Session does not collect any geolocation data, metadata, or any other data about the device or network you are using. There's also no requirement to use a phone number or email address to make an account, and your display name can be anything you want.
All messages, in both one-on-one and group chats, are end-to-end encrypted. Session also uses onion routing to ensure the message contents are only seen by the sender and recipient of the message.
Learn more about Session’s secure message routing here.