DuckDuckGo is 12 years old. They're far away from being a new upstart.
To put that into perspective, AltaVista's prime years only lasted six or seven years (~1996-2002; sold off in 2003). DDG is now one of the oldest independent search engines in Internet history.
Their very long-term, very slow, grinding upwards is one of the most amazing aspects of what they're accomplishing. It's incredibly difficult to do versus an entrenched monopoly (and one of the most powerful brands and corporations in the world at that). You almost never see it happen in tech once a monopoly is stable.