Fact · Voice privacy and security
In the same Stanford study, only some of the six AI developers say they remove personal information before using data for training.
Checked against its source on October 17, 2026
In the source's own words
“Some, but not all, of the companies state that they de-identify personal information before using it for training purposes.”
Be Careful What You Tell Your AI Chatbot, Jennifer King and Stanford Institute for Human-Centered Artificial Intelligence, Stanford Institute for Human-Centered Artificial Intelligence (HAI), 2025, Section: Blurred Boundaries.
Open the original- What it measures
- This is the study's finding about de-identification in written policies. It means that for some vendors, a policy does not say anything about de-identifying data before training.
- What it does not show
- A policy that does not mention de-identification does not prove that identifiers are kept. It only means the written commitment is missing.