PromptProof
Test LLM prompts with confidence intervals. Compare models, collaborate as a team, validate extraction accuracy. The statistical approach to prompt engineering.
Estimated origin: Japan
Added April 12, 2026
· Last analysed April 12, 2026 · via 
· 62% unique tagline
StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 12 April 2026; the live site may have changed since.
PromptProof looks production-ready overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. Visible gaps: missing several security headers and no email security records.
Launched on Product Hunt on April 12, 2026. The site is hosted on Google Cloud, with a domain registered 10 months before launch. We've detected 5 technologies on this site, covering CSS frameworks, frameworks, hosting, and protocol. The stack includes React, Tailwind CSS, and Google Cloud.
It's one of 42 launches on this exact stack.
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Tech Stack (5)
| Hosting |
Google Cloud
(2)
|
| Protocol | HTTP/3 (2) |
| CSS framework |
Tailwind CSS
|
| Framework |
React
|
| UI library |
shadcn/ui
|
Infrastructure
Email Security
Readiness Breakdown How?
Vibe Score Breakdown How?
| Signal | Points |
|---|---|
| AI CSS signals | +10 |
| AI copy signals | +5 |
| AI palette signals | +5 |
This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.