Google Lighthouse vs Semrush: which SEO tool fits your team?

Google Lighthouse

No keyword identification, clustering, volume, intent, or prioritization workflow.

Lighthouse SEO audits focus on page checks such as meta descriptions, links, hreflang, canonicals, HTTP status, robots.txt, and mobile usability rather than keyword research.

Semrush

Keyword research is a core workflow with a large proprietary database and multiple dedicated tools.

Semrush cites its keyword database and lists Keyword Overview, Keyword Magic Tool, and Keyword Strategy Builder: https://www.semrush.com/kb/806-seo-toolkit

Google Lighthouse

No content creation, content optimization editor, briefs, or publishing execution.

Lighthouse can flag basic page issues, but it does not generate articles, edit copy, create briefs, score topical coverage, or operationalize content production.

Semrush

Content optimization is included in Pro+ and the platform documents briefs and draft scoring, but publishing is not core SEO-plan execution.

Pro+ includes content optimization; Semrush describes briefs and draft scoring: https://www.semrush.com/pricing/seo-ai-search/; https://www.semrush.com/kb/995-what-is-semrush

Google Lighthouse

Narrow page-level technical context only.

Lighthouse gathers deterministic audit data from a rendered page, but it does not gather business context, competitor context, internal company data, analytics, CMS, CRM, or custom workflow context.

Semrush

Competitor domains, traffic sources, top pages, keyword gaps, and backlink context are supported.

The official feature list describes domain strategy, traffic sources, top pages, keyword gaps, and backlinks: https://www.semrush.com/kb/995-what-is-semrush

Google Lighthouse

Very narrow AI-agent readiness signals, not AI-search visibility or citation work.

Current docs include experimental agentic browsing audits