No sign-up. What you type stays in this tab. Nothing is saved or sent. Close the tab and it is gone. Fill in only what you want to show.
Who is it for
This person
Your team list
One row for each person. The first row has the column names: name, title, phone, email. You can add company, website, address and logo too.
Same for everyone
Logo
Use a public link that starts with https://. Mail apps load the logo from this link. Your browser loads it too, to show you the preview.
New hire, new title, new logo. Then what?
A list works today. Brand OS Portal has Signature Builder. Each person opens one link and gets the right signature, next to the rest of your brand tools.