The full privacy policy is at https://pinsleuth.com/privacy/

Summary for the browser extension: the extension stores your PinSleuth API key in the browser's local extension storage and sends it to api.pinsleuth.com so we know it is you. When you open a keyword, pin or profile on Pinterest, it sends that keyword, pin ID or username to PinSleuth to look up. When you use the Pin writer on Pinterest's pin creation page, it sends the keyword you typed and, for scoring and writing, the title, description and link you have entered there. It does not read your Pinterest password, messages or any other page content, does not run on other websites, and contains no advertising or analytics. Data is used only to provide the features you asked for and is never sold or used for advertising. You can disconnect the extension from its popup at any time and request deletion of your data at hello@pinsleuth.com.