Writely was Sam Schillace's web-based word processor startup that was later acquired by Google and became Google Docs.
When we did Writely at the beginning, we didn't even ask for an email address, because it was such a novel thing. We didn't want any friction at all in the onboarding process. So you could just come in and make a document and start using it without telling us anything at all about yourself. And after about two minutes of typing, if you're still there, we'd very gently just say, 'Please give us your email address, no password, no anything.'