Know you want to build.
Not sure what yet.
The Eureka Database turns real market signals into validated startup ideas — each with its sources, comparable proof, a build kit, and a working demo.
Built for
Five ideas open in full — live demos included. No account needed.
The database itself. Every idea sourced, weighed, and open to explore.
The hardest part isn’t building. It’s knowing what’s worth building in the first place.
“I want to build something, but I don't know what's actually worth building.”
“I don't want to waste six months on an idea nobody needs.”
“I don't have a network of VCs or users to validate with.”
“I need real signals, not another list of generic startup ideas.”
The Eureka Database is the starting point for exactly this.
Where the signals come from
Not just complaints. Every kind of market signal.
The Eureka Database reads across the places real demand shows up — communities, search trends, reviews, job posts, regulatory shifts, founder interviews, and the businesses already earning.
What one idea looks like inside
Session Replay for Native iOS Apps
Session replay SDK for native iOS apps: see exactly what users do in SwiftUI and UIKit, like Hotjar for mobile.
- Business model
- B2B SaaS subscription
- Industry
- Developer tools / mobile observability
- Difficulty
- 1–2 months
- Est. startup cost
- $200–$400
- Time to MVP
- 6–12 weeks
Problem evidence
Developers are actively searching for session-replay tooling built specifically for SwiftUI apps.1high confidence
Ask HN: Need a tool for session replay videos for SwiftUI · Hacker NewsOpportunity gap
No tool offers accurate, SwiftUI-native session replay at developer-friendly pricing. Smartlook and UXCam were built for UIKit and web.
Revenue, base case
~$430K ARR · 120 customers × $299/moEstimate from stated assumptions, not a forecast.
Also inside: buyer breakdown, competitor table, pricing model, GTM plan, roadmap, risks, a 7-day validation plan, and every source.
Read the full ideaHow we keep it real
Every idea is vetted by a human before it ships.
Most idea lists are AI-generated slop. Ours are mined from real demand, filtered hard, and then read one by one by our team. If it is not real, it does not make the database.
Scan
We read where real demand shows up: Reddit threads, popular tip and workaround posts, reviews, job boards, and regulatory shifts.
Sort
Targeted queries surface recurring, high-intent demand and the workarounds people already share by hand, not one-off venting.
Filter
Automated scoring strips out rants, duplicates, saturated categories, and thin AI-slop before a human ever sees it.
Reviewed by our team
Every idea that survives is read and vetted by hand before it enters the database. If it looks like slop, it never ships.
How it works
How a signal becomes a startup.
Follow one open idea end to end — from the signal it came from, through proof, to a demo you can click.
Following Tenant document screening for small landlords
- 01Source signal
It starts with a real signal — a Reddit thread, an HN post, a Google Trend, a YC request, a review, a job post.
Reddita real signal, capturedHow do you verify pay stubs aren't fake?
“Third applicant this month with a pay stub that doesn't match the bank statement. The big screening tools want a property-manager contract. I just have four units.”
View the source - 02Pattern, not a one-off
The same need surfaces again and again across communities. That recurring pattern is the opportunity.
Recurring demandThe same gap shows up across communities — not a fluke, a pattern.
One post is noise. The same need, again and again — across forums, reviews, and threads — is the part worth building on (here, in real estate).
- 03Validated startup idea
We turn the pattern into a sharp, buildable idea — scoped, named, and ready to act on.
Real EstateTenant document screening for small landlords
Small landlords screen applicants by hand, squinting at pay stubs and bank PDFs for fraud. A focused tool that verifies income docs and flags forgeries in minutes.
- 04Comparable proof
Then we find businesses already earning on the same problem, so demand isn't a guess.
TurboTenantComparable8-figure revenue (reported)
Already earning on the same problem — the demand isn't hypothetical.
See the comparable - 05A build kit
Every idea ships an execution kit — the stack, the scope, and the first moves to make.
The execution kit for Tenant document screening for small landlords lays out the stack, the scope, and the first moves — so day one is building, not guessing.
Open the build kit - 06A working demo
And many come with a live, demo-ready concept you can open and click through right now.
Many ideas ship with a live, demo-ready concept you can open and click through.
See it live
Ideas you can click through today.
Five ideas are open in full, several with a working demo. Open one and explore the real thing — no account needed.
+6 more validated ideas, each with its sources, comparables, and a full execution kit.
One decision. Everything you need to start.
We're in early access. The price goes up when we leave it.
Lifetime access
Every idea. Every kit. Every investor. Forever.
Going to $89 soon
Every idea, every build kit, the investor database, and Claude Code. One payment, yours forever.
- Every validated idea, in full
- Every execution kit (prompts, services, build steps)
- The full investor database (emails, stage, location)
- Revenue validation and comparable businesses
- Claude Code access via the Eureka DB MCP
- New opportunity drops as we add them
No subscription. No recurring charges. One payment.
Questions builders ask before they commit
The idea is the easy part. Knowing it's worth building is the hard part.
Eureka DB does the validation work most founders skip: evidence the problem is real, proof that people pay for it, and a clear plan to build. Two ideas are open to read in full, no account needed.