Any Tool to check what websites bring the most traffics to my competitor?

[ringochan]

Our competitor has alexa ranking 1329 in UK but we are only ranked 36,147

However, They are not ranking extremely well on google. Sometimes we rank higher than them on some of the keywords.

Therefore they must have some good referral traffics from other websites.

Is there any tool i can use to track what websites bring them traffics?

[RebekahMay]

Quantcast and Compete are good

[MoosaHemani]

Honestly Alexa, Compete or Quantcast all are the estimators and can be seriously wrong at times... I think there is no tool that can give you the exact data of traffic (this is the real beauty of the online marketing) but there are several things like organic rankings, what estimated traffic they can get and how they are performing in PPC and some other data can be found through tools like Keyword Spy and SEM Rush!