Is BitPay the same as Bitcoin?

Excuse me, could you please clarify something for me? I've been hearing a lot about BitPay and Bitcoin, but I'm a bit confused. Are BitPay and Bitcoin the same thing? I understand that Bitcoin is a digital currency, but what exactly is BitPay, and how does it relate to Bitcoin? Is BitPay some kind of service that uses Bitcoin, or are they completely separate entities? I'd appreciate it if you could help me understand the difference between the two.