Research
The API searches Reddit for discussion of your topic and ranks the communities by how much of it is happening there.
Free to start — 150 credits on signup, no card.
What it does
Active subreddits
ranked by real discussion volume
Recent threads
so you can read the room first
Subscriber counts
to size the opportunity
Behind the tool
Every tool here is a thin interface over the same public API you can call yourself. If you want the output in your own software rather than a form, the quickstart gets you a working request in about a minute, and pricing is per call — one-time packs, with optional auto-recharge.
More research tools
150 free credits and a ready-made key the moment you sign up. No card.