Can't speak for the OP, but as we do the same thing, figured I'd contribute our answer. We're not great at "sales", so it's been completely organic growth and

Can't speak for the OP, but as we do the same thing, figured I'd contribute our answer. We're not great at "sales", so it's been completely organic growth and word-of-mouth. I went to a lot of events and meetups for startups, and talked to people about what they were doing and what we do. I've also done a lot of open source development, including working on the Rails core team and building our own projects like Dynatable.js. This took a lot of time to cultivate a sales pipeline. The company was just me for the first 4 years, occasionally sub-contracting as needed. Then over the next 6 years, we grew to 6 people, and are currently in the process of finding a developer-consultant to join as our 7th.