EC2 vs Lambda — When to Use Which (With Real Examples)

The question every AWS developer gets asked. Here's the honest, practical answer. The Confusion Is Real When I first started learning AWS I was genuinely confused. Both EC2 and Lambda run your code on AWS infrastructure. Both scale. Both are used by millions of companies. So why do both exist? When do you use one over the other? I spent weeks reading documentation and tutorials that gave me theoretical answers but no real clarity. So I built things with both. Made mistakes with both. And now I'm writing the guide I wish existed when I started. Let's settle this once and for all. 🚀 Quick Overview — What Are They? EC2 (Elastic Compute Cloud) EC2 is a virtual server in the cloud. Think of it like renting a computer from AWS. You get a machine with a specific CPU, RAM, and storage. You install whatever you want on it. You run whatever you want on it. It runs 24/7 until you stop it. You are responsible for: The operating system Installing software Managing updates Scaling when needed Securi