The Eureka Database

The Eureka Database

A library of startup ideas, each one weighed against businesses already making money.

How to evaluate an idea

These are starting points, not verdicts. A ranked list can feel like pressure. The best idea for you is the one that survives your own honest read:

  • Conviction. Would you use this, or wish it existed? Belief is what carries you through the hard middle.
  • Capability. Can you realistically build and sell it with your skills, time, and resources? Lean on your unfair advantages.
  • Intention. Why this, why you, why now? The right idea fits the life and pace of business you actually want.
  • Proof, not promise. The evidence here is a head start, not a guarantee. Talk to a few real users before you commit.

Quick take

PassInteresting

Marketing & Sales

details

Cold email deliverability auditor for B2B founders

Founders blast cold email straight to spam without knowing why. A one-scan auditor that grades domain setup and rewrites the worst spam triggers.

passinteresting
1 / 2

2 open to read · 5 more in the full database

Read Cold email deliverability auditor for B2B founders
Marketing & Sales

Cold email deliverability auditor for B2B founders

Founders blast cold email straight to spam without knowing why. A one-scan auditor that grades domain setup and rewrites the worst spam triggers.

1–2 weeks3
Read Tenant document screening for small landlords
Real Estate

Tenant 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.

1–2 weeks5

The database continues past here.

5 more ideas, each with its sources, a build kit, and a working demo.

Read the full database