2 ms·
Their own site specifically says they use Bing, Yahoo, and Yandex, plus literally hundreds of other specific sources of data. https://duck.co/help/results/sour
by stephenr 9y ago
Their own site specifically says they use Bing, Yahoo, and Yandex, plus literally hundreds of other specific sources of data.
https://duck.co/help/results/sources https://duck.co/help/results/sources