This question already has an answer here:
I interviewed for two different companies, one of them offered me a job, but the other one is still in the process, I know they liked me and I liked them very much, however, I do not know if it is appropriate to mention that I received an offer. I do not want to sound pushy. But I only have days to accept the offer from the other company. So I am not sure what to do. Any advice will be helpful. Thanks.