Testudy | Tech Stack & Analysis

What we found

Analytics set tracking cookies before any opt-in, and we found no consent manager.
DMARC only monitors (p=none), so email spoofing this domain is still delivered.
The page is missing Open Graph sharing tags, a canonical URL, and Twitter card tags.
Built with Next.js and React, the site is hosted on A2 Hosting and served through Cloudflare.

Built with: 22 technologies

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For light pages

<a href="https://firstsited.com/launch/p3l7magi/testudy"><img src="https://firstsited.com/badge/p3l7magi/stack.svg" alt="Testudy tech stack on FirstSited" height="28"></a>

For dark pages

<a href="https://firstsited.com/launch/p3l7magi/testudy"><img src="https://firstsited.com/badge/p3l7magi/stack.svg?theme=dark" alt="Testudy tech stack on FirstSited" height="28"></a>

How it fits together

Each technology runs on, or extends, the one it sits under.

React Framework
- Next.js Meta-framework

Technology	Type
Infrastructure
Cloudflare	CDN
SuperCP	DNS
A2 Hosting	Hosting
HTTP/3	Protocol
Cloudflare Bot Management	Security
HSTS	Security
Email
Brevo (6)	Email marketing
MailChannels	Transactional email
Build & Framework
Auth.js (2)	Auth
Tailwind CSS	CSS framework
React (3)	Framework
Next.js (6)	Meta-framework
Lucide Icons	UI library
Radix UI	UI library
shadcn/ui	UI library
YouTube	Video
Analytics & Marketing
Google Analytics (2)	Analytics
PostHog (6)	Analytics
Google Search Console	SEO
Google Tag Manager (2)	Tag management
Business Tools
Driver.js	Onboarding
AI & Emerging
Google Gemini API	AI API

Each technology links to its own page: which other new sites launched with it.

Site checks

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

Security headersHow we check
	Referrer-Policy
	X-Frame-Options
	Permissions-Policy experimental
	X-Content-Type-Options
	Content-Security-Policy
	Strict-Transport-Security
	X-XSS-Protection deprecated, not counted

Legal pages
	Privacy policy /en/privacy-policy
	Terms of service /en/terms-conditions
	Consent manager not detected; analytics set tracking cookies on our visit with no opt-in step

Mentions: GDPR, Cookies, Do Not Sell

Crawl files
	robots.txt
	sitemap.xml 180 URLs
	security.txt optional
	llms.txt optional
	ads.txt only for ad-funded sites
	humans.txt optional

AI crawlers No stanceHow we check
	llms.txt published not published
	No AI bots blocked in robots.txt
	Content-Signal none declared
	Link headers none advertised

Email

Record	Status	What it does
SPF ~all	Soft-fail (~all), common and accepted	Lists the servers allowed to send email for the domain.
DMARC p=none	Monitoring only (p=none)	Tells receivers what to do with email that fails SPF or DKIM.
DKIM	Found	Signs outgoing email. We check common selectors only, so a provider may use another.
MTA-STS	Not deployed	Stops email to the domain being downgraded to plain text in transit.
TLS-RPT	Not configured	Sends the owner reports of failed encrypted deliveries.

Hosting and network

Network	HETZNER-AS - Hetzner Online GmbH, DE AS24940, DE
DNS	SuperCP authoritative nameservers
DNSSEC	Not enabled DNS answers are unsigned
Certificate	Let's Encrypt valid 23 Sep 2026 to 22 Dec 2026, as captured
Green hosting	Yes per The Green Web Foundation
Page build	35 JS files, 2 CSS files 2 third-party domains, code splitting
Brand colours

Storage: 16 items

Cookies 5
Name	Lifetime	Set by
NEXT_LOCALE	1y	-
ph_phc_lBWalVPAx0856bMsIIelLQRpJZ7EJjxR5BapCyxfCGN_posthog	1y	-
__cf_bm	< 1h	Cloudflare
__Host-next-auth.csrf-token	session	-
__Secure-next-auth.callback-url	session	Auth.js

Local storage 7
Key	Size	Set by
ab_variant:landing_headline_sep_2026	1 B	-
ab_visitor_id	36 B	-
BrevoConversations.clientId	40 B	Brevo
BrevoConversations.lastPageViewAt	13 B	Brevo
BrevoConversations.referrer	0 B	Brevo
nextauth.message	74 B	Auth.js
ph_phc_lBWalVPAx0856bMsIIelLQRpJZ7EJjxR5BapCyxfCGN_posthog	1.4 KB	PostHog

Session storage 4
Key	Size	Set by
ph_phc_lBWalVPAx0856bMsIIelLQRpJZ7EJjxR5BapCyxfCGN_posthog	388 B	PostHog
ph_phc_lBWalVPAx0856bMsIIelLQRpJZ7EJjxR5BapCyxfCGN_primary_window_exists	4 B	PostHog
ph_phc_lBWalVPAx0856bMsIIelLQRpJZ7EJjxR5BapCyxfCGN_session_registered_properties	286 B	PostHog
ph_phc_lBWalVPAx0856bMsIIelLQRpJZ7EJjxR5BapCyxfCGN_window_id	38 B	PostHog

Performance

Measure	This site	Reading
Server response	205 ms	good, faster than 58% of sites
Largest contentful paint	680 ms	good
Layout shift	0.05	good
Page weight	1.6 MB	fair
Third-party domains	2
Console errors	0	none
Failed requests	0	none

From a single automated render of the home page. A quick guide, not a substitute for Lighthouse or field data. How we measure

Notes

Looks AI-built: some AI signals. How much the site looks AI-generated. It is a pattern match shown for interest, not a verdict.

Which signals fired

Signal	Points
AI CSS signals	+10
AI copy signals	+5
AI onboarding signals	+5
AI palette signals	+5
AI writing signals	+5
AI stack signals	+10
AI layout signals	+5

Analytics set tracking cookies on our visit and no consent manager was detected. UK and EU GDPR require opt-in before tracking runs, and more than 20 US states require honouring opt-out requests.
Performance comes from one render on 9 November 2026 and will vary between visits.

How we know

FirstSited records what new websites are built with, usually within a day of going live. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We checked this one in full: its tech stack, DNS, security headers and page basics. This page is what we saw on 9 November 2026; the live site may have changed since.

Every technology below links to its own page: which other new sites launched with it. Watch any of them and get every new site that uses it as it goes live, from £15 a month.