DeepSeeks Privacy Policy
Check out their Privacy Policy page and walk away.
'Technical Information. We collect certain device and network connection information when you access the Service. This information includes your device model, operating system, keystroke patterns or rhythms, IP address, and system language. We also collect service-related, diagnostic, and performance information, including crash reports and performance logs. We automatically assign you a device ID and user ID. Where you log-in from multiple devices, we use information such as your device ID and user ID to identify your activity across devices to give you a seamless log-in experience and for security purposes.'
https://chat.deepseek.com/downloads/DeepSeek%20Privacy%20Policy.html
The bonus is that all of your data goes straight to the Chinese Government aka the CCP.