Early 2013, we started working on what it would become an awesome project, MailWizz.
At that time, we were looking for a very small, self-hosted email marketing software.
We wanted basic functionality, which would allow us to use it for our customers and their needs. Our customers did not want to get locked into an external email marketing software.
Our searches have found a few viable self-hosted email marketing systems. After much testing and inspection, none of them met our standards, they all had various issues. Bad documentation, bad ui/ux or coding standards, and the list can go on.

This was a problem for us because we couldn't give guarantees to our customers for any of these platforms. So we took the decision to start working on a platform which we would use for our purposes only.
By the end of 2013, in November, we had a basic product which worked fine for our needs. It was a great moment. The product was so good that people seemed interested to use it more and more. This is when we decided to make it public and sell it.
With a public project, our new customers started to ask for new features. And we listen to our customers. Adding feature after feature, in the end lead us to the full featured product we have today.