Is it something you have to trust they comply with what they say?
Nice that it has its own indexes, but according to this comparison its proprietary SW, running on UK servers without tor interface, and being backed or debated at least by UK politicians. We're not talking about a not for profit organization either, and they do have individualized answers as well, so they have the mechanisms to individualize results to queries, meaning they keep information about your queries. So in the end, it boils down to the user trusting its service it seems.
Yes, meta search engines do not provide their own indexes, but searxNG is at least open source, you can select the search engines to use, included mojeek, and they serve as a front end preventing the underneath engine to track you (whether it's against their public policy or not) as if you were to use such engine directly.
I do !
works pretty well on both AOSP phones and gnu+linux desktops. Sad thing though is that I don't like using flatpak, and I prefer distro native built software, and on Artix/Arch, there are times where the version between the distro version is slightly outdated with regards to the mobile version, and that makes things not to work. This is mainly an issue ever since jami decided to stop supporting the gtk client on the desktop, to me the qt experience have been sad. Not sure if someone has forked the gtk client, that would be great.
So I'm using xmpp as my main messenger, and keep trying jami when it works.
I really like the p2p approach from jami, and also the way they care for those with no huge batteries phones, given they added support for unified push notifications, which can be of course avoided if required for extra privacy. Given my use case, I can't turn jami into my main messenger yet, but I keep trying, :) Meanwhile xmpp is there for me.