Stop Building Things Nobody Wants.
Daily startup ideas. Each one a full 15-section brief — who's in pain, what they're paying for, who's failing them, and exactly what you'd build to win.
50 briefs live today. A new one added every day.
One-time $99. Lifetime access. We're moving to a monthly subscription soon — lock it in before we do.
See a real opportunity brief — in 60 seconds
“I spent 3 weeks validating an idea last year. This brief had more signal in 15 sections than everything I gathered on my own.”
— David Phillips, Founder
What you get
What's inside each brief
We scan Reddit, funding rounds, G2, and niche communities every day — so you don't have to
A new validated opportunity added every day. Each one: real user pain, real quotes, real WTP signals, and our honest GO/NO GO.
Every quote sourced. Every data point cited. Every URL verified.
Every brief ends with a verdict: BUILD or SKIP. We don't hedge.
The ChatGPT Test — if AI can solve it, it's not a business.
Pricing
One price. Lifetime access.
We just launched. Founding members get lifetime access for a one-time $99 — before we switch to a monthly subscription. Get in now and never pay again.
Lifetime access — before we switch to monthly
Access to the full brief library. A new brief every day. Search and filter by category, difficulty, TAM, and more.
Founding members lock in $99 lifetime. BuildSignal is moving to a monthly subscription soon. This is the only time you'll see this price — lock it in before we make the switch.
Secure checkout via Stripe. Instant access.
Why this exists
Built by Mohan. Six products. Five dead. One hit.
ProxiesAPI wasn't the best idea I had — it was the best researched one. Before I wrote a line of code, I spent weeks buried in Reddit threads, analyzing what developers were actually complaining about, cross-referencing who was paying for garbage alternatives, and mapping out where the incumbents had stopped caring.
By the time I started building, I already knew it would work. It's been profitable since month three. No VC. No cofounder. Still running.
The other five? I skipped the research. Built on vibes. You know how that ends.
BuildSignal is the exact process that found ProxiesAPI — the scouting, the validation, the GO/NO GO call — just done for you, every day.
Who this is for
Founders who've shipped before
and want their next scouted opportunity.
This is for you if
Not for
Lock in lifetime — before we switch to monthly.
BuildSignal is moving to a monthly subscription soon. Get lifetime access to the full brief library for a one-time $99 while you still can. A new brief added every day.
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