Quick answer
Use Reddit for emotional, story-rich pain and niche workflows; Hacker News for tech-industry discourse, launches, and blunt feedback; Stack Overflow for specific technical failure modes and API/library confusion. For B2B devtools, the highest-confidence roadmap signal often comes from combining SO precision with Reddit/HN context - never from one surface alone.
Best for: teams selling to engineers, data practitioners, or technical buyers who compare tools in public.
Platform “best for”
| Platform | Best for | Weak for |
|---|---|---|
| Long narratives, budget talk, “what should I buy”, niche subs | Representative sampling of enterprise IT if threads are consumer-heavy | |
| Hacker News | Launch feedback, industry trends, founder peer tone | Deep, library-specific debugging threads (often on SO instead) |
| Stack Overflow | Exact errors, minimal repros, API misuse patterns | Brand storytelling, non-technical personas |
Decision guide (if / then)
- If the question is “why do people churn after week one?” → start Reddit + HN for narrative, then SO if the product is API-heavy.
- If the question is “which SDK edge case blocks adoption?” → start SO, then GitHub issues.
- If the question is “what did people think of competitor X’s pricing change?” → HN + Reddit threads about the announcement.
Official norms: Stack Overflow code of conduct; read each subreddit’s rules; HN guidelines are posted on Y Combinator’s Hacker News.
Etiquics
- Do not brigade or astroturf.
- Disclose affiliation when discussing your own product.
- Prefer improving public knowledge (docs, examples) over arguing in threads.
Using Needle across surfaces
Run one query in Search and compare how the same keyword behaves per community. Solo plans include a subset of platforms and lower daily search caps than Growth and Scale; Stack Overflow and Hacker News availability for search is included on standard paid tiers in the current plans.js configuration - verify any change on Pricing.