Cloudflare WAF is the industry leader and the best thing is they provide a number of services along with WAF like DDoS protection, Bot protection, etc. and their DDoS protection solution is best compared to other vendors, and licensing cost is also good, we can easily integrate Cloudflare WAF and other services if we are using Cloudflare hosting plus they provide a number of other services in one place so it is an easy to set-up

Cloudflare's DDoS Protection improves website performance. With DNS redirection as its foundation, CloudFlare is primarily deployed in the cloud (Web Protection). Easy integration for existing deployments, DNS redirection, and an intuitive monitoring and configuration portal. It improves server and user database and credential security. Cloudflare protects our business-critical portals and APIs from internet-based attacks. It tells us where and from what IP address someone is trying to get to our website so that we can block their access. It defends our website against DDOS attacks of the HTTP, SSL/TSL, and network layer varieties. It automatically finds attacks and stops them. It takes the security of our website to the next level. Cloudflare DDoS Protection is the best value.

Simplicity with which it helps in preventing data loss, malware & phishing, and the way it protects the on-site and remote workers systems. Its also very easy to setup.