Idea Validation — Adversarial
Your idea looks stronger
after we break it.
Scrutinises
The mechanism
Most founders are told their idea is good.
Crucible tells you where it breaks.
You submit your idea — the problem you see, the customer you have in mind, how you plan to charge — and Crucible runs it through a structured adversarial analysis built on the patterns of how B2B startup ideas actually fail.
Not a viability score. Not a heatmap. A precise critique, section by section, with the specific reasoning behind each finding. The kind of scrutiny a rigorous investor or a sceptical operator would apply — before you have burned a year.
Submit your idea
Describe the problem, the customer, the pricing logic, and your intended go-to-market. No deck required — plain language works.
Crucible runs the analysis
The engine maps every assumption your idea contains — explicit and hidden — and stress-tests each one against market, pricing, and sales-cycle reality.
Read the Critique Report
A structured breakdown by category: Pricing Assumption, Willingness to Pay, Sales Cycle Realism, Domain Credibility. Each with a verdict and a precise explanation.
Push back in the Stress Test
Disagree with a finding? Make your case. Crucible will concede where your counter-argument holds — and push harder where it does not.
The three instruments
Every component built for one purpose: honest scrutiny.
Feature 01
The Critique Report
The core output. A structured breakdown of your idea across the categories that determine whether a B2B business actually gets off the ground: pricing logic, customer willingness to pay, sales cycle realism, and domain credibility.
Each section carries a verdict — HOLD, QUESTION, or FAIL — with two to three sentences of precise reasoning. Not a rating. Not a colour. A written finding you can argue with.
See a live report →At €89/mo your pricing sits 2.4× above median SME per-tool spend. Without a documented ROI anchor, you will encounter price resistance at first contact.
Survey data suggests the ICP is in the market — but for a €30-€45/mo tool. Closing the gap requires either a demonstrable 10× efficiency claim or a usage-based entry tier.
2-week close for a tool with finance-team approval is not grounded in B2B procurement reality. Model 8-16 weeks.
No stated prior experience in target vertical. Not disqualifying, but credibility signals will be required earlier in the sales process than you may expect.
Feature 02
The Assumption Map
Every idea rests on assumptions. Most founders know the obvious ones. Crucible surfaces the hidden ones — the load-bearing beliefs buried inside a business model that look like facts until someone applies pressure.
The Map classifies each assumption by whether it is load-bearing (the idea collapses without it), contributing (makes the model work better), or optional (nice to have). Risk is rated by how testable and unproven each assumption is.
Map your assumptions →Feature 03
The Stress Test
The Critique Report is not the final word. If you have evidence that contradicts a finding, make your case. Crucible re-evaluates under the new information.
When your counter-argument holds, Crucible concedes and revises the verdict. When it does not, the analysis goes deeper. This is where most founders discover whether their confidence is conviction or confirmation bias.
Start the stress test →Your €89/mo price point sits 2.4× above what our data suggests SMEs budget per single workflow tool. What evidence do you have that this segment will clear that threshold?
I have five letters of intent from SMEs who agreed to a €95/mo pilot. They specifically said the current manual process costs them roughly €400/mo in accountant time.
That changes the pricing finding. Five LOIs at above your ask — and with a documented cost baseline — is meaningful signal. Revised verdict on Pricing Assumption: QUESTION. The next test is whether those pilots convert to paid after the grace period ends.
Two of five already converted. Three are in month two of the pilot.
Noted. Pricing now moves to HOLD. The remaining critical risk is sales cycle — your 2-week close assumption remains unvalidated. Who is the actual decision-maker in each of your five accounts?
The honest comparison
Other tools want to encourage you. Crucible does something more useful.
Validation tools built to make you feel good produce a metric that correlates with the founder's confidence level, not market reality. Crucible is built for founders who want to know what is actually wrong — while there is still time to fix it.
| Capability | Viability score tools | Crucible |
|---|---|---|
| Output format | A single score (e.g. 87% viable) | Written verdict by category — specific, arguable |
| Assumption mapping | Not offered | Full assumption tree, load-bearing vs. optional |
| Pricing analysis | Generic market-size framing | Willingness-to-pay analysis against sector data |
| Sales cycle check | Not offered | Close-time realism by ICP and deal type |
| Founder pushback | Results are final | Stress Test: argue the findings, revise verdicts |
| Feel-good bias | High — tool rewards optimistic inputs | None — the analysis does not bend to enthusiasm |
| Emotional outcome | Encouraged | Informed |
"The most useful thing a tool can do for an early founder is tell them the specific thing that is likely to kill their idea."
Crucible design principle
Pricing
Simple pricing.
No viability score included.
Every plan includes the Critique Report, Assumption Map, and Stress Test. The difference is volume. Billed monthly. No annual lock-in on the Founder plan.
Founder
For solo founders pre-commitment.
- 3 Critique Reports per month
- Full Assumption Map per report
- Stress Test — up to 20 exchanges per report
- Report history: 90 days
- Export to PDF
- Email support
Free 14-day trial. No credit card required to start.
Team
For co-founders and small founding teams.
- Unlimited Critique Reports
- Full Assumption Map — all reports
- Stress Test — unlimited exchanges
- Up to 5 seats
- Shared report workspace
- Report history: unlimited
- Export to PDF and Markdown
- Priority email support
Free 14-day trial. No credit card required to start.
Crucible does not offer a "free forever" plan. A critique that costs nothing signals that the stakes are low. We build for founders who take the exercise seriously.
The question worth asking
If your idea can survive Crucible,
it can probably survive the market.
Submit your first idea and get a full Critique Report in minutes. The trial is 14 days. No credit card until you decide it is useful.
14-day free trial. No credit card required. Founder plan at €29/mo after trial.