A subreddit finder that points at real demand, not just topics.
Most subreddit finders give you a list. r/SaaS, r/marketing, r/startups. Cool. The problem is that knowing the room exists doesn't tell you whether anyone in it wants what you're building. Gorilla flips that. Paste your idea, and it returns the subreddits where people are actively asking for it, with the exact posts and intent scores attached.
What is a subreddit finder?
A subreddit finder is a tool that helps you discover Reddit communities relevant to a topic, niche or product. The basic version is a directory: type a keyword, get a list of subreddits sorted by size or activity. That's useful for orientation, less useful for action. If you're a founder hunting for first users, or a marketer looking for the right rooms to engage, you don't really need a list of 200 subreddits. You need the 5 or 10 where your buyers actually post. The good finders narrow down the list. The great ones tell you what's happening inside each one this week, not just how big it is.
How to find the right subreddit (5 tactics that actually work)
1. Start from your buyer's exact wording. Don't search "B2B SaaS." Search the phrase your buyer would type at 11pm when they're frustrated. "Tired of HubSpot pricing." "Looking for a Notion alternative for solo PMs." Those phrases live in specific subreddits. Find the phrase, find the room.
2. Mine the comments of posts you wish you had written. Pick a post that hits your niche perfectly. Open the comments. Note which other subreddits the commenters mention. That cross-pollination is gold and no directory will surface it.
3. Use Google's site: operator. site:reddit.com "alternative to [competitor]" will show you every subreddit where someone has asked about leaving your competitor. That's a target list.
4. Sort by intent, not by size. r/SaaS has 380k members and rewards launch posts. r/microsaas has 30k and rewards technical depth. Bigger isn't better. The right subreddit is the one where your specific phrasing of the problem already shows up.
5. Watch the recurring askers. Founders like @_ayinla__ and @jam_thecreator (both shipping in public on X and Reddit right now) post the same shape of question across multiple subs. Track those threads. The replies tell you which sub is the most generous to your kind of post.
Why most subreddit finders miss the mark
The standard subreddit finder lists rooms. That's it. You get size, age, maybe a one-line description. What you don't get is the answer to the only question that matters: does anyone in here want my thing right now? A 500k-member subreddit with zero recent buying-intent posts is worse than a 5k-member sub where three people this week asked for exactly what you're building. Gorilla's wedge is that it doesn't stop at the directory. It scopes Reddit searches to the subreddits it picks, scores every post for intent, and hands you a ranked list of posts inside the right rooms. The subreddit is just the container. The post is the lead.
Live example: the 7 subreddits every founder should know
- r/SaaS. 380k+ members. Best for launch posts, pricing debates, and asking "what tools do you use for X." Big audience, fast scroll.
- r/SideProject. Friendliest room on Reddit for "I built a thing." Great for first feedback. Less great for serious sales.
- r/microsaas. Technical, niche, hands-on. People here actually ship and post real numbers. High signal.
- r/EntrepreneurRideAlong. Long-form storytelling sub. Posts with funnel breakdowns and dollar amounts win here. See the recent thread "6 weeks in as a solo founder. Here's every drop-off in my funnel."
- r/indiehackers. Smaller and more focused than r/Entrepreneur. Conversational tone. Good for "what would you do" posts.
- r/buildinpublic. For sharing weekly progress, MRR updates, and shipping notes. Audience expects vulnerability and numbers.
- r/marketing and r/AskMarketing. Where pre-revenue founders go when they have traffic but no conversions. Fertile ground if your product touches acquisition.
That's the starter pack. Run Gorilla on your specific idea and you'll get five more you didn't know existed, ranked by how many people in each one are asking for what you build. We've also broken down full real runs by niche on find users if you want to see what the output looks like before you pay anything.
Run Gorilla on your idea to find the exact subreddits where people are asking for it.
Run Gorilla ($0.99)