HAProxy is really powerful load balancing software. Not only does it go above and beyond on features but it handles a really large volume of traffic on very little compute. For example I ran a site with 350hits/sec base traffic (that regularly bell curved up to 500hits/sec) on 4 HAProxy instances running on t3.micro EC2 instances and I was terminating TLS on 20,000 domains at HAProxy. And if you’re in a position where you need to pay for support they will bend over backward to help.