Before you build your bot I recommend creating a landing page and submitting it to Betalist, or other similar places to start building an email list. It’s a good way to begin getting feedback on your idea. Once your bot is available you should try to get it featured on Product Hunt. With Product Hunt you’ll get a surge of traffic, and you’ll find some of your biggest promoters there. Also, submit your bot to all of the bot directories. These include: BotPages, Bot Family, Slack Stack. There are new directories popping up every day.