Lots of people publicly host searx instances. There's a list of publicly available instances online, but if you are looking for a tool that randomly redirects you to an instance for every search you do on your browser's bar, you can use neocities: https://searx.neocities.org/changelog

I use this all the time. A downside is that sometimes you land on an instance that doesn't provide any results or gives you really poor ones. This has been happening less frequently recently.