How to stop Synthesia training AI on your data
What the policy itself says, plan by plan. Where Synthesia publishes the steps, they're here in its own words, read from an archived copy of the page that gives them. Where it doesn't, this page says so instead of inventing a menu path.
Your likeness (Biometric Data)
Nothing to switch off: training here is off until an opt-in is given.
"We and our vendors will store and use the Biometric Data described above only until it is no longer needed for the achievement of the above listed purposes."
Scripts, uploads and finished videos (Customer Data)
The policy names this data and then hands it to a document the reader can't see. It defines Customer Data as the "audio, video, text, and scripts used to prompt Avatars to speak and perform", the files uploaded and the videos produced. Then it says a separate Agreement may govern its processing, that the Customer who signed that Agreement "controls its instance of the Services and any associated Customer Data", and that privacy questions should go to that Customer. For most users the Customer is their employer. So the answer here is a deferral, to terms a user has no right to read and didn't sign. Synthesia told us in writing on 28 Aug 2026 that none of this data reaches pre-training. That's a good answer, and it isn't in any document a user could hold Synthesia to.
Did a step here not work, or does Synthesia offer a control this page doesn't mention? Tell us and we'll correct it.