Documentation
Everything you need to know about using FirstUsers.
Getting Started
Create your account
Sign up with your email using our magic link — no password required.
Submit your idea
Write one paragraph describing what you want to build and who it helps.
Get your report
In under 2 minutes, receive a full validation report with 18 scored signals.
Understanding Your Report
Demand Score
Measures how strongly simulated personas respond to your idea. Higher is better.
Persona Simulation
2,000+ diverse early-user personas each react independently to your concept.
Verdict
Build, Pivot, or Kill — a clear recommendation backed by data, not opinion.
Data & Privacy
Idea privacy
Your ideas are never shared, sold, or used for model training.
Data deletion
Request full deletion of your data at any time by emailing support.
Security
All data is encrypted in transit and at rest using industry-standard protocols.