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ClassKeep

Streamlined scheduling and retention platform for studio classes. Automate waitlists, credit packages, and booking so owners can focus on teaching.

Education
Portugal Estimated origin: Portugal

Added May 19, 2026 · Last analysed May 19, 2026 · via Hacker News

StackScope records what new websites are built with, the week they launch. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We crawled this one for its tech stack and scored it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 19 May 2026; the live site may have changed since.

Every technology below links to its own page: which other new sites launched with it. Vendors and agencies watch those pages with Stackdar and hear about new adopters the week they ship, from £15 a month.

ClassKeep scores highly overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. Visible gaps: missing Permissions-Policy and Content-Security-Policy and incomplete email security.

Launched on Hacker News on May 19, 2026. The site is hosted on Contabo in Germany, with a domain registered 8 weeks before launch. Our crawler found 10 technologies on this site, covering CSS frameworks, DNS providers, business email, and email forwarding. The stack includes Next.js, React, and Tailwind CSS.

It's also on one of the most common stacks we track, shared by 5,772 launches and more locked down than the typical Hacker News launch.

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

8.8
StackScope Score
Excellent
90/100 Launch Readiness
Launch ready
3/3 Legal
Complete
2/2 Crawl files
Complete
Vibe Score 30 · Some 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 (10)

Infrastructure
DNS Namecheap DNS
Protocol HTTP/3
Security HSTS
Email
Business email PrivateEmail
Email forwarding Namecheap Email Forwarding (2)
Build & Framework
CSS framework Tailwind CSS
Font Google Fonts
Framework React
Meta-framework Next.js (3)
Analytics & Marketing
SEO Google Search Console

Infrastructure

Network
AS51167 · DE
DNS
Namecheap 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 30 Apr 2026 to 29 Jul 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
5 months
Registered Mar 2026 · Namecheap 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 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 (1)

Cookies (1)
NameLifetimeDetected as
NEXT_LOCALE session Next.js

Readiness Breakdown How?

Custom title and meta description
Open Graph tags (title, image, description) (partial) missing og:image
Twitter card meta tags
Canonical URL declared
Responsive viewport meta tag
Favicon present
Semantic HTML (nav, main, article)

Vibe Score Breakdown How?

SignalPoints
AI CSS signals +10
AI copy signals +5
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.

AI Stance

No AI stance declared
llms.txt published
No AI bots blocked in robots.txt
? No directive declared
? None advertised

Well-Known Files

robots.txt
sitemap.xml (22 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/legal/privacy
Terms of Service
/legal/terms
94% unique

Security Headers (4/6)

Permissions-Policy experimental (check browser support)
Content-Security-Policy report-only, so nothing is enforced yet
X-XSS-Protection deprecated (use Content-Security-Policy)

Performance

397ms response time
Faster than 43% of sites
2 third-party domains loaded

Build

Code splitting
19 JS files
3 CSS files
2 Third-party domains

Brand Colours

App Manifest

ClassKeep
display: standalone 5 icons
theme #4F6F52
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.