Evernote's machine-learning technologies are thought to include artificial intelligence hooks, such as searching with natural language queries.
The policy added that the few employees who will have access to user data will be "subject to background checks and receive specific security and privacy training at least annually."
Users can opt-out of the changes, but that won't stop Evernote employees from being able to access your data under other conditions, like with resellers, for sales and delivery requests, and law enforcement.
That means Evernote users are faced with the prospect of accepting the policy -- set to go into effect on Jan. 23 -- or exporting their data and quitting the service altogether.
Unsurprisingly, that hasn't gone down so well with the community.
Journalist and author Fabio Chiusi criticized the new terms of service in a tweet, arguing that users can choose between opting-out for privacy, but with a worse service, or accepting the terms and allowing employees to read their notes.
Others took to Twitter to voice their views about the new policy.
Evernote did not respond to a request for comment. We'll update if we hear back.