One place to find people interested in your project is at local meetups or computer user groups. Search meetups to find if there is one that gathers people on similar topics. Consider starting a meetup, too. You might offer to make presentation at your local Linux users group, for example. Your product/service would be of interest to people doing web startups, so try to track down meetups of those people. Search Twitter bios for relevant keywords, too. I use Followerwonk https://moz.com/followerwonk/bio Hope this tips are useful. Contact me at @philshapiro (Twitter) if you have follow up questions. I work as a public librarian and answer people's questions for a living.