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Thumbai

Thumbai is an AI YouTube thumbnail maker. Paste a video link and get a click-worthy, on-brand thumbnail in seconds. The AI reads the video, picks the best scenes, and designs it for you.

Added August 11, 2026 · Last analysed August 11, 2026 · via

Own this Launch?
Screenshot of Thumbai

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

Thumbai scores highly overall, with complete legal pages, a complete set of security headers, and a thorough launch checklist. Main gaps: incomplete email security.

Launched on Product Hunt on August 11, 2026. The site is hosted on Railway and served through Cloudflare, with a domain registered 7 weeks before launch. We've detected 14 technologies on this site, covering analytics, auth, captcha, and CDN. The stack includes Expo, Google Sign-In, and Tailwind CSS.

It's the only launch we've crawled on this exact stack and more locked down than the typical Product Hunt launch.

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

9.7
StackScope Score
Excellent
88/100 Launch Readiness
Launch ready
6/6 Security Headers
Strong
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 (14)

Infrastructure
CDN Cloudflare
DNS Cloudflare DNS
Hosting Railway
Security HSTS
Email
Business email Spaceship Mail (2)
Build & Framework
Auth Google Sign-In
Captcha Cloudflare Turnstile
CSS framework Tailwind CSS
Font Google Fonts
Meta-framework Expo
Analytics & Marketing
Analytics Cloudflare Web Analytics
SEO Google Search Console
Commerce & Payments
Payments Lemon Squeezy
Business Tools
Fraud prevention FingerprintJS

Infrastructure

Network
CLOUDFLARENET - Cloudflare, Inc., US
AS13335 · US
DNS
Cloudflare 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
Google Trust Services
Valid 21 Jun 2026 to 19 Sep 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
1 month
Registered Jun 2026 · Spaceship, Inc.

Email Security

✓
SPF ~all Soft-fail (~all). Common and accepted.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✗
DMARC p=none None (p=none). Monitoring only.
?
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
⚠
Meta description is 186 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.
- Semantic HTML (nav, main, article)

Performance How?

260 ms Server response
55% Faster than peers
1564 ms Largest contentful paint
0.01 Cumulative layout shift
624 KB Page weight
292 KB Image weight
3 Third-party domains
0 Console errors
0 Failed requests

⚠ 12 images: 10 oversized, 12 without width/height, 12 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

Blocks AI crawlers
✗ llms.txt published
✗ 9 AI bots blocked in robots.txt
Content-Signal
✗ ai-train = no
✓ search = yes
? ai-input (not declared)
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✓ sitemap.xml (5 URLs)
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

✓ Privacy Policy
/privacy
✓ Terms of Service
/terms
? Analytics present, but it set no tracking cookies on our visit (it may be opt-in-gated).
86% unique
Mentions:
Updated: June 21, 2026

Security Headers (6/6)

✓
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
3 CSS files
3 Third-party domains

Brand Colours

App Manifest

Thumbai
display: standalone 2 icons
theme #0f0f0f
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.