Verdict
Choose Google Lighthouse when
- Free tools matters to you. Strong free utility value for page audits and regression checks.
- Technical SEO matters to you. Useful page-level technical SEO and quality audits, but not a full site crawler.
- GEO readiness matters to you. Some experimental machine-readability checks, but no full GEO workflow.
- Agent readiness level matters to you. Useful as an automated audit input, but not an autonomous SEO agent workflow.
Verdict
Choose Nozzle when
- Research depth matters to you. Strong SERP research depth: full-result collection, snapshots, 400+ fields, historical storage and research workspaces.
- Keyword research quality for SEO content matters to you. Strong keyword/SERP insight and clustering, but not positioned as a broad keyword-volume/discovery suite.
- Context gathering matters to you. Gathers rich SERP, competitor, brand-property, local and GSC keyword context; no evidence of internal-company or arbitrary third-party app context.
- Measurement & tracking matters to you. Excellent measurement: rank, ad-adjusted rank, pixels from top, above-fold and SERP share, CTR, estimated traffic, PPC value, snapshots and share of voice.
These tools solve different jobs. Scores are shown against each tool's own category, so the overall grades are not directly comparable. How grades work.
Read the full reviews: Google Lighthouse and Nozzle.