Peerio limits data collection to the minimum service requirements. This includes the information you provide in sign-up and give as points of contact. This includes e-mail address, your username in Peerio, and your contact list in Peerio.
Peerio also collects limited metadata needed to deliver messages and files, this includes message and file timestamps, the number of messages in a conversation, the size of files, the sender and recipients of messages, and a user's IP address.
We do not, and cannot, collect any data related to the contents of your encrypted messages and files.