Method

How the verdict is computed

No language model is involved in the verdict. A scan fetches the page once, server-side, and runs a fixed rule set against it. The same input always produces the same output, and every point is attributable to a named rule.

Pipeline

The URL is normalised, and refused if it resolves to a private or reserved address.
The page is fetched with a desktop browser User-Agent, following up to 5 redirects, with a hard 10 second budget. Nothing on the target is executed.
The HTML is tokenised into a flat description: tags with attributes and nesting depth, visible text, comments, inline scripts. robots.txt and sitemap.xml are fetched separately, and up to 10 subresources are size-probed with HEAD requests.
Rules and structural checks run against that description, producing evidence rows.
Evidence is scored by family, weighted, and turned into a verdict.

Scoring

The fingerprint family takes the strongest single match plus 5 points per corroborating match (capped at 100), because one conclusive fingerprint should not be diluted by the absence of others. The other three families are additive: many small smells add up. Families are then weighted 50 / 25 / 15 / 10.

AI-built requires a direct AI-builder fingerprint scoring 80 or more. Confidence is floored at 85.
Likely AI-assisted means either a weaker AI-builder fingerprint, or no fingerprint but a weighted total of 55 or more.
A classic visual builder such as Wix, Webflow or Framer never produces "AI-built" on its own. Those platforms ship AI features, so they count toward "AI-assisted" only.
Deployment platforms (Vercel, Netlify, Cloudflare Pages) are weak evidence by design. They corroborate; they do not convict.

Active rule set

103 enabled rules

Rule	Builder	Family	Signal type	Pattern	Weight
Lorem ipsum placeholder copy	-	content	text	lorem ipsum\|dolor sit amet\|consectetur adipiscing	40
Placeholder brand name	-	content	text	your (company\|brand\|business) name\|company name here\|your (company\|brand) here\|\[your (company\|brand)\]\|\[company name\]\|acme (inc\|corp\|co)\b	30
Untouched default hero copy	-	content	text	welcome to your new (website\|site\|app)\|build something amazing\|start building your\|your journey starts here\|edit this text\|click to edit\|this is a paragraph\|add your text here	30
Placeholder contact details	-	content	text	example@example\.com\|your@email\.com\|123-456-7890\|555-555-5555\|123 main st	20
Placeholder legal or footer text	-	content	text	all rights reserved\.? (your\|company name)\|\[company\]\|\{\{\s\w+\s\}\}	15
Lovable / GPT Engineer script host	Lovable	fingerprint	script_host	(^\|\.)gpteng\.co$	100
Lovable hosting domain	Lovable	fingerprint	host	(^\|\.)lovable(project)?\.app$	100
Lovable generator meta tag	Lovable	fingerprint	meta_generator	lovable	100
v0 generator meta tag	v0 by Vercel	fingerprint	meta_generator	v0(\.dev\| by vercel)	100
Durable generator meta tag	Durable	fingerprint	meta_generator	durable	100
v0 generator meta tag (v0.app)	v0 by Vercel	fingerprint	meta_generator	v0\.app	100
v0 hosting domain	v0 by Vercel	fingerprint	host	(^\|\.)v0\.(build\|dev)$	95
Bolt generator meta tag	Bolt.new	fingerprint	meta_generator	bolt\.new\|stackblitz	95
Bolt hosting domain	Bolt.new	fingerprint	host	(^\|\.)bolt\.host$	95
Framer generator meta tag	Framer	fingerprint	meta_generator	framer	95
Wix generator meta tag	Wix	fingerprint	meta_generator	wix\.com\|wix website builder	95
Wix response header	Wix	fingerprint	header	^x-wix-[a-z-]*:	95
Webflow generator meta tag	Webflow	fingerprint	meta_generator	webflow	95
Figma Make source marker	Figma Make	fingerprint	html	created in figma make\|isFigmake:\s*true\|<title>figma make app</title>	95
Base44 page-view logger	Base44	fingerprint	html	/api/app-logs/[0-9a-f]{24}/log-user-in-app	92
Anything (Create) asset CDN	Anything	fingerprint	script_host	^cdn\.created\.app$	92
Emergent runtime script host	Emergent	fingerprint	script_host	^assets\.emergent\.sh$	92
Macaly badge or platform script	Macaly	fingerprint	html	data-macaly-badge\|made with ai in macaly\|macaly\.com/js/(platform-app\|macaly)\.js\|assets\.macaly-user-data\.dev	92
Floot runtime marker	Floot	fingerprint	html	__FLOOT_CSS_ORDER__\|floot\.com/t\.js\|assets\.floot\.app/	92
Wegic asset CDN	Wegic	fingerprint	script_host	^cdn\.wegic\.ai$	92
Gamma Sites script host	Gamma	fingerprint	script_host	^assets\.gammahosted\.com$	92
Softr source comment or asset host	Softr	fingerprint	html	was created in softr\|assets\.softr-files\.com/	92
Lovable project badge or backlink	Lovable	fingerprint	html	lovable-badge\|lovable\.dev/projects\|lovable\.app/projects\|data-lovable	90
v0 script host	v0 by Vercel	fingerprint	script_host	(^\|\.)v0\.dev$	90
Replit hosting domain	Replit	fingerprint	host	(^\|\.)replit\.(app\|dev)$\|(^\|\.)repl\.co$	90
Durable asset host	Durable	fingerprint	script_host	(^\|\.)durable\.co$\|(^\|\.)durablesites\.com$	90
Base44 hosting domain	Base44	fingerprint	host	(^\|\.)base44\.app$	90
Hostinger AI / Zyro generator meta tag	Hostinger AI Builder	fingerprint	meta_generator	hostinger\|zyro	90
Framer hosting domain	Framer	fingerprint	host	(^\|\.)framer\.(website\|app\|ai)$	90
Wix static asset host	Wix	fingerprint	script_host	(^\|\.)parastorage\.com$\|(^\|\.)wixstatic\.com$	90
Wix hosting domain	Wix	fingerprint	host	(^\|\.)wixsite\.com$\|(^\|\.)editorx\.io$	90
Webflow data attributes	Webflow	fingerprint	html	data-wf-page\|data-wf-site\|data-wf-domain	90
Webflow hosting domain	Webflow	fingerprint	host	(^\|\.)webflow\.io$	90
Squarespace generator meta tag	Squarespace	fingerprint	meta_generator	squarespace	90
Replit default meta description	Replit	fingerprint	meta_any	built on replit\. update this description	90
Base44 auth storage key in the JS bundle	Base44	fingerprint	bundle	base44_access_token\|base44SharedInstances	90
Anything (Create) hosting domain	Anything	fingerprint	host	(^\|\.)created\.app$	90
Emergent hosting domain	Emergent	fingerprint	host	(^\|\.)emergent\.host$\|\.preview\.emergentagent\.com$	90
Emergent runtime or asset reference	Emergent	fingerprint	html	emergent\.sh/scripts/emergent-main\.js\|customer-assets\.emergentagent\.com	90
Macaly hosting domain	Macaly	fingerprint	host	(^\|\.)macaly\.app$	90
Floot hosting domain	Floot	fingerprint	host	(^\|\.)floot\.app$	90
Wegic hosting domain	Wegic	fingerprint	host	(^\|\.)wegic\.app$	90
Wegic default OpenGraph title	Wegic	fingerprint	meta_any	made with wegic	90
Gamma Sites hosting domain	Gamma	fingerprint	host	(^\|\.)gamma\.site$	90
Figma Sites hosting domain	Figma Sites	fingerprint	host	(^\|\.)figma\.site$	90
Durable hosting domain	Durable	fingerprint	host	(^\|\.)(durable\.co\|mydurable\.com)$	90
Softr hosting domain	Softr	fingerprint	host	(^\|\.)softr\.app$	90
Typedream hosting domain	Typedream	fingerprint	host	(^\|\.)typedream\.(app\|page)$	90
Typedream default description	Typedream	fingerprint	meta_any	a website made with typedream	90
v0 default project domain	v0 by Vercel	fingerprint	host	^v0-[a-z0-9-]+\.vercel\.app$	88
Base44 media CDN	Base44	fingerprint	html	media\.base44\.com/	88
Durable asset storage	Durable	fingerprint	html	durable\.sfo3\.cdn\.digitaloceanspaces\.com\|cdn\.durable\.co/	88
Lovable default OpenGraph image	Lovable	fingerprint	meta_any	lovable\.dev/opengraph\|gpteng\.co/[^"\s]*og	85
v0 source marker	v0 by Vercel	fingerprint	html	v0\.dev/chat\|data-v0-t=\|built with v0	85
Bolt source marker	Bolt.new	fingerprint	html	bolt\.new/~\|built with bolt\|__bolt	85
Replit badge or runtime marker	Replit	fingerprint	html	replit-badge\|__replco	85
Base44 script host	Base44	fingerprint	script_host	(^\|\.)base44\.(app\|com)$	85
10Web AI generator meta tag	10Web AI	fingerprint	meta_generator	10web	85
Mixo generator meta tag	Mixo	fingerprint	meta_generator	mixo	85
Framer asset host	Framer	fingerprint	script_host	(^\|\.)framerusercontent\.com$\|(^\|\.)framer\.com$	85
Webflow asset host	Webflow	fingerprint	script_host	(^\|\.)website-files\.com$\|(^\|\.)webflow\.com$	85
Shopify response header	Shopify	fingerprint	header	^x-shopify-stage:\|^x-shopid:	85
AI generation comment left in source	-	fingerprint	html	<!--\s*(generated\|created) (by\|with) (chatgpt\|claude\|gpt\|copilot\|cursor\|lovable\|bolt\|v0)	85
Lovable runtime package in the JS bundle	Lovable	fingerprint	bundle	@lovable\.dev/\|gptengineer\|gpt-eng\.com\|lovable-tagger	85
Base44 SDK in the JS bundle	Base44	fingerprint	bundle	@base44/sdk\|base44\.app/api	85
Figma Sites source marker	Figma Sites	fingerprint	html	content="created with figma"\|isFigmake:\s*false	85
Replit script host	Replit	fingerprint	script_host	(^\|\.)replit\.com$	80
Dora AI source marker	Dora AI	fingerprint	html	dora\.run\|__dora_	80
Softr generator meta tag	Softr	fingerprint	meta_generator	softr	80
Squarespace asset host	Squarespace	fingerprint	script_host	(^\|\.)squarespace\.com$\|(^\|\.)sqspcdn\.com$	80
Durable badge or backlink	Durable	fingerprint	html	durable\.co/\?\|made with durable	75
Shopify CDN host	Shopify	fingerprint	script_host	(^\|\.)shopifycdn\.com$\|(^\|\.)shopify\.com$	75
WordPress generator meta tag	WordPress	fingerprint	meta_generator	wordpress	70
Elementor generator meta tag	Elementor	fingerprint	meta_generator	elementor	70
Bubble generator meta tag	Bubble	fingerprint	meta_generator	bubble	70
Carrd generator meta tag	Carrd	fingerprint	meta_generator	carrd	70
Cursor / Copilot scaffold marker	-	fingerprint	html	data-cursor-generated\|__CURSOR_\|generated-by-copilot	70
Bolt / StackBlitz reference in the JS bundle	Bolt.new	fingerprint	bundle	bolt\.new\|webcontainer-api	70
Gamma media references	Gamma	fingerprint	html	cdn\.gamma\.app/\|imgproxy\.gamma\.app\|assets\.api\.gamma\.app	70
10Web hosting domain	10Web AI	fingerprint	host	(^\|\.)10web\.site$	70
Relume component library	Relume	fingerprint	script_host	(^\|\.)relume\.io$	65
Ghost generator meta tag	Ghost	fingerprint	meta_generator	ghost	60
Link to lovable.dev inside the JS bundle	Lovable	fingerprint	bundle	https?://lovable\.dev	60
Vercel preview domain	Vercel	fingerprint	host	(^\|\.)vercel\.app$	50
Netlify preview domain	Netlify	fingerprint	host	(^\|\.)netlify\.(app\|com)$	50
Vercel deployment header	Vercel	fingerprint	header	^x-vercel-id:\|^server: vercel	45
Netlify deployment header	Netlify	fingerprint	header	^x-nf-request-id:\|^server: netlify	45
Cloudflare Pages domain	Cloudflare Pages	fingerprint	host	(^\|\.)pages\.dev$	45
Render deployment domain	Render	fingerprint	host	(^\|\.)onrender\.com$	40
Fly.io deployment domain	Fly.io	fingerprint	host	(^\|\.)fly\.dev$	40
data-testid attributes shipped to production	-	hygiene	html	data-testid\s*=	18
Untouched shadcn/ui class vocabulary	-	hygiene	class_name	bg-background\|text-foreground\|text-muted-foreground\|bg-card\|border-border\|ring-offset-background	16
Default template layout classes left unrenamed	-	hygiene	class_name	min-h-screen\|container mx-auto\|hero-section\|feature-card\|cta-section\|section-wrapper	12
Vite / CRA single-root client-render shell	-	hygiene	html	<div id="root">\s</div>\|<div id="app">\s</div>	10
Default lucide icon classes	-	hygiene	class_name	lucide lucide-\|lucide-icon	8
TODO / FIXME comment left in shipped markup	-	hygiene	html	<!--[^>]*(TODO\|FIXME\|XXX)	8
Source map reference in the JS bundle	-	hygiene	bundle	sourceMappingURL=[^\s]+\.map	6
Source maps referenced in production output	-	hygiene	html	sourceMappingURL	6

Structural checks (nesting depth, utility-class bloat, missing canonical, absent JSON-LD and similar absence tests) cannot be expressed as patterns and live in code. They appear in the evidence table with the signal type "structural check".