How did you acquire your first 100 users?

Blogging.

I wrote articles for my blog 10mo before launch and built up a list which I launched to at a discounted price (for a limited time) before going full-time. Resulted in profit from day one. I grew that business to multi-millions before selling and now I'm repeating the exact same process with my current company, GapScout.

This is going to be unpopular, but all I did was listened to my first 10-20 users, improved the product, added more features, and let word-of-mouth marketing do its magic.

I hope, this helps you
https://blog.saasmantra.com/gain-users-for-your-saas-product/
:) :)

Instagram influencing

We built a small following by posting useful tips and funny videos on Instagram before we had built the product.

Once the product was ready, we collaborated with influencers to make a video ad that we posted as a shared post onto Instagram, as well as into relevant Facebook groups.

That got us over 100 sign ups. Since then we’ve been getting more and more sign ups by linking our product in the Instagram bio and occasionally mentioning it in the posts.

The first 100 users are tough but you can do it the old-school way.

Incentivize new users who refer you to other people with a feature on your SaaS.

For example, Clickfunnels has an affiliate program that you can sign up for.

You refer people through your link, and if they become paid users, you get paid a certain %.

You can do it for free as well.

Ask them to refer your SaaS to 5 of their friends.

And extend their free trail by 30 days or give them a discount for doing this.

Get yourself a gun, and head on downtown. Then when you see someone, point the gun at their head and say "Sign up for my app". You'll be amazed how many people do it.