AWS EC2 has very short term pricing. I know there's more fancy services on top of that as well, depending on exactly what you need to do and how you want to run

AWS EC2 has very short term pricing. I know there's more fancy services on top of that as well, depending on exactly what you need to do and how you want to run it. I'd think the other cloud providers would have similar capabilities, though I don't personally know them.