How accurate is the stack score?
The score is directional, not absolute. We combine many structural and content signals to estimate how likely a site is to be WordPress, Webflow, Squarespace, Wix, Shopify, Framer, Next.js, or custom-built.
Identify any site's
stack in seconds.
Paste any URL. Get a likely stack label, supporting fingerprints, and practical differentiation tips in 5 to 20 seconds.
50+ signals
Code, content, deployment, and design fingerprints.
5 to 20 seconds
Typical time to get a likely stack label.
No sign-up required
Try 5 scans per day before you decide.
No install required
Private by default
Public URLs only
What does IsThisSiteAI do?
We tell you what powers a site,
not just whether it feels
AI-made.
Most tools give you a vague guess. This one gives you a builder, CMS, framework, AI-builder, or custom-stack label with the evidence behind it. Built because that tool didn't exist yet.
Stack Identification
Detects whether a site is WordPress, Wix, Squarespace, Webflow, Shopify, Framer, Next.js, or one of the major AI builders such as v0, Lovable, Bolt, Dora, or Cursor. The signature library keeps expanding as new tools emerge.
Multi-layer Fingerprinting
We check code structure, CSS patterns, meta signals, deployment headers, font stacks, and content across multiple pages - not just the homepage.
Content & Design Signals
Picks up template-style copy patterns, structural tells in layout, and design uniformity that hand-built sites rarely exhibit.
Explainable Confidence Score
A 5-98 score assembled from 50+ signals, weighted and dampened to keep false positives low. Every result shows you exactly which signals drove the stack label.
Pro
Semantic Reasoning for more accurate results
A second semantic pass reads the page the way a human would, evaluating tone, logic, and originality. Catches what rule-based systems miss.
Pro
Differentiation Tips
Specific, actionable advice on how to make the site feel more distinctive, more owned, and less template-driven.
How it Works
From URL to stack label
in around 5 to 20 seconds.
01
Paste any URL
Drop in any website address. No signup, no browser extension, no install. Just a URL.
Works on any publicly accessible site: Framer, Webflow, Squarespace, custom builds, and everything in between.
02
We fetch and analyse
Our engine retrieves the rendered page and probes additional sub-pages for deeper signal coverage. We are not just reading the homepage.
50+ distinct signals are checked across code structure, content patterns, deployment metadata, and design characteristics.
03
Signals are scored
Each signal carries a calibrated weight. Scores are combined, dampened to reduce noise, and clamped to produce a reliable 5-98 result.
Direct CMS and builder matches carry the most weight. Ambiguous signals are treated conservatively.
04
You get your answer
A primary stack label, a score, and the top signals that drove it, explained in plain language. The free plan shows the essentials. Pro unlocks everything.
Pro adds semantic reasoning for more accurate results, full signal breakdown, and on-demand differentiation tips. Scan history is included.
FAQ
Questions before you scan
Why can a hand-built site still show builder signals?
Modern sites often share frameworks, components, and patterns. We look at combined evidence, so a few overlapping signals do not automatically mean the site came from an AI builder or a template-heavy stack.
Do you store the websites I scan?
We store the submitted URL, score, stack label, fired signals, builders, scan timing, and your account ID (or IP-derived anonymous quota key) for quota enforcement, quality monitoring, and history. We do not publish your scan history publicly.
What does Pro include?
Pro includes full fingerprint visibility, semantic reasoning for more accurate results, on-demand differentiation tips, and higher daily scan limits.
Can I make my site feel less template-driven after scanning?
Yes. Pro includes targeted improvement tips based on detected signals to make content, structure, and design feel more distinctive and more clearly owned.
Pricing
Start free.
Grow when you need to.
MonthlyYearly
Free
No sign-up required (daily limits apply)
0€
Free forever
- Stack confidence score
- Top 3 supporting fingerprints
- Confidence level indicator
- 5 scans per day
Recommended
Pro
For deeper analysis, more accurate results, and higher limits
9€/month
- Everything in Free
- All supporting fingerprints
- Semantic reasoning for more accurate results
- Actionable differentiation tips
- Rescan to verify fixes
- Scan history
- 50 scans per day
No credit card required. Cancel anytime.