Microsoft tried to buy Yahoo! last year but now the two former foes have come to a deal. Bing will power Yahoo! searches while it will keep control of its ads.
The combination of the two could be a huge blow to Google's power, immediately boosting Microsoft's share of online searches from 8.4% to 28%.
Yahoo! and Microsoft might be best buddies now but they made their feelings about Google pretty clear.
A joint statement from the pair said the 10-year search deal will give advertisers and users a choice instead of relying "on one company that dominates more than 70% of all search."
Do you Bing or is Google the only one for you? Let us know in the comments.