I am estimating the market size for a web business in a specific niche. To do this the first step is to estimate the current and historic traffic for each of the existing websites in the niche.
I have looked at alexa.com, compete.com and trafficestimates.com.
None provide what I'm looking for: - alexa.com only has current/ 3 months data - Compete.com has 2 years historic (if you pay for it) - however the estimates vary a lot month to month and I have heard the estimates are way off (certainly for my own websites they are far off) - trafficestimates.com seems even worse in terms of data quality
How would you size the traffic for a website, both current, and historic? I'd like to go back 10 years if possible... ambitious I know.