Is Deribit centralized?

Could you please clarify for me if Deribit operates as a centralized entity within the cryptocurrency exchange space? I'm particularly interested in understanding the architecture and governance model behind Deribit, as well as any potential implications for traders and investors who choose to use its platform. It would be great if you could elaborate on the key differences between centralized and decentralized exchanges, and how Deribit specifically fits into this landscape. Thank you for your time and consideration.