Reddit vs Hacker News: Find Your Next SaaS Idea

Two Platforms, Two Very Different Signals

Reddit and Hacker News are probably the two most useful platforms for finding startup ideas. But they work in completely different ways, attract different audiences, and surface different types of opportunities.

If you're only checking one of them, you're leaving ideas on the table. Here's a breakdown of how to use each effectively.

Reddit: Volume and Specificity

Reddit's biggest strength is its niche communities. There's a subreddit for nearly every profession, hobby, and industry. That specificity is incredibly valuable when you're looking for problems to solve.

Best Subreddits for Idea Discovery

r/SaaS — Founders sharing what they're building, asking for feedback, and discussing what works. Good for understanding the competitive landscape and finding gaps in existing products.

r/startups — Broader startup discussion. Pay attention to the "Share Your Startup" threads and look for patterns in what's getting traction.

r/SideProject — Solo developers launching small products. The comments are gold — when people say "I wish this also did X," that's your feature gap.

r/smallbusiness — Business owners talking about their actual problems. These aren't tech people. They don't care about your stack. They want tools that save them time. Posts like "I spend 3 hours a week on payroll" are pure signal.

r/Entrepreneur — Hit or miss. Lots of generic advice posts, but the specific problem descriptions are worth filtering for.

Industry-specific subs — r/realtors, r/dentistry, r/restaurateur, r/freelance, r/sysadmin. These are where the really niche, high-value problems hide. The audiences are smaller, so fewer founders are paying attention.

What to Look For on Reddit

Search for phrases like:

"Is there a tool that..."
"I wish there was..."
"I'm so frustrated with..."
"We switched from X to Y because..."
"Any alternatives to..."

Sort by recent, not top. The top posts are usually memes or success stories. The fresh posts with 5-20 upvotes are where people are actively describing problems they have right now.

Hacker News: Technical Depth and B2B Signal

Hacker News attracts a different crowd. Software engineers, technical founders, VCs, and startup operators. The discussions skew toward developer tools, infrastructure, and B2B products.

Where to Look on HN

Show HN — People launching their projects. The ones that hit the front page resonate with the audience. But also look at the ones that don't — sometimes a good idea has bad positioning, and you can do it better.

Ask HN — Direct questions to the community. "Ask HN: What tools do you use for X?" and "Ask HN: What's your side project?" are goldmines for understanding what technical users need.

Who is hiring threads — Published monthly. The job descriptions reveal what companies are building and what problems they're solving. If you see the same role posted across five companies, that's a problem area worth exploring.

Comment threads on popular posts — When a post about a new tool or product hits the front page, the comments are full of people saying what they'd do differently, what features are missing, or what adjacent problems they have.

What Makes HN Different

HN users tend to be more technical and more skeptical. They'll tear apart bad ideas, which is actually useful. If your idea survives the HN comment section, it probably has legs.

The downside: HN skews heavily toward developer tooling. If you're looking for B2C consumer ideas, Reddit is better. If you're looking for B2B or developer-focused SaaS opportunities, HN is unmatched.

Head-to-Head Comparison

Audience breadth: Reddit wins. You can find communities for literally every niche. HN is mostly tech and startup focused.

Signal quality: HN wins. The audience is more experienced with software, so their feedback tends to be more actionable. Reddit has more noise — you need to filter harder.

B2C opportunities: Reddit wins. Millions of consumers talking about their daily frustrations across thousands of communities.

B2B and developer tools: HN wins. The audience builds and buys business software. Their opinions on tooling carry weight because they're the actual users.

Speed of trend detection: Reddit wins for broad trends. HN wins for tech-specific trends. A new AI capability will show up on HN first. A new consumer behavior pattern will show up on Reddit first.

Competitive intelligence: Both are useful. Reddit for understanding what end users think about existing products. HN for understanding what builders think about the market.

A System That Uses Both

Don't pick one. Use both, but with different lenses.

Spend 30 minutes on Reddit three times a week. Focus on industry-specific subs and search for pain-point language. Track everything in a spreadsheet.

Spend 20 minutes on HN daily. Read the front page, scan Show HN and Ask HN, and dive into comment threads on topics you find interesting.

Cross-reference. If the same problem shows up on Reddit (from end users) and HN (from technical users), you've found something significant. That convergence is rare and valuable.

Or Let Software Do It for You

The manual approach works well, but it takes time. If you want to speed things up, ZeroToShip automates this entire process. It scrapes Reddit, Hacker News, and GitHub daily, clusters pain points, and delivers scored startup ideas with business briefs every morning.

Think of it as the automated version of the manual system described above. Same methodology, but running 24/7 across hundreds of posts instead of the handful you can read yourself.

The Key Takeaway

Reddit gives you breadth and consumer insight. Hacker News gives you depth and technical signal. The best startup ideas emerge when you combine both — when end users are complaining about a problem and technical users are discussing why existing solutions fail.

Start mining both today. The ideas are out there, hiding in comment threads and complaint posts. You just have to show up consistently and pay attention.