Firstly, Google has been accused of favoring sites associated with major clients, as well as politically sensitive sites. For example, in 2018 it dramatically limited access to sites relating to cryptocurrency, as scrutiny of the crypto-market grew.
As Google is doing that now with the Presidential Election coming. Censorship per Elon Musk.
Gibiru search is that it qualifies as a “private search engine.” This style of search tool has become much more popular in recent years as Google’s sins have accumulated. The idea behind most of them is to offer ways to search the web without giving away personal data (or at least having the chance to consent to any data usage).