DoubleCheck

Compare your artwork to the reference with ease

Design

www.doublecheck.art · Added June 25, 2026 · Last analysed June 25, 2026 · via · 83% unique tagline

Own this Launch?

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 25 June 2026; the live site may have changed since.

DoubleCheck still has work before launch. Worth fixing first: missing several security headers, incomplete legal pages, and no robots.txt or sitemap.

Launched on Product Hunt on June 25, 2026. The site is hosted on Amazon.com in the United States, with a domain registered 5 weeks before launch. The crawl picked up 2 technologies on this site, covering DNS providers and servers. The stack includes Apache and UDAG.

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

3.6

StackScope Score

Poor

84/100 Launch Readiness

Well prepared

0/6 Security Headers

Poor

2/3 Legal

Partial

0/2 Web Standards

Missing

71/100 Performance

Fast

Vibe Score 0 · No AI signals

Informational pattern-match signal. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (2)

Infrastructure

DNS	UDAG (2)
Server	Apache

Infrastructure

Network

AMAZON-02 - Amazon.com, Inc., US

AS16509 · US

DNS

UDAG

Authoritative nameserver

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 17 Jun 2026 to 15 Sep 2026

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

Domain Age

1 month

Registered May 2026 · united-domains GmbH

Email Security

✓

SPF ~all Soft-fail (~all). Common and accepted.

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, og:description

✓ Canonical URL declared

✓ Responsive viewport meta tag

✓ Favicon present

✓ Semantic HTML (nav, main, article)

- Twitter card meta tags

Performance How?

991 ms Server response

12% Faster than peers

448 ms Largest contentful paint

0.07 Cumulative layout shift

2.8 MB Page weight

2.7 MB Image weight

1 Third-party domains

0 Console errors

0 Failed requests

⚠ 4 images: 4 oversized, 1 missing alt text

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

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

? Terms of Service not detected

96% unique

Mentions:

GDPR Cookies Do Not Sell

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

1 JS files

1 CSS files

1 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.