HAProxy vs. NGINX
If you want to use NGINX for both web serving and load balancing, you can. A more optimal solution would be to use HAProxy for load balancing and NGINX for serving web pages.
- Load balancer
- More fully featured load balancing
- Generally considered a better load balancer
- PROXY protocol support
- NOT a web server
- Better status page
- Better third party integration
- Web server and load balancer
Keep in mind there is a free version and NGINX Plus.