Opensource UI

opensourceui is a free, open-source library of 250+ production-ready UI components for React and Next.js. Built with TypeScript and Tailwind CSS v4. Explore live previews at opensourceui.in.

Developer Tools

Estimated origin: India

Added July 11, 2026 · Last analysed July 11, 2026 · via · 71% 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 11 July 2026; the live site may have changed since.

Opensource UI is partway there, with a thorough launch checklist and clean crawl signals. Worth fixing first: missing several security headers, incomplete legal pages, and tracking cookies set before any opt-in.

Launched on Product Hunt on July 11, 2026. The site is hosted on Vercel, with a domain registered 10 months before launch. The crawl picked up 9 technologies on this site, covering ui library, analytics, CSS frameworks, and DNS providers. The stack includes Next.js, React, and Tailwind CSS.

For context, it's running the same core stack as 9,991 other launches.

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

5.1

StackScope Score

Fair

88/100 Launch Readiness

Launch ready

1/6 Security Headers

Poor

0/3 Legal

Missing

2/2 Crawl files

Complete

84/100 Performance

Fast

Vibe Score 50 · Many 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 (9)

Infrastructure

DNS	Vercel DNS
Hosting	Vercel
Security	HSTS

Build & Framework

CSS framework	Tailwind CSS
Framework	React
Meta-framework	Next.js (5)
UI library	Lucide Icons
UI library	shadcn/ui

Analytics & Marketing

Analytics	PostHog (4)

Infrastructure

Network

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

AS16509 · US

DNS

Vercel DNS

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 13 Jun 2026 to 11 Sep 2026

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

Domain Age

10 months

Registered Aug 2025 · HOSTINGER operations, UAB

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 (7)

Cookies (1)

Name	Lifetime	Detected as
ph_phc_vZaRXuHLEeiMdxHBjoZNgKAyRLPtiFT7bpG7phJamQtZ_posthog	1y	PostHog

Local storage (2)

Key	Size	Detected as
oui_vid	36 B	-
ph_phc_vZaRXuHLEeiMdxHBjoZNgKAyRLPtiFT7bpG7phJamQtZ_posthog	1.7 KB	PostHog

Session storage (4)

Key	Size	Detected as
oui_sid	36 B	-
ph_phc_vZaRXuHLEeiMdxHBjoZNgKAyRLPtiFT7bpG7phJamQtZ_posthog	388 B	PostHog
ph_phc_vZaRXuHLEeiMdxHBjoZNgKAyRLPtiFT7bpG7phJamQtZ_primary_window_exists	4 B	PostHog
ph_phc_vZaRXuHLEeiMdxHBjoZNgKAyRLPtiFT7bpG7phJamQtZ_window_id	38 B	PostHog

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

⚠

Page title is 69 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.

⚠

Meta description is 190 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?

471 ms Server response

38% Faster than peers

1264 ms Largest contentful paint

0.02 Cumulative layout shift

1.4 MB Page weight

943 KB Image weight

2 Third-party domains

0 Console errors

0 Failed requests

⚠ 20 images: 8 oversized, 5 without width/height, 11 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 stack signals	+10
Recognised AI builder signature	+30

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.

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 (1 URLs)

✗ security.txt

✗ llms.txt

✗ ads.txt

✗ humans.txt

Legal

? Privacy Policy not detected

? Terms of Service not detected

? Consent manager not detected

Analytics set tracking cookies on our visit, with no opt-in step.

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

✓ Code splitting

18 JS files

2 CSS files

2 Third-party domains

Brand Colours

App Manifest

opensourceui

display: standalone 1 icon

theme #171717

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.