At Distil Networks, we block bots. We stop bad bots and malicious traffic from accessing websites, stealing and scraping your data, clicking on your ads, and spamming your forms. Basically, stop any kind of automation against a website that website owners don't want.
Distil Networks uses Nginx as a reverse proxy. As a platform-delivering content, it's pretty much best in breed. But we needed something that was both fast, function does a reverse proxy, and was able to make quick decisions on content, whether to serve or not. For our customers, as much as they want, bots do not access their website.