The Latest Numbers on Facebook’s September US Traffic from comScore, Quantcast, & Compete
ComScore, Quantcast, and Compete have all just released their September numbers, so here’s the latest look at Facebook’s US traffic according to each metrics firm. As always, it’s important to note that these services often differ from one another because each service uses different methodologies with different strengths and weaknesses – usually based on some combination of self reporting, ISP reporting, and panel sampling – but together, we can use them to triangulate trends in Facebook’s US traffic. So, here’s the latest.
1. comScore: 95.5 million US uniques, up 8.9% m/m, up 131% y/y
comScore is reporting a big jump in Facebook’s US traffic this month – nearly 9 percent to 95.5 million people. comScore also reports that Facebook is reaching 60% of the total US social network audience of 156.7 million people right now.

2. Quantcast: 99.6 million US uniques, up 5.3% m/m, up 149% y/y
Quantcast is also reporting strong growth for Facebook in September, at 5.3% to just shy of 100 million uniques. That’s about a 150% gain over the last 12 months.

3. Compete: 122.9 million US uniques, up 1.9% m/m, up 209% y/y
Finally, Compete is reporting an increase in Facebook traffic in 2% for the month, to 122.9 million people. Again, we’re not sure why Compete’s numbers are so much higher than those reported by others (or Facebook itself), but one possibility is it’s lumping in Connect integrations somehow too.

For reference, Facebook reported its own US traffic at the end of September to be 88.3 million uniques in its own advertiser tools. Facebook’s published numbers are usually slightly delayed, however, and are usually lower than those reported by third party services.














October 14th, 2009 at 8:41 pm
The reason Facebook’s numbers will be consistently lower is because their advertising tool measures “registered users,” whereas the competitive intelligence tools are measuring “unique visitors.”
October 15th, 2009 at 7:32 am
I think Facebook is just going to continue to grow because their site is a quality networking. Robust and clean is what users want and over the years MySpace has gotten “dirty”.
October 27th, 2009 at 3:34 am
Hi! I’ve found another site valuation tool and it seems to provide competitive analysis for free. I’m talking about http://www.estimix.com .The estimation provided by estimix is the result of a complex analysis based on factors like: the age of the website, the demographic structure of the traffic, the countries where the website is popular and sources of the traffic.
November 2nd, 2009 at 10:00 am
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November 2nd, 2009 at 4:38 pm
[...] the whole, Facebook’s US audience grew by 6.8% in October to 94.2 million uniques (compare to latest data from Quantcast, Compete, and comScore). Here’s how Facebook’s gender and sex numbers break down as of [...]
December 2nd, 2009 at 7:15 am
[...] in the United States and according to ComScore [the only Web data I trust], MySpace has almost 66 million active users… three times as many as Twitter, and [sadly] Twitter is now shedding users faster than [...]