My first batch of alpha testers came from a single Twitter reply [0] that got retweeted by a prominent person in the React community. It certainly helped that I had an okay Twitter following at the time (I think around 1k), but it doesn't need to be huge. You just need the right person to retweet you.

That was enough to iterate on until I had an MVP.

Then my Show HN [1] sent like 15k visitors in a day and that led to a ton of usage. I think something like 4k projects were created that day. I wasn't yet charging at the point, but probably for the best, since high usage meant a lot of feedback.

A few months later I launched on Product Hunt and that went well [2]. Beyond that, just improving the product every day, sharing my progress on Twitter, and trying really hard to turn every new feature into an exciting launch event.

I also started a React hooks blog [3] that sends me a handful of customers every month. I could probably do a better job of promoting Divjoy on there.

Haven't delved into SEO (barely rank for anything), content marketing, paid advertising, etc, so it's still very much a learning process for me.

[0] https://twitter.com/gabe_ragland/status/1108875975494795265

[1] https://news.ycombinator.com/item?id=20688044

[2] https://www.producthunt.com/posts/divjoy-4

[3] https://usehooks.com