Anything that gets access to my E-mails and isn't an all-local app with local processing instantly raises a red flag. My E-mail is not something I want out there in public. A quick glance at the page doesn't tell me if this thing processes my E-mail online, or locally, and what data gets shared where and with whom.
I completely understand your concerns. Your emails aren't sent anywhere; they are processed on our server. We have our own ML model so we don't share any of your data with a third party. Moreover, we don't store the content of your email. We just give emails scores based on various attributes and those scores are used to make all the predictions.
They are sent to your server. Which means they are being sent somewhere.
Seriously? Something tells me you picked the wrong crowd to be dissembling with....