Stamptcha

A privacy-first CAPTCHA that replaces image puzzles with a 4-second wax-seal ritual. No cookies, no Google tracking. Open source, self-hostable.

Added July 22, 2026 · Last analysed July 22, 2026 · via · 73% unique tagline

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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 22 July 2026; the live site may have changed since.

Stamptcha still has work before launch. What needs work: missing several security headers, incomplete legal pages, and no robots.txt or sitemap.

Launched on Product Hunt on July 22, 2026. The site is hosted on Contabo GmbH in Germany, with a domain registered 6 months before launch. The crawl picked up 7 technologies on this site, covering captcha, CSS frameworks, web fonts, and javascript library. The stack includes Tailwind CSS, cdnjs, and Google Fonts.

For context, it's running the same core stack as 6,176 other launches.

If you own this site, refresh the snapshot and see the full fix list any time →

2.6

StackScope Score

Poor

90/100 Launch Readiness

Launch ready

0/6 Security Headers

Poor

0/3 Legal

Missing

0/2 Crawl files

Missing

90/100 Performance

Fast

Vibe Score 60 · Many AI signals

How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (7)

Infrastructure

Protocol	HTTP/3
Server	Gunicorn

Build & Framework

Captcha	Stamptcha
CSS framework	Tailwind CSS
Font	Google Fonts
JavaScript library	Tone.js medium
Package CDN	cdnjs

Infrastructure

Network

CONTABO - Contabo GmbH, DE

AS51167 · DE

DNSSEC

Not enabled

DNS responses unsigned. Cache-poisoning vulnerable.

Green hosting

Not green hosted

No green-energy record. Data from The Green Web Foundation.

SSL Certificate

Let's Encrypt

Valid 23 Jun 2026 to 21 Sep 2026

Certificate as captured in this snapshot, not a live check.

Domain Age

6 months

Registered Jan 2026 · Spaceship, Inc.

Email Security

✗

SPF Not published. Your domain can be spoofed in phishing emails.

DKIM Not detected at common selectors. Your provider may use a custom one.

✗

DMARC Not published. Receivers fall back to permissive defaults.

MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.

TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (0)

This site uses no client-side storage we could detect on page load.

Readiness Breakdown How?

✓ Custom title and meta description

⚠

Open Graph tags (title, image, description) (partial) missing og:image

✓ Twitter card meta tags

✓ Canonical URL declared

✓ Responsive viewport meta tag

✓ Favicon present

✓ Semantic HTML (nav, main, article)

⚠

Meta description is 177 characters (advisory) Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear.

Performance How?

365 ms Server response

48% Faster than peers

628 ms Largest contentful paint

0.01 Cumulative layout shift

1.7 MB Page weight

4 Third-party domains

0 Console errors

0 Failed requests

⚠ 2 images: 2 without width/height

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

Vibe Score Breakdown How?

Signal	Points
Placeholder branding	+10
AI palette signals	+5
AI writing signals	+5
AI code-structure signals	+5
AI CSS signals	+15

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.

AI Stance

No AI stance declared

✗ llms.txt published

✓ No AI bots blocked in robots.txt

Content-Signal

? No directive declared

Link headers

? None advertised

Well-Known Files

✗ robots.txt

✗ sitemap.xml

✗ security.txt

✗ llms.txt

✗ ads.txt

✗ humans.txt

Legal

? Privacy Policy not detected

? Terms of Service not detected

Detection works best on English language sites.

Security Headers (0/6)

✗

Referrer-Policy

✗

X-Frame-Options

✗

Permissions-Policy experimental (check browser support)

✗

X-Content-Type-Options

✗

Content-Security-Policy

✗

Strict-Transport-Security

–

X-XSS-Protection deprecated (use Content-Security-Policy)

Build

2 JS files

1 CSS files

4 Third-party domains

Brand Colours

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.