Searx is an open source metasearch engine.
Searx is derived from seeks, which "aims to give the control of the ranking of results to the users. Seeks is a p2p pattern matching overlay network on top of existing search engines. It provides collaborative filtering regrouping users based on the similarity of their queries and letting them reorganize and evaluate the search results together."
A list of working searx nodes can be found at: https://stats.searx.xyz/
The most obvious advantage is as regards privacy and data retention. To order results to their personal liking users can run a Searx instance and specify their own rules. The installation scripts make this easy. This is an effective way to break out of the search bubble.