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Certobserver

Search Certificate Transparency logs for unexpired TLS certificates. Free, fast, and no sign-up required.

Developer Tools
Sweden Estimated origin: Sweden

Added June 29, 2026 · Last analysed June 29, 2026 · via Hacker News · 67% unique tagline

Own this Launch?
Screenshot of Certobserver

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

Certobserver ships with the launch fundamentals in place, with complete legal pages, a thorough launch checklist, and well-configured email security. Worth fixing first: missing Referrer-Policy and Permissions-Policy.

Launched on Hacker News on June 29, 2026. The site is hosted on Hetzner Online GmbH in Germany, with a domain registered in 2025. We've detected 4 technologies on this site, covering business email, DNS providers, and security. The stack includes Bunny CDN DNS, Fastmail, and HSTS.

It's tighter on security headers than most Hacker News launches.

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

8.9
StackScope Score
Excellent
94/100 Launch Readiness
Launch ready
4/6 Security Headers
Decent
3/3 Legal
Complete
2/2 Crawl files
Complete
100/100 Performance
Fast
Vibe Score 0 · No 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 (4)

Infrastructure
DNS Bunny CDN DNS
Security HSTS
Email
Business email Fastmail
Proton Mail (3)

Infrastructure

Network
HETZNER-AS - Hetzner Online GmbH, DE
AS24940 · DE
DNS
Bunny CDN DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 1 Jun 2026 to 30 Aug 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
1 year
Registered Jun 2025 · Ascio Technologies, Inc. Danmark - Filial af Ascio technologies, Inc. USA

Email Security

⚠
SPF ?all Neutral (?all). Monitoring only, no enforcement.
✓
DKIM Detected via known email provider
✓
DMARC p=reject Reject (strict). Strong.
?
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)
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)
- Twitter card meta tags

Performance How?

396 ms Server response
46% Faster than peers
240 ms Largest contentful paint
0.00 Cumulative layout shift
112 KB Page weight
3 KB Image weight
1 Third-party domains
0 Console errors
0 Failed requests

⚠ 2 images: 2 oversized, 1 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.

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 (12 URLs)
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

✓ Privacy Policy
/privacy
✓ Terms of Service
/terms
92% unique
Mentions:
GDPR Cookies Data Controller DPO Do Not Sell Updated: April 29, 2026

Security Headers (4/6)

✗
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
3 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.