Is a philosophy, not a religion

Philosophy is the study of general and fundamental problems concerning matters such as existence, knowledge, values, reason, mind, and language.

Religion is a cultural system of behaviors and practices, world views, sacred texts, holy places, ethics, and societal organisation that relate humanity to what an anthropologist has called "an order of existence.

so the answer is no: philosophy is not a religion.

Philisophy and religion both involve a set of beliefs revolving around the universe. Both usually apply some form of a moral code about human behaviors. FYI: Christianity is not a religion; it is a personal relationship with God.