We now have a total 1600 people in our waiting list and around 150 users trying our product in beta. This has been achieved with almost no marketing efforts.
I only used to post on my LinkedIn about Automation and lead generation and how TexAu makes life easier. All my posts received over 5000+ views and I added link to join beta in the posts. That's all.
LinkedIn posts are working well for us and we received around 300 signups from each post.