AWS offers three managed load balancers:
Application Load Balancer (ALB): Layer . Routes based on URL paths, headers, and hostnames. Best for HTTP/HTTPS traffic.
Network Load Balancer (NLB): Layer . Handles millions of requests per second with ultra-low latency. Best for TCP/UDP traffic.
Classic Load Balancer: Legacy option supporting both layers. AWS recommends ALB or NLB for new projects.
All three integrate with Auto Scaling, health checks, and SSL certificates. You pay per hour plus per GB of data processed.