Best DDoS protection of 2019

In October 2016 DNS provider Dyn was hit by a major DDoS (Distributed Denial of Service) attack by an army of IoT devices which had been hacked specially for the purpose. Over 14,000 domains using Dyn's services were overwhlemed and became unreachable including big names like Amazon, HBO, and PayPal. According to research by Cloudflare the average cost of infrastructure failure to businesses is $100,000 (£75,000) per hour. How then can you make sure that your organization doesn't fall