Hi Bado, I don't want to comment too much on specific vendors here. But in my opinion, Fou is a good source for Bot know-how. Fou's focus is on the ad fraud sector, this article focuses on Bots on websites polluting analytics data. Both are usually different types of Bots, so they need different treatment. From what I have seen in the ad sector, Fou has made a good impression, but my sample size is small.

Best, Lukas