatever you're looking for exists in the database of one search engine or another.
You can quickly check how well do certain search terms / keywords perform on different search engines - specifically the ones you specify in the app's preferences.
Parallel Search will run on macOS versions as early as High Sierra 10.13 and as new as Big Sur 11.x. Yes, Ozar is keen on supporting legacy Macs.