Live — monitoring 4,200+ threads/week

People are asking for
your product.
You're not there.

Build Signals monitors Hacker News 24/7 and alerts you when real people describe tools they'd pay for — before anyone else builds them.

Get full access — $147 lifetime

See all signals. Build faster.

The preview above is one signal. Subscribers get everything.

  • ✓
    Full signal history

    Every opportunity we've ever flagged, searchable and unblurred.

  • ✓
    GitHub solution links

    See which problems already have repos — and which are wide open.

  • ✓
    Daily updates

    Fresh signals every morning. Never miss a window again.

  • ✓
    Search & filter

    Filter by category, source, date, and solution status.

$147

One-time payment. Lifetime access.

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Here's what you missed

Real threads. Real demand. Zero solutions offered.

SaaS 5 days ago

"Is there a tool that monitors competitor pricing automatically?"

A founder posted asking for automated competitor price tracking across 50+ websites. The thread got 200+ upvotes. Multiple founders replied saying they'd pay $50-100/month for this. Not a single person linked to an existing solution.

The thread sat there for three days. Someone with a web scraping background could have had a landing page and waitlist up in 48 hours. Instead, the thread aged off the front page and the moment passed.

No solution mentioned
Automation 3 days ago

"I'd pay good money for a Zapier alternative that actually handles errors well"

A developer vented about Zapier's silent failure modes. The thread exploded — 340 points, 180+ comments. Reply after reply from CTOs and lead engineers saying they'd switch in a heartbeat if error handling was the core differentiator.

This isn't a feature request. It's a validated market gap described by the exact people who'd buy it. The signal was there for anyone watching.

No solution mentioned
Dev Tools 6 days ago

"Ask HN: How do you manage multiple AI API subscriptions and costs?"

With teams now juggling OpenAI, Anthropic, Gemini, and Mistral keys, a CTO asked how others track spend across providers. 490+ points. The replies were all manual spreadsheets and custom scripts. A unified AI cost dashboard doesn't exist yet.

No solution mentioned

This is one week. Build Signals runs every day.

"You think you're looking at a Hacker News monitoring tool."

You're actually looking at a real-time map of where demand exists and supply doesn't — updated every day, filtered to only show threads where someone is actively describing a problem they'd pay to solve.

📴

The Manual Scroller

Browses HN 30-60 min/day hoping to stumble into something relevant. Hit rate: 1 in 50 sessions.

🎲

The Guesser

Builds based on their own pain points. Validates after building. This is why most indie products die in silence.

📊

The Over-Researcher

Pays for Gartner reports, runs surveys. Good process but slow, expensive, retrospective. The moment passes.

None of them would say they're doing it wrong. Build Signals makes it obvious how much they're missing.

How it works

Step 01

AI monitors thousands of threads daily

Every Ask HN, Show HN, and trending discussion is scanned and indexed automatically.

Step 02

Filters for genuine commercial intent

Not just mentions — actual buying signals. People describing problems and saying they'd pay to solve them.

Step 03

Delivers opportunities you'd never find manually

Matched to relevant GitHub repos so you can start building immediately. Updated daily.

One signal. That's it.

That's all it takes to pay for itself. Here's the math:

5x

One thread → one customer conversation → one $500 deal

∞

One product idea → $5k/month recurring revenue

$147

Less than one domain name you'll never use

$147 vs. the alternative

Building the wrong thing for 3 months $15,000 — $50,000
Domain names for ideas you never validated $200+
SaaS subscriptions you forgot to cancel $600/year
Build Signals — lifetime access $147

Your next paying customer already described what they need. Last Tuesday.

Get lifetime access — $147
What exactly do I get? +
Lifetime access to the Build Signals dashboard. You see every flagged opportunity — the thread, the AI analysis, the matched GitHub repos, and whether anyone has offered a solution yet. Updated daily.
How often is it updated? +
Every day. The system scans Hacker News continuously, processes new threads overnight, and delivers fresh signals each morning.
What counts as a "signal"? +
A signal is a thread where someone explicitly describes a problem they'd pay to solve, asks if a tool exists for a specific use case, or expresses frustration with existing solutions in a way that implies demand for something better. We filter out vague complaints and focus on actionable commercial intent.
Is there a refund policy? +
Yes. If you don't find at least one signal worth investigating within 30 days, email us and we'll refund you in full. No questions asked.