NGINX Plus is the complete application delivery platform for the modern web. Get enterprise-ready features and support to get your app up and running in minutes:
- High-performance load balancing - Intelligent session persistence - Application-aware health checks - High availability deployments modes - Massively scalable content caching - Sophisticated streaming media - Advanced activity monitoring - DevOps on-the-fly reconfiguration
Costs start from around $2,500 per year - nginx.com 
# See also - Nginx - Dynamic Nginx Reconfiguration