Is SWIFT and ACH the same?

I'm curious to understand the differences between SWIFT and ACH. As a professional in the field of cryptocurrency and finance, I've heard these terms used interchangeably at times, but I'm not entirely sure if they serve the same purpose. Could you clarify if SWIFT and ACH are essentially the same system for international and domestic payments, or do they have distinct functions and operational mechanisms? I'd appreciate a concise yet thorough explanation of their differences and how they're typically used in the financial world.