Bing, Yahoo and DuckDuckGo are not a list of competitors. Yahoo is based on Bing & Google¹. DDG uses a lot of sources, but I believe the bulk of results come from Yahoo and Bing.
I agree there are options, but they are Bing and Yandex. The others are just mashups.
I agree there are options, but they are Bing and Yandex. The others are just mashups.
[1] https://en.wikipedia.org/wiki/Yahoo!_Search