Methodology
Not a black box.
Every score has a source.
Most AI tools give you a number. Corexi gives you the number, the research it comes from, the evidence behind it, and the code to fix it. Here is exactly how we measure product experience.
01 — The score
One number. Five dimensions. Weighted.
Your PX Score is a weighted composite of five UX dimensions. Each dimension is derived from 9 core evaluation categories plus 2 neurodiversity layers. The formula is public, not hidden.
Multi-viewport: desktop carries 60%, mobile 40%. Each scan accumulates product context, so scores get sharper over time.
02 — What we measure
9 core categories
Every page scan is evaluated across these categories. Each has measurable criteria rooted in 200+ peer-reviewed sources. Every accessibility finding is cross-checked against axe-core.
Visual Hierarchy
Is the most important element the first to catch attention? Are headings differentiated? Is the visual flow logical?
CTA Visibility
Can you find the primary action in under 2 seconds? Is contrast above WCAG AA 4.5:1? Is sizing appropriate?
Form Design
Are labels present and readable? Are error states designed? Are inputs sized for touch and keyboard?
Spacing & Layout
Is white space consistent? Is a grid system present? Are there cramped or scattered areas?
Typography
Are fonts readable at 16px+ body? Is line length 45-75 characters? Does weight create hierarchy?
Color & Contrast
Does text pass WCAG AA? Is the palette consistent? Is color ever the sole information carrier?
Mobile Responsiveness
Are touch targets 44x44px+? Is there horizontal scroll? Is text readable on a phone?
Cognitive Load
Can a first-time user understand what to do? Is navigation clear? Is there decision paralysis?
Accessibility
Alt text, form labels, keyboard nav, ARIA, focus indicators. Every claim axe-core verified.
03 — Beyond standard UX
+2 neurodiversity categories
WCAG covers compliance. It does not cover whether a neurodivergent user can actually use your product. Corexi scores Color Vision Deficiency and Dyslexia Readability as first-class scan categories. No other automated tool does this.
Color Vision Deficiency
Red/green combinations, color as sole info carrier, problematic color pairs. Scored as a dedicated scan category.
Dyslexia Readability
Line length, letter spacing, justified text, ALL CAPS blocks, contrast below 7:1. Scored as a dedicated scan category.
04 — Real user data
7 analytics providers. One confidence score.
Visual analysis tells you what looks wrong. Behavioral data tells you what actually hurts. Connect your existing analytics and Corexi fuses both into a single score. The more you connect, the sharper the findings.
| Provider | Window | Signal |
|---|---|---|
| GA4 | 7 days | Sessions, bounce rate, engagement |
| Clarity | 72 hours | Rage clicks, dead clicks, quick-backs |
| Mixpanel | 7 days | Event volume, active days |
| Amplitude | 7 days | Active users, event cadence |
| PostHog | 7 days | Events, active users (deduped) |
| Firebase | Auth | Mobile app analytics |
| Hotjar | Auth | Survey and feedback data |
~40%
Visual AI only
~65%
+1 provider
85-95%
+2-3 providers
05 — Verification
Verified, not guessed.
Every accessibility finding is cross-checked against axe-core at runtime. Verified findings carry a badge. LLM-only findings stay flagged. You always know which is which.
Verified finding
AI detected an issue AND axe-core confirmed it against WCAG 2.2 rules. 27 rule IDs checked. This is the standard for compliance claims.
AI-only finding
AI detected a potential issue but no deterministic rule confirmed it. Flagged for human review. Transparent about confidence level.
06 — Data principles
Privacy-first. Always.
Zero new tracking
We never add scripts, cookies, or SDKs to your product. Your users do not know Corexi exists.
Read-only analytics
We connect to your existing providers via read-only API. We pull aggregated metrics only.
No PII, ever
Bounce rates, session depth, engagement patterns. Never individual identities, emails, or browsing histories.
EU-based, GDPR compliant
All processing on EU infrastructure. Credentials encrypted at rest (AES-256). Disconnect and delete any time.
See it in action.
Paste a URL and get your PX Score, or explore how the engine works under the hood.