Google's free hosted Lighthouse with real-user (CrUX) field data · Pricing: Free
PageSpeed Insights and SEO Score API both touch SEO, but they are different shapes of product. PageSpeed Insights is a Web tool + REST API (free, throttled); SEO Score API is a hosted REST API that returns a scored audit as JSON in about two seconds. This page is an honest side-by-side — including when you should pick PageSpeed Insights over us.
| Feature | PageSpeed Insights | SEO Score API |
|---|---|---|
| Pricing | Free | $0 free, $5+ / mo |
| Focus | Performance + Web Vitals | SEO + AI readability + performance |
| Real-user (CrUX) data | Yes | No |
| AI readability score | No | Yes |
| SXO / AEO / AIO scores | No | Yes (Starter+) |
| API quotas | 25k/day shared, ~400/100s key | Per-plan, dedicated |
| Per-key auth | Optional | Required (X-API-Key) |
| Output | JSON (Lighthouse + CrUX) | Compact scored JSON with priorities |
| CI/CD examples | Build your own | Official GitHub Action |
| Schema / structured-data checks | Limited | Detailed |
Only partly. We include performance signals but not the full Lighthouse trace and not CrUX field data. For Core Web Vitals from Google, keep using PSI. For broader SEO + AI readiness checks across many URLs, use us.
PSI is free and excellent for spot checks. At higher volume you hit quotas (25k/day shared globally, ~400 requests per 100s per key) and you'd build the rest of the stack yourself: batch, history, alerts, scoring layer, broader SEO depth. SEO Score API covers that out of the box.
We surface page response time, HTML size, DOM size, and render-path basics, but not full Web Vitals. If Web Vitals is your priority, run PSI alongside us.
Yes — every audit checks JSON-LD presence, validates types, and reports gaps. PSI's structured-data coverage is comparatively shallow.
Run an audit in your terminal in 30 seconds.