1. r/juststart
This subreddit is full of people building niche and affiliate sites who write dozens of articles a month. Self-promotion is restricted, so do not post a launch. Answer questions about content briefs or keyword clustering for a week, then post a specific ask like: "I built a tool that drafts articles from a keyword and SERP outline. Looking for 5 niche site owners to test it on real keywords and tell me where the drafts fail. Free, no card."
2. r/SEO and r/bigseo
r/SEO is broad and r/bigseo is stricter and more professional. Read the sidebar rules first, because both remove promotional posts quickly. Look for threads where people complain that AI content does not rank or reads as generic, and reply with what you learned building yours. Only offer access if someone asks, or message mods to ask whether a beta request post is allowed.
3. r/Blogging and r/content_marketing
These hold solo bloggers and in-house content marketers who feel the pain of producing posts on a schedule. Search the subreddit for "AI writer" and "content brief" to find people describing their current process. Comment on how they handle editing AI drafts, then DM the most detailed ones with a short, specific invite.
4. Indie Hackers
Many founders here run content-led growth for their own products and need blog posts but hate writing them. Post in the Growth or Product Feedback groups with a build-in-public update: what your writer does, one weakness you are working on, and a request for 10 testers. Indie Hackers welcomes this format if you share real lessons, not just a link.
5. Freelance SEO writer communities
Search Facebook for groups like "SEO Writers" or "Freelance Content Writers" and join a few with recent activity. Writers are a tough but valuable test group because they will judge draft quality hard. Pitch it as a speed tool for their first draft, not a replacement: "I am testing a tool that turns a keyword into an outlined first draft. Would any of you try it on a client brief and tell me what you would have to fix?"
6. Search X and LinkedIn for live pain
Search X for phrases like "writing 10 blog posts", "content brief template" or "AI content not ranking". On LinkedIn, search job titles like Content Marketing Manager, SEO Specialist and SEO agency founder at small companies. Reply or message with a reference to what they actually posted, and offer one free article written on a keyword they choose.
7. Product Hunt and BetaList
BetaList is built for exactly this: submit your pre-launch product and early adopters sign up. Product Hunt also has discussion threads where makers ask for feedback on tools. Use these for volume, then hand-pick the testers who actually run sites and write regularly.
8. Keep it going daily
Finding testers is not a one-time post, it is 30 minutes a day of searching, replying and following up with people who signed up but never used it. Hulby, an AI cofounder, does this daily for founders, finding these conversations and drafting replies for you to approve.
People asking this right now
Real, public posts from the last few weeks. Each one is somebody you could help today.
Mistakes to skip
- Dropping a link in r/SEO or r/juststart without reading the rules and getting banned on day one.
- Recruiting anyone who signs up instead of people who actually publish content to rank.
- Asking "what do you think?" instead of asking them to test it on a real keyword they need.
- Not following up, so most testers sign up and never generate a single article.
Want this done for your AI SEO writer, every day?
Hulby finds the people asking for what you built, writes every reply and email, and keeps you on it until they pay. Free to start.
Find my first customersQuestions
How many beta testers do I need for an AI SEO writer?
Start with 10 to 20 active users who publish regularly. That is enough to see repeated quality problems in the drafts.
Should I pay beta testers?
No. Offer free access during the beta and a discounted plan after. People who want the tool will test it for that.
Who gives the most useful feedback?
Niche site owners and freelance SEO writers. They know what ranks and what a client would reject.
How do I avoid looking spammy on Reddit?
Read the rules, comment helpfully for a week first, and make specific asks. Message mods if you are unsure a post is allowed.