Connecting a Google account is optional. If you connect one, the app uses it only for the workflow steps you build, such as reading new emails or adding a row to a sheet.
That data moves directly between your computer and Google. We never receive it, and we don't sell it or use it for ads. You can disconnect the account in the app at any time, or remove its access in your Google account.
While Google reviews the app, only people on our test list can connect a Google account. Any other email account works through IMAP and SMTP. The privacy policy has the full details.