Privacy
Your presentation source stays under your control.
The Mac app and website do not use product analytics or tracking scripts.
Mac application
Preamble reads and writes Markdown files in the folder you select. It does not require an account, upload presentation content, or send usage events. Export runs on the Mac and writes the resulting HTML file to a location you choose.
Online editor
The browser editor stores its working draft in local browser storage. Preamble does not transmit the Markdown, filename, compiler messages, or exported presentation. Clearing site storage removes the saved browser draft.
Questions and changes
Privacy-affecting changes will be documented in the public repository before they reach a release.