Question: How can I identify and block malicious bot activity on my website without harming legitimate human traffic?

Veracity is designed to block malicious attacks and ad click fraud with behavioral machine learning-based detection and blocking. It monitors thousands of behavioral attributes so it can spot problems without blocking legitimate humans. The service fits into existing security infrastructure, has a free tier, flexible pricing and a lot of support documentation.

Another serious contender is DataDome, which blocks online fraud attacks with high accuracy and relatively easy setup. It scrutinizes every request with a machine learning engine trained on 5 trillion signals per day, so it shouldn't slow down your site. DataDome also has a 24/7 SOC team and an easy-to-use interface, and it works on websites, mobile apps and APIs.

If you prefer an API-based approach, Castle is a lightweight system that detects and blocks large-scale bot attacks without using CAPTCHAs. It uses device intelligence and behavioral analysis to catch bad actors and offers real-time visibility into threats and targeted protection. Castle's pay-as-you-go pricing means it should be adaptable for large-scale use.