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Cobalt

A launcher, a signed App Store, a Rust SDK, and a capability-isolated runtime for supported Kobo e-readers. Install once over USB; everything after that arrives over Wi-Fi.

Developer Tools

Added August 27, 2026 · Last analysed August 27, 2026 · via

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Screenshot of Cobalt

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 27 August 2026; the live site may have changed since.

Cobalt is missing several launch fundamentals. Worth fixing first: missing several security headers, incomplete legal pages, and no robots.txt or sitemap.

Launched on Product Hunt on August 27, 2026. The site is hosted on GitHub Pages and served through Fastly. Our crawler found 3 technologies on this site, covering CDN, hosting, and security. The stack includes Fastly, GitHub Pages, and HSTS.

It's also running the same core stack as 2,514 other launches.

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

3.3
StackScope Score
Poor
100/100 Launch Readiness
Launch ready
1/6 Security Headers
Poor
0/3 Legal
Missing
0/2 Crawl files
Missing
70/100 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 (3)

Infrastructure
CDN Fastly
Hosting GitHub Pages
Security HSTS

Infrastructure

Network
FASTLY - Fastly, Inc., US
AS54113 · US
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 2 Aug 2026 to 31 Oct 2026
Certificate as captured in this snapshot, not a live check.

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)
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)
⚠
Meta description is 194 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?

257 ms Server response
54% Faster than peers
636 ms Largest contentful paint
0.00 Cumulative layout shift
7.3 MB Page weight
7.3 MB Image weight
1 Third-party domains
0 Console errors
0 Failed requests

⚠ 27 images: 23 oversized

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 not detected
? Terms of Service not detected
Detection works best on English language sites.

Security Headers (1/6)

✗
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

0 JS files
0 CSS files
1 Third-party domains

Brand Colours

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