Watch the crowd decide.
Ask up to 100,000 AI-simulated participants.
See who’s interested. And why.
Test a startup idea, app, service, product or ad on a crowd of AI-simulated participants. Get a detailed report with clear conclusions before you spend.
Test your idea free on 1,000 AI‑simulated people.
Describe a startup idea, app, service, product or ad. See possible reactions, objections and what to check next. The participants are AI-simulated, not real people, and results aren’t a sales forecast. Participants are AI-simulated, not real people.
ParcelNest Smart Delivery Box · $119
A made-up example, not real results. Your own test gets its own report.
- Most interested audience
- Main objection
- Price worth testing
- $39
- Suggested next test
More from this sample
Who’s buying
What they love
Why they don’t buy
AI-simulated participants said · tap any dot for more
Ideas to test next
Simulated reactions from AI personas, not real people or a forecast of sign-ups, sales or success. Use it as a fast first check, then confirm with real people. How it works
What the free 1,000‑participant test shows
A first look at how an AI-simulated audience might react to your idea, so you know what to check with real people before you spend.
A clear verdict
Promising, mixed or weak, with a short explanation and the next step to check.
The main objections
The top reasons people might say no, plus a rewritten pitch that answers them.
Who’s most interested
8 audience groups compared, and 12 short simulated interviews in the participants’ own words.
What to check next
A price to test next, feedback on 1 image if you add one, and suggested validation steps with real people. Everything comes as a PDF.
See full sample reports: startup idea · app · service · physical product · ad. Read how the participants are generated and counted.
Guides by kind of idea: Startup ideas · Apps and software · Services · Physical products · Ads · AI focus groups
Free test questions
Is the test really free?
Yes. Your first 1,000-participant test is free if eligible: one per person, no card needed. After that, tests start at $19, and you see the price before you pay.
Are the participants real people?
No. Each participant is an AI persona with an age, a job, a budget and habits. Their answers are simulated reactions, not real customer data, and not a forecast of sign-ups or sales. Use the results to decide what to check with real people.
What can I test?
A startup or business idea, an app or software, a service, a physical product, or an ad or marketing message. You don’t need a finished product, a website or a price.
Why not just ask ChatGPT?
You can, and a chat is great for brainstorming. SellTo.us runs a structured test instead: our code builds a fixed crowd of individual participant profiles for your audience, every one of them answers buy, maybe or no for each version, and the report counts those answers. Every version and image is shown to the same simulated people, so comparisons are like for like. You get results by audience group, objections with keyword counts, a rewritten pitch, a re-test of your improved version on the very same simulated people (same test size), numbers checked by code, and a PDF you can share. It is still AI imagining how people might react, not real customers, so use it as a fast first check.
How long does it take?
A 1,000-participant test usually takes about 10 to 12 minutes. You can leave the page while it runs, and the report is emailed to you when it’s ready.
Is my idea kept private?
Yes. Your tests are private to your account. We don’t share or publish what you describe or upload.
What if I want a bigger test?
Bigger tests use 10,000 or 100,000 AI-simulated participants, compare up to 3 or 5 versions of your idea side by side, and add more audience groups. See pricing.