Peekier

Peekier is a privacy-focused search engine with thumbnails of the sites you visit before you click on them. I like the concept. I think the back-end uses Bing results, which is different from Google's. However:

1. You can change options to limit the adult content.
2. You cannot search using advanced search options without typing them into the search (for example, typing cloud images or 2019 free email providers).
3. It is very difficult to see if an outdated result appears. Old links that no longer work, though, show as blank.
   

Peekier is a innovative search engine, i think it is the first search engine that can show direct the previews of the sites in search results, and this is a great way/solution to use browsers very efficient of the empty spaces in the search results.