How do you choose subreddits for marketing?
TL;DR
Generate candidates from your customers' identity and pain language, not your product category, then vet each community on four checks: posts per day, share of posts that are questions, comment depth, and the sidebar's promotion rules. Mid-sized communities usually beat giant ones for marketing, because genuine answers stay visible there and buying questions actually get asked.
Category names are a dead end
The most common mistake is searching Reddit for your product category. A team selling invoicing software searches "invoicing", finds two dead subreddits, and concludes Reddit doesn't work. Their buyers were in r/freelance and r/smallbusiness the whole time, asking payment questions weekly. Communities are named after who people are, not what you sell.
Generate candidates from three lists: identity words (who is the buyer), job words (what are they doing when your product becomes relevant), and pain words (what do they type when it breaks). Google's site:reddit.com "<pain phrase>" surfaces the communities where those conversations rank.
The four vetting checks
Subscriber count is a lifetime metric and nearly useless. Check instead:
| Check | Pass looks like |
|---|---|
| Posts per day (sort by new) | 10+ daily; one post a week is a dead room |
| Question density | A meaningful share of the last 50 posts ask for help or recommendations |
| Comment depth | Real back-and-forth, not empty threads |
| Promotion rules | Sidebar allows contextual mentions, or has a promo thread |
Expect to cut two-thirds of your candidates. The full workflow, with the free tools for each step, is in our subreddit finder guide, and the per-industry starting map is in best subreddits for lead generation.
Choice is temporary, monitoring is permanent
Communities drift. Moderation changes, activity migrates, new subreddits appear around new tools. The durable setup is a shortlist you revisit monthly plus software that reads it daily. Grabbit suggests feeds from your business description at setup and then monitors your chosen subreddits on a schedule, so a good choice today keeps paying without a standing browse habit.
Last updated 2026-07-15