Which of these AI idea validation tools is cheapest?

Tribunal of Ideas starts at US$ 4.90 per one-off trial. DimeADozen starts at US$ 9. IdeaProof starts at €19.99. Preuve starts around US$ 29. ValidatorAI has a free tier and a paid plan, but the paid plan's price isn't disclosed on its site.

Which one validates an idea the fastest?

ValidatorAI, DimeADozen, IdeaProof, and Preuve return a score in 60 to 120 seconds. Tribunal of Ideas takes longer because it runs a full trial: up to 25 seats, each a different AI model, deliberating, and more than 40 AI calls. The extra time is a consequence of that depth, not a choice to be slow.

Is Tribunal of Ideas free?

The admissibility ruling is free: it reads your idea and flags where the pitch is weak, at no cost. Running the full trial on your own idea is always paid, starting at US$ 4.90. That's not different from the competition: all of them keep the full analysis behind some kind of paywall, whether a subscription, a one-off purchase, or sign-up.

Which of these idea validators is most trustworthy?

There's a structural difference between them. ValidatorAI uses 1 model; DimeADozen uses 1 model plus real-source data; IdeaProof uses 4 invisible models; Preuve uses 10 invisible agents. In all four, a final number comes out decided on its own. Tribunal uses 25 seats, each one a different AI model, with a jury of 12 different models voting in the open, and a verdict calculated by formula, not written by a model.

Why does the same idea get different scores on each tool?

We tested the same idea (Intelibot, a WhatsApp customer service SaaS for clinics) on all four tools on 07/15/2026: the score ranged from 69 to 98, a 29-point spread. The same idea got a near-perfect 98 on one tool and a 69 on another. Each one weighs things differently, and none shows the reasoning behind the number. That's exactly the fragility a single verdict, decided by one model, tries to hide.

Category comparison

The best AI idea validation tools, compared

We gathered today's best AI idea validation tools (ValidatorAI, DimeADozen, IdeaProof, and Preuve) and compared them with Tribunal of Ideas: how each one decides its verdict, what you can see without paying, and what it costs. On Tribunal, your idea goes on trial in front of 25 seats, each one a different AI model, with a jury of 12 different models voting in the open.

Put my idea on trial

The category

How each AI idea validation tool decides its score (and what it shows for free)

There are several AI idea validation tools on the market today: ValidatorAI, DimeADozen, IdeaProof, Preuve, and others. The pitch is similar across all of them: describe your idea, get a number back. The difference is in what backs that number, and in what each one lets you see without paying.

On 07/15/2026 we tested the same idea, with the same input text, across the four tools chosen for this comparison. The scores ranged from 69 to 98 for the same idea, most of them on the optimistic side. None of them shows the reasoning behind the number, only the final result.

What stays visible without paying also varies a lot: a standalone score, a teaser, a blurred data point behind a paywall, or even a generous analysis that ends in an affiliate funnel. That's the landscape this comparison lays out, row by row, with verifiable data.

Same idea, five scores

Same idea, five different scores

Idea tested on 07/15/2026: Intelibot, a WhatsApp customer service SaaS for clinics

98/100

DimeADozen

85/100

ValidatorAI

81/100

IdeaProof

69/100

Preuve

67/100

Tribunal of Ideas

Same input text, actually run through all five. Scores ranged from 67 to 98, a 31-point spread for the same idea. The most generous was DimeADozen, at 98 out of 100, which then locks the entire report behind a paywall. The lowest was ours: 67, Innocent with concerns, because the Tribunal flagged thin differentiation, unproven execution, and an unaddressed compliance risk. When the same idea is worth 98 in one place and 67 in another, the number alone tells you little. The difference is that with ours, you can follow the debate that led to the score.

