Unlike the Satanic Temple, the Church of Satan employs a hierarchical leadership system of priests and priestesses who advocate for Satan as a symbol of "pride, liberty, and individualism," according to its website. As a matter of policy established by LaVey that was intended to keep the group relatively amorphous to outsiders, it does not disclose membership numbers. Neither the Satanic Temple nor the Church of Satan have physical places of worship, despite what their names might suggest.
Because they're both organized around Satanism, it's not uncommon for one group to get mistaken for another. "It happened a couple times in the beginning where people were like, 'Of course there's high priests or priestesses,' and we were like, 'No, this isn't a role-paying game. This is an academic, historically safe form of Satanic practice. Therefore, those portrayals are absurd and unnecessary,'" says Blackmore, the Satanic Temple spokeperson.