How do founders build a successful SaaS with no audience at all?

I am curious how people actually do it.

There are tons of stories about founders launching SaaS products without an existing audience. No Twitter following, no newsletter, no community, nothing. Yet some still manage to get early traction and even hit real MRR.

If you have started from zero, I would love to hear:

• How you got your first users

• What channels brought the earliest traction

• Whether cold outreach works or not

• If content played a role or if you focused mainly on building

• What you would do differently if you had to start again

This is a general question for anyone in the community. I want to learn how people approach the very early stage when nobody knows you exist.

Any experiences or lessons are welcome.