Sparrow
Sparrow is a browser extension for inspecting CSS, measuring spacing, extracting colors, fonts, and assets, and leaving pinned feedback on any live website. Free to start.
Added August 1, 2026
· Last analysed August 1, 2026 · via 
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 1 August 2026; the live site may have changed since.
Sparrow looks production-ready overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. Visible gaps: missing several security headers, tracking cookies set before any opt-in, and no email security records.
Launched on Product Hunt on August 1, 2026. The site is hosted on Vercel and served through Cloudflare, with a domain registered 3 weeks before launch. We've detected 13 technologies on this site, covering security, ui library, analytics, and auth. The stack includes Clerk, Tailwind CSS, and Cloudflare.
It's on one of the most common stacks we track, shared by 2,731 launches.
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Tech Stack (13)
| CDN |
Cloudflare
|
| DNS |
Vercel DNS
|
| Hosting |
Vercel
|
| Security |
Cloudflare Bot Management
|
| HSTS |
| Auth |
Clerk
(3)
|
| CSS framework |
Tailwind CSS
|
| Developer tools |
Vite
|
| JavaScript library |
React Router
|
| UI library |
Lucide Icons
|
shadcn/ui
|
| Analytics |
Google Analytics
(4)
|
| Tag management |
Google Tag Manager
medium
|
Infrastructure
Email Security
Storage (8)
| Name | Lifetime | Detected as |
|---|---|---|
| _cfuvid | session | Cloudflare |
| _ga | 1y | Google Analytics |
| _ga_ZJPS32X5DB | 1y | Google Analytics |
| __cf_bm | < 1h | Cloudflare |
| __client | 1y | Clerk |
| __client_uat | 1y | Clerk |
| __client_uat_aBga2RG8 | 1y | Clerk |
| Key | Size | Detected as |
|---|---|---|
| __clerk_environment | 6.5 KB | Clerk |
Readiness Breakdown How?
Performance How?
⚠ 12 images: 2 oversized, 12 without width/height, 10 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.
Vibe Score Breakdown How?
| Signal | Points |
|---|---|
| AI palette signals | +5 |
| AI writing signals | +5 |
| AI layout signals | +5 |
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.