Jeed builds BlueTicks for Gmail, a Chrome and Firefox extension that shows WhatsApp-style read receipt ticks in your Gmail sent list: one tick when a message is sent, two when it has been opened.

The design choice that defines it: it never asks for access to your Google account, it never stores the content of your emails, and it adds nothing to the messages your recipients receive. No tracking signature, no footer, no branded link.

It costs 4 dollars a year and there is a free tier.

BlueTicks for Gmail is not related to the WhatsApp scheduling extension of the same name, nor to the email follow up tool with the singular name. Different products, different makers.

More at https://blueticks.io