We recently hit a nice milestone for ManyRequests: 1000 signups.
Here are a few things we did to acquire our users:
Facebook group. Three years ago (long before we started our SaaS), I started a Facebook group about productized services. Here's how we grew our group: https://twitter.com/Vinrob/status/1355050202399465473
SEO. We started about a year ago and have just started seeing the results in the past few weeks. Write content that helps your audience. We used Facebook groups, Ahrefs, and Quora/Reddit to find content ideas.
Building our email list. I wrote a few free books, then each leads get added to an email auto-responder. Email leads then start a trial.
Let me know if you have any questions.
email list, ftw.