After nearly a year of development, I've launched Problem Spotter - a tool that helps you discover relevant Reddit communities and track their growth patterns.

Key features: - Search across subreddits by topic/keyword - Monthly subscriber growth tracking and trends - Audience overlap analysis

Built this because I was manually hunting through Reddit for market research and community validation. The existing tools either didn't have good search or lacked growth data.

Would love feedback from the HN community - especially if you use Reddit for research or community building.

Link: https://problemspotter.co