At the annual developer conference (WWDC), the iPhone maker announced Apple Intelligence, an AI system that provides impressive AI functions and experiences. Most of the AI functions are processed locally on the device. But to handle complex requests, Apple Intelligence uploads them to Apple's cloud, known as Private Cloud Compute.

Apple has built its own Private Cloud Compute (PCC), a cloud server for secure AI processing. It hosts Apple's large server models while Apple devices locally run a 3D parameter model. Apple's server models are said to compete with OpenAI's GPT-3.5-Turbo and Mixtral-8x22B models.

It is clear that Apple tries to assure users that none of the user's personal data is sent to third-party cloud servers. Many companies rely on cloud services such as Microsoft Azure and Google Cloud to process AI requests. With internal Apple servers and the company's long history of protecting user privacy, users are likely to trust Private Cloud Compute with their personal data.

Simply put, Apple's Private Cloud Compute (PCC) is a cloud server, built from the ground up by Apple to process AI requests securely and privately. From hardware to software, Apple has built the entire PCC stack in-house. With PCC, Apple aims to give user data privacy similar treatment on the device.