SAGIScan vs Google Lighthouse
Compare SAGIScan's 175 AI agents with Google Lighthouse. See why AI-powered analysis goes far beyond performance and accessibility scores.
Updated May 2026
Google Lighthouse is a free, open-source tool built into Chrome DevTools that audits performance, accessibility, best practices, and SEO. SAGIScan goes far beyond Lighthouse's scope with AI-powered analysis across four pillars. Here's the full comparison.
| Feature | SAGIScan | Google Lighthouse |
|---|---|---|
| Cost | $5/page | Free |
| Analysis Engine | 175 AI contextual agents | Automated rule checks |
| SEO Depth | ✅ 50 agents (deep) | ⚠️ Basic (14 checks) |
| AEO Coverage | ✅ 34 agents | ❌ Not available |
| GEO Coverage | ✅ 35 agents | ❌ Not available |
| ISO Compliance | ✅ 36 agents | ❌ Not available |
| Performance Metrics | ✅ CWV + context | ✅ CWV + detailed labs |
| Accessibility | ✅ AI contextual check | ✅ Automated WCAG subset |
| Multi-Page Scan | ✅ Full site | ❌ Single page only |
| Fix Instructions | ✅ AI-written, specific | ⚠️ Generic docs links |
| Fix Implementation | ✅ Fix It For Me | ❌ DIY only |
| Content Quality | ✅ E-E-A-T analysis | ❌ Not checked |
SAGIScan Strengths
- 175 AI agents analyze context and meaning, not just metrics
- AEO pillar — AI chatbot visibility (Lighthouse can't check)
- GEO pillar — AI Overviews optimization (Lighthouse can't check)
- Industry-specific compliance and best practices
- Actionable fix instructions for every issue
- Professional Fix It For Me implementation
- Multi-page scanning across your entire site
Google Lighthouse Strengths
- Free and built into Chrome — zero cost
- Performance scoring with lab data
- Core Web Vitals measurement
- Accessibility audit (partial WCAG)
- PWA (Progressive Web App) checks
- Developer-oriented diagnostic details
Our Verdict
Lighthouse is a great free starting point for performance and basic checks. SAGIScan is the next step — AI-powered analysis covering SEO depth, AI visibility (AEO/GEO), industry compliance, and content quality that Lighthouse simply can't evaluate. Use Lighthouse for quick dev checks, SAGIScan for serious optimization.
Frequently Asked Questions
If Lighthouse is free, why pay for SAGIScan?
Lighthouse checks ~14 basic SEO items and focuses heavily on performance. SAGIScan's 175 AI agents check 10x more factors, including AI visibility (AEO/GEO), content quality (E-E-A-T), industry compliance, and provides specific fix instructions. Lighthouse tells you scores; SAGIScan tells you WHY and HOW to fix.
Does SAGIScan include everything Lighthouse checks?
SAGIScan covers all the SEO and accessibility areas Lighthouse checks, plus much more. For raw performance lab data (Time to Interactive, Total Blocking Time at ms precision), Lighthouse provides more granular metrics. SAGIScan focuses on actionable optimization rather than raw diagnostics.
Should I run Lighthouse before or after SAGIScan?
Run SAGIScan first for comprehensive analysis and fix prioritization. Use Lighthouse afterward for quick performance verification as you implement fixes. Lighthouse is a thermometer; SAGIScan is the doctor.
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