Compete is another Alexa wannabe tool where they measure (ca.) website traffic.
I spoke with some well known blog owners like Darren Rowse from Problogger.Net I ask him about his recent jump in traffic how did he manage to get from 60.0000 “people” to jump to 130.000 “people” according to Compete
Then I checked couple of other sites like my favorite Techcrunch since we are brothers by last name 
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Techcrunch according by compete by it self, measures: 648,362 “people” per month. In reality compete or alexa ranking are off. Not much but probably 20-30% of traffic is always missing.
Read Livecrunch in Spanish