Most founders build first and validate later. They spend three months crafting something they're proud of, ship it, and then discover the hard way that nobody was actually searching for it, paying for it, or desperate enough to switch from whatever free alternative already exists. The brutal truth is that finding a profitable niche isn't about inspiration — it's about systematic signal detection. And if you learn to read the signals before you write a single line of code, you'll save yourself months of work and probably thousands of dollars.
This is the mental model that changes how you see the internet.
Stop Looking for Ideas. Start Looking for Pain.
There's a meaningful difference between an idea and a market signal. An idea is something you thought of in the shower. A market signal is evidence that real people are frustrated, underserved, or actively spending money to solve a problem that hasn't been solved well yet.
The shift in mindset is this: you're not an inventor, you're a detective. Your job isn't to dream something up — it's to find where the pain already exists and measure how loud it is.
This reframe matters because it changes where you spend your time. Instead of brainstorming sessions and whiteboard sessions with yourself, you're doing research. And that research has specific places it needs to go.
Where the Signals Actually Live
The internet is full of people complaining, asking questions, and describing their workarounds. That's gold. Here's where to find it systematically:
Hacker News is underrated for niche discovery. Most people read it for news. Smart founders mine it for frustration. Ask HN threads in particular are a treasure chest — people post "Ask HN: Is there a tool that does X?" and the answers (and upvotes) tell you exactly what the appetite looks like. Use HN Search to search historical threads. Try queries like "frustrated with", "wish there was", "does anyone know a tool that", or "why is there no". The results will show you unmet needs with real timestamps attached — you can see how long a pain point has existed and whether anyone has addressed it.
GitHub is where builders admit what's broken. The GitHub Issues section of popular open-source projects is one of the most honest places on the internet. When someone files an issue, they're documenting a real friction point. Look for issues with high comment counts and low resolution — that gap between demand and delivery is a potential product. GitHub Trending shows you what developers are building right now, which helps you identify adjacent spaces that are hot but not yet commercialised.
Stack Overflow's unanswered questions are a hidden map of confusion. Most founders ignore Stack Overflow Unanswered completely. That's a mistake. When a technical question goes unanswered for months, it often means the solution doesn't exist in a clean, accessible form. If you find a cluster of similar unanswered questions around a specific workflow, you're looking at a documentation gap or a tooling gap — both of which can become products. Stack Overflow at large also gives you volume data through question view counts. A question with 50,000 views and no great answer is a market signal with a number attached to it.
Product Hunt shows you what's already shipping — and what's missing. Browsing Product Hunt isn't just about seeing what's new. It's about reading the comments. The critical comments on popular products are often the clearest articulation of what people still need. "This would be great if it also did X" is someone handing you a product brief. Filter by categories you're interested in and look for consistent complaints across multiple products in the same space.
The Three Filters That Matter
Once you've gathered signals, you need to run them through a filter. Not every pain point is a business. Here are the three questions that determine whether something is worth pursuing:
1. Are people already paying for a partial solution? If someone is hacking together three tools, using a spreadsheet, or paying for something that only half-solves their problem, that's a strong signal. Free workarounds with friction are actually better than no solution — they confirm demand exists. A completely unsolved problem might be unsolved because there's no real market.
2. Is the audience reachable without a massive budget? Solo founders can't buy their way into markets. The niches worth targeting have communities — a subreddit, a Slack group, a conference, a mailing list, a specific corner of Hacker News. If you can't picture exactly where you'd post to reach your first hundred customers, the niche is probably too diffuse or too crowded.
3. Can you charge enough for it to matter? B2B almost always beats B2C on this front. If your target customer uses this tool at work, to save time, to make money, or to avoid a compliance problem, they'll pay more and churn less. A niche that saves a developer two hours per week is worth more than a niche that saves a consumer five minutes per day.
The Compound Advantage of Early Specificity
Here's something counterintuitive: the narrower your niche, the faster you grow in the beginning. A tool "for marketers" is invisible. A tool "for B2B SaaS founders running cold email campaigns without a dedicated sales team" is immediately interesting to a very specific group of people who feel completely seen by it.
Early specificity gives you three things: a clear customer to interview, a clear channel to reach them, and a clear story to tell. You can always expand later. You cannot easily fix the fact that nobody knows what your product is for.
The founders who get this right don't stumble into it — they've systematically observed where people are stuck, tested whether the problem is widespread and urgent, and built the smallest possible thing that addresses the core of that pain. The research phase isn't a delay to shipping. It's the work that makes shipping matter.
Put the Research on Autopilot
Manually tracking all of these signals across Hacker News, GitHub, Stack Overflow, and Product Hunt is exactly as tedious as it sounds. It's the kind of work that's important enough to matter but repetitive enough that it slips. That's the gap Niche Sonar was built to close.
Niche Sonar monitors the platforms where real demand surfaces — before it becomes obvious, before it gets crowded, and before someone else builds the thing you should have built. Instead of spending your Sunday morning manually running searches, you get distilled signals that help you evaluate whether a niche has real traction or just surface-level noise.
If you're pre-product and trying to get this right, or if you've already shipped something and you're wondering whether to pivot, the research process described above is exactly what Niche Sonar systematises for you.
Start finding signals instead of guessing. Try Niche Sonar free →