What is a free or cheap way to collect traffic statistics for a list of sites?

Question

Web traffic analysis

There is a list of 620,000 Url, for each you need to get data on the number of visits for the last 30 days (including the number of pages viewed, time spent on the site and geography of visits).
Is there a free method to get this information? If not, what is the cheapest?
Manually - it will take quite a lot of time.
SimilarWeb api - $15,000 a bit expensive
Alexa - doesn't have clear traffic info and only has data for sites with ratings above 1M, which will clean up more than half of the
SemRush list - API is still in beta, API requests will cost about $3,500
Looking for a bypass or a free alternative

Answer 1

Alexa - doesn't have clear traffic info and only has data for sites with ratings above 1M

similarweb also covered low-traffic