Side by side

Tribunal of Ideas vs. ValidatorAI, DimeADozen, IdeaProof, and Preuve

	Tribunal of Ideas	ValidatorAI	DimeADozen	IdeaProof	Preuve
How the verdict is decided	A jury of 12 different models, in a 25-seat trial, deliberates; the final verdict is calculated by formula, not written by a model	A single AI model reads the idea's text and responds	A single AI model, backed by real-source data	4 AI models, but invisible: only the final result shows	10 AI agents, but invisible: only the final result shows
Transparency of the result	Shows everything, with linked sources; nothing is blurred	Delivers the full analysis, but pushes you into an affiliate funnel	Free tier shows only the score; the full report is paid	Delivers the report, but hides the sources and full reasoning behind the paywall	Unlocks 4 real tabs; on the paid ones, the preview is generic sample content, not your analysis
Experience	Live trial, with a free appeal	Text report, with an AI mentor and support tools	Extensive report, from business overview to validation, almost all paid	Dashboard with 6 tabs: summary, scores, market, financials, roadmap, and journey	Dashboard with tabs and named frameworks
Evidence with sources	Pain points and competitors with linked sources, surfaced by a real market search	Own index of 300k+ founders; no search for your specific idea	Real-source data (paid tier: 800+ citations)	50+ sources (Reddit, X, HackerNews, YC)	50+ sources (Product Hunt, Google Trends, GitHub, HN)
Speed	A deeper experience: the trial takes longer	Score in 60 to 120 seconds	Score in 60 to 120 seconds	Score in 60 to 120 seconds	Score in 60 to 120 seconds
What you can see without paying	A free admissibility ruling that flags where the pitch is weak, plus a showcase of full trials	Free 6-section analysis, but no follow-through: ends in an affiliate funnel	The viability score and the executive summary; all other sections are paid	Free signup unlocks a full report (GO/NO-GO verdict, score, market) with 90 free credits	4 real tabs (overview, validation, competitors, market); the rest are paid
Language	Native PT-BR, also in English	English	English	18+ languages	French, Portuguese, and other languages (global)
Price	US$ 4.90	Free tier + paid plan(price not disclosed)	From US$ 9	From €19.99	From ~US$ 29

Prices checked on 07/15/2026. Check each tool's site for current pricing.

Where they win

What the other idea validation tools do better

Speed is a clear win for the other four: ValidatorAI, DimeADozen, IdeaProof, and Preuve return a number in 60 to 120 seconds. Tribunal of Ideas takes longer, but not by choice: it is a consequence of running a full trial, with up to 25 seats deliberating and more than 40 AI calls, instead of an instant score.

"Free" isn't an exclusive win for anyone either. Each tool shows a different slice without charging: ValidatorAI gives a generous 6-section analysis (with a built-in affiliate funnel), DimeADozen shows only the score, IdeaProof unlocks a full report after a free sign-up, and Preuve unlocks 4 real tabs and shows only the structure of the paid ones, with a sample preview. Tribunal of Ideas's free admissibility ruling follows the same principle: a real sample, not the whole product. Across all five, running a full validation on your own idea is paid.

FAQ

Which of these AI idea validation tools is cheapest?: Tribunal of Ideas starts at US$ 4.90 per one-off trial. DimeADozen starts at US$ 9. IdeaProof starts at €19.99. Preuve starts around US$ 29. ValidatorAI has a free tier and a paid plan, but the paid plan's price isn't disclosed on its site.
Which one validates an idea the fastest?: ValidatorAI, DimeADozen, IdeaProof, and Preuve return a score in 60 to 120 seconds. Tribunal of Ideas takes longer because it runs a full trial: up to 25 seats, each a different AI model, deliberating, and more than 40 AI calls. The extra time is a consequence of that depth, not a choice to be slow.
Is Tribunal of Ideas free?: The admissibility ruling is free: it reads your idea and flags where the pitch is weak, at no cost. Running the full trial on your own idea is always paid, starting at US$ 4.90. That's not different from the competition: all of them keep the full analysis behind some kind of paywall, whether a subscription, a one-off purchase, or sign-up.
Which of these idea validators is most trustworthy?: There's a structural difference between them. ValidatorAI uses 1 model; DimeADozen uses 1 model plus real-source data; IdeaProof uses 4 invisible models; Preuve uses 10 invisible agents. In all four, a final number comes out decided on its own. Tribunal uses 25 seats, each one a different AI model, with a jury of 12 different models voting in the open, and a verdict calculated by formula, not written by a model.
Why does the same idea get different scores on each tool?: We tested the same idea (Intelibot, a WhatsApp customer service SaaS for clinics) on all four tools on 07/15/2026: the score ranged from 69 to 98, a 29-point spread. The same idea got a near-perfect 98 on one tool and a 69 on another. Each one weighs things differently, and none shows the reasoning behind the number. That's exactly the fragility a single verdict, decided by one model, tries to hide.

Ready for a calculated verdict, not a single score?

Instead of one model (or several, but invisible) deciding behind a number, your idea goes on trial in front of 25 seats, each one a different AI model, with a jury of 12 different models voting in the open.

Put my idea on trial