What is the difference between Polygon and zkEVM?

Could you please elaborate on the distinct differences between Polygon and zkEVM? As both are popular platforms in the blockchain and cryptocurrency space, I'm curious to understand the key factors that set them apart. For instance, how do their respective technologies, scalability solutions, and security features differ? Additionally, are there any notable use cases or projects that leverage each platform's unique strengths? I'm interested in gaining a deeper insight into these two platforms and their place within the broader blockchain ecosystem.