Some messengers, such as WhatsApp, have deployed end-to-end encryption in an attempt to alleviate user concerns about privacy and security. However, simply encrypting the contents of user messages doesn't fix the wider underlying issue: the companies that operate these services can still see massive amounts of metadata about their users' messaging activities. This metadata can include user IP addresses and phone numbers, the time and #️quantity of sent messages, and the relationship each account has with other accounts. Increasingly, it is the existence and analysis of this metadata that poses a significant privacy risk to journalists, human rights activists, and other groups with a real need for private communications.