I work in Company A and I'm kind of the star there (I feel it is mainly due to political reasons). Recently, I received an offer from Company B and I decided to accept it. HR department in my current company pushed me to review my decision and propose conditions under which I would like to stay at company. 

I feel that offer from Company B is much better for my career (project is more interesting, company is also a better suit for me), but I don't want to burn bridges. How can I respond?
['https://workplace.stackexchange.com/questions/78863', 'https://workplace.stackexchange.com', 'https://workplace.stackexchange.com/users/-1/']
First of all, you don't have to tell Company A anything except the last date you'll be working for them.

However, you *could* say something to the effect of

> 
> I see this as a personal growth opportunity and a chance to experience different corporate cultures and different ways of doing things. I've thoroughly enjoyed my time at Company A (*don't say this if it isn't true!*), and may consider working here again some time.
> 
> 
> 

The idea is to spin this as "some years from now I'll be more valuable to you if I have this experience than if I stay here" - kind of like taking a really long sabbatical. Just don't be specific
You just have to spin up a bunch of nonsense that you probably don't mean. Something like, "While I am grateful for the opportunities that were presented to me during my time here - I feel that at this juncture its best for all parties if I move on" Then say something about how you will do all you can to transfer knowledge and help in the transition prior to your departure

Then in your exit interview you say a bunch of nice things and leave.