Grep is an interesting new search engine -- with one disadvantage
There has been no shortage of new search engines in the past couple of years. While search is still dominated by Google Search, there has been an increase in startups that try to change the game by ditching the advertisement-driven system of the old and establishing commercial search engines.
Users pay a monthly subscription fee to the makers of Neeva or Kagi, and get the promise of ad-free and tracking-free search experiences. These search engines may also have other useful features in addition.