Preuve AI vs Arena
Plans, free access, limits and intended use side by side, taken from each vendor’s own pages. No score and no winner: the facts show where the two differ.
Change tools
Cited 0-100 viability score for a startup idea, with a free first check and one-time pricing
Free by the terms today, with no published price list
- Free access
- Preuve AI: Free access
- Arena: Free access
- Paid from
- Preuve AI: USD 59 one-time
- Arena: No fixed price listed
- Plans listed
- Preuve AI: 7
- Arena: 1
- Public API
- Preuve AI: Not confirmed
- Arena: Not confirmed
Where Preuve AI and Arena differ
- Pricing checkPrices confirmed for Preuve AI; prices not confirmed for Arena.
- PlansPreuve AI lists 7 plans and Arena lists 1.
Head to head
Each value from the tool’s profile and the vendor’s own pages
| Preuve AI | Fact | Arena |
|---|---|---|
| Access and price | ||
| Free access availableReality Check | Free accessSame | Free access available |
| USD 59 one-timeFounder Report | Lowest listed paid plan | No fixed price listed |
| Free Reality Check (2 scans); Founder Report $59 one-time; Lifetime Pro $499 | Pricing model | Free per Terms of Use; no price list |
| 7 | Plans listedDiffers | 1 |
| Not confirmed | Public API | Not confirmed |
| Not confirmed | Card to start | Not confirmed |
| Not confirmed | Open source | Not confirmed |
| What it is for | ||
| Checking whether a startup idea has demand and room before building it | Built for | Comparing AI model answers by voting, without a paid plan |
| Research & sources | CategorySame | Research & sources |
| Platforms |
|
| Works with |
|
| How current | ||
| Profile sources checked | ||
| Prices confirmed · Oct 21, 2026 | Pricing checkDiffers | Prices not confirmed · Sep 30, 2026 |
Official source check for both tools. No hands-on testing and no score: “Differs” marks a documented difference, not a better tool.
Plans and prices
Preuve AI
Prices confirmed · Oct 21, 2026- Reality CheckFree
- Founder ReportUSD 59 one-time
- 2-Report PackUSD 89 one-time
- 5-Report PackUSD 199 one-time
- Investor-Ready PackageUSD 499 one-time
Show 2 more plans
- Lifetime ProUSD 499 one-time
- Lifetime BusinessUSD 999 one-time
Arena
Prices not confirmed · Sep 30, 2026- Free access (per Terms of Use)Free of charge per the terms; no public price list
Strengths and limits
Preuve AI
Strengths
- One-time pricing: Founder products are single payments with no subscription, and Sentinel does not renew or charge after three months.
- Claims link to sources: The vendor says sourced claims link back to their source and estimates are labelled as estimates.
- Free first check: The Reality Check gives a score, market size and two competitor previews for 2 scans with no payment.
Limits to plan around
- Score method is closed: Factor weights, thresholds and agent prompts are unpublished, and the vendor says the score is a snapshot, not a guarantee.
- Narrow free tier: The free check is limited to 2 scans, each viewable for 7 days, with 2 competitor previews and no pivots.
- Narrow refund: The 14-day guarantee is a rerun first, once per customer, and not after Build with AI or an export; Lifetime plans and the Investor Package are excluded.
Arena
Strengths
- Free access per the terms: The terms state the service is currently free of charge and the credit help page describes a daily free balance.
- Method documented in public: The FAQ and help pages explain the voting model, anonymity and which modes affect rankings.
- Leaderboards need no login: Rankings and filters can be browsed without an account.
Limits to plan around
- No published price or credit size: The pricing URL shows a not-found page and the daily credit amount is not stated.
- Prompts are shared beyond Arena: Inputs go to third-party model providers, and conversations can feed de-identified public datasets.
- Terms allow future charges: The terms reserve the right to charge for the service or any feature.
See both products
Start from your task, not from a winner.
Run both tools on the same real task, then compare the result, how much editing it needs and how fast it uses your plan’s allowance.
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Comparing tools from different categories is fine, and often useful — a writing assistant and a research tool solve different halves of the same job. The table will show you exactly where they diverge.
Questions about comparing tools
How does the comparison work?
Add two tools to the comparison tray from any tool card, then open this page. The table pulls each tool's verified plan details, platforms, strengths and limits from its profile, so both columns carry the same kind of evidence, with a separate source-check date for each tool.
Do you declare a winner?
No. The table sets two tools against each other on documented facts, not on a score. Which one wins depends on your task, your budget and your usage volume — three things we cannot see from here.
Why are some cells empty or marked unverified?
Because we could not confirm that detail on the vendor's own pages. Rather than filling the gap with a figure from elsewhere, we mark it and say why on the tool's profile.
Can I compare more than two tools?
Not at once. Two columns keep the differences readable and force a real decision. Remove either selected tool to replace it, or clear both to start a new pair.
Every figure in the table above comes from the linked profile, where the source and the verification date are listed. Browse all tools or read the editorial policy.