SearxNG, much like original SearX, pulls data from a variety of search engines, reducing their bias, and also has great filtering options, including filters for academic/IT/social/etc.

Aside from that, it is decentralized and private. Everyone can kickstart their own SearX server, though it might need some minimal juice to work quickly.

And yes, it can be integrated to search from URL bar much like any other search engine. Some instances offer addons that set their one to default, tho you don't have to install anything, just add your preferred instance to the list of search engines, Firefox will prompt you on that, for example.