Validate before you build

Don't have an idea? We'll find one.
Have one? We'll stress-test it.

AI-simulated customer reactions in minutes, not months. Walk away with customer archetypes you can chat with, objections grounded in real public quotes with linked sources, and a confidence score you can show your co-founder.

Find me an idea Validate my idea

200 free credits on signup. No card required.

Sample validation reportReady

Confidence score

74/ 100Promising

Top objection

"Pricing feels steep until I see the team workflow benefits."

Likely first buyer

Solo founder, 1–3 product launches behind them, currently using a spreadsheet to track decisions.

Reverse Mode

No idea yet? Tell us about you.

Most validation tools assume you already have an idea. We don't. Describe your skills, budget, interests, and what you'd refuse to build. We generate five candidate businesses, micro-validate each one, and rank them by likelihood of working.

Pick the winner. Promote it to a full validation. Start with conviction.

Try Reverse Mode →

Candidate ideas for "Backend engineer, $5k budget, B2B SaaS, no hardware"

Async stand-up tool for distributed eng teams

Strong

Compliance checklist generator for early SaaS

Promising

Internal API documentation auto-updater

Worth testing

Slack-native incident retro tool

Mixed signal

AI changelog writer for B2B products

Crowded

Two things nobody else does

Chat with your customers. See the receipts.

Most validation tools hand you a score and disappear. We let you keep asking questions — and back every objection with public quotes you can click through to.

Talk to your future customersLive

After the sim, every persona stays on the line. Ask them why they pushed back, what would change their mind, who they'd recommend it to. They answer in-character, using the profile and the things they actually said during the run.

You

What would actually get you to try this?

Maya · Solo founder, 2 prior launches

Honestly? A 10-minute demo against my actual spreadsheet. If I can see it replace what I'm doing on Sunday nights, I'll pay.

Export the full transcript. Use the answers in your pitch, your landing copy, your next call with a real customer.

Grounded in real customer voicesReal evidence

Every top objection is matched back to actual public posts and to curated business literature — Paul Graham, First Round Review, Failory, CB Insights, YC. Real excerpts, real authors, real links you can click.

“Pricing feels steep until I see the team workflow benefits.”

Real voices · r/SaaS

“I bounced off the price page twice before I clicked the team plan and realized what I was actually buying.”

View source thread ↗

Strategic literature · First Round Review (2022)

“Buyers don't compare your price to your competitor — they compare it to the cost of doing nothing.”

Anonymized excerpts. Attribution preserved. Judge the relevance yourself — we don't infer verdicts from quotes.

What you actually get

A report you can read in 5 minutes, share with a co-founder, and paste into a pitch deck.

Confidence score

A single number, 0–100, with the reasoning behind it. Designed to be defensible in conversation, not just a vanity metric.

Live persona interviews

Chat with any customer archetype after the run. They reply in-character using their profile and what they actually said. Export the transcript.

Bring your own personas

Build a custom persona library — describe them, or upload a doc that defines them. Drop your real CTO, your actual buyer, your toughest skeptic into any simulation.

Real quotes, linked sources

Top objections matched to actual public posts. Anonymized excerpts, real thread URLs, real communities. Click through and verify yourself.

Strategic literature citations

Each objection paired with a curated quote from Paul Graham, First Round Review, Failory, CB Insights, or YC — with author, year, and source link.

Top objections, clustered

The three or four things real customers will push back on, phrased the way they'd actually say it.

Early adopter archetype

Who's most likely to buy first, what they care about, and where you can find them.

Persona autopsy timeline

For every persona that changed their mind, see the moment it happened and what flipped them. The receipts behind the confidence score.

What-if scenarios

Tweak the price, the audience, the pitch. Re-run and see the delta side-by-side. Iterate on the report before you iterate on the product.

Sentiment trajectory

How opinion shifts as customers learn more. Tells you if word-of-mouth is going to help or hurt.

Failure risks, ranked

The top reasons this could fail, ranked. So you can stop them before you spend a month building.

Pitch-deck export

One-page visual you can drop straight into a deck. Investors see real validation, not just optimism.

How it works

Three steps. No interviews, no surveys, no waiting.

Tell us about you or your idea

Either describe the business you want to validate, or describe yourself and let Reverse Mode generate candidates.

We simulate your future customers

AI customer archetypes talk, push back, and form opinions. The messy social dynamics of a launch day, compressed into minutes.

Get a clear go/no-go report

Confidence score, objections, archetypes, failure risks. Share it, export it, or iterate on it with what-if scenarios.

Pay for what you use

No subscriptions. Buy credits, use whenever. 200 free on signup. Credits never expire.

Starter

$91,000 credits

Test the waters with a few full validations.

~10 micro sims
All features included
Never expire
$0.009 / credit

Get 1,000 credits

Stop guessing whether anyone wants it.

Spend twenty minutes today, save yourself three months of building the wrong thing.