[huijzer]

> I'm deeply suspicious of that number. It came from Similarweb, who track these things through analytics gathered from browser extensions.

I’m less suspicious. Anecdotally, I’ve compared SimilarWeb on a few low-traffic sites of mine to the results according to an open source analytics tool and SimilarWeb got surprisingly close. They call it their "proprietary dataset".

As a side-note, I suspect that their sources include more than just browser extensions or it wouldn’t be so accurate for small sites. Couldn’t they buy data from autonomous systems or internet exchanges and extrapolate from that while correlating IPs with demographics? They only report rough estimates so SSL wouldn’t be a problem for their analytics.