DuckDuckGo has 50-100 employees, according to CrunchBase, while Google has over 100,000 employees. The exact numbers are irrelevant, but Google has around three orders of magnitude more employees than DDG. a) DDG needs about 1/1000th the revenue of Google to survive at its current scale. b) Software quality does not scale linearly with manpower. A 50-100 person team can do /almost/ as well as a 10,000 person team in…
It might be helpful to point out that DDG (and other 'alternative' search engines such as Ecosia) get their search results from Bing.