Which company is best for data science job?

"Best" is a relative term, my friend. For some, Google might be a paradise, for others, it's a hellhole. It all depends on your priorities. Do you want a hefty paycheck or a balanced life? Or perhaps, you're one of those who value learning over everything else? So, before I can answer your question, you need to answer mine. What are your priorities? And remember, "Sab moh maya hai" (Everything is an illusion).