ReachDex is a tool for solo devs and indie founders stuck at $0 MRR. You paste your product URL, and it reads your actual site to figure out what you sell and who you sell it to. Then it runs live searches across Reddit, Hacker News, X and YouTube to find where your buyer already gathers. Every community is checked against real APIs for member counts, self-promo rules, and recent threads, each stamped with the date. You get a one-page playbook: your ideal customer, ranked channels, paste-ready messages in each room's voice, and a phased $0 roadmap. Reports run about 2 minutes, $29 each, no subscription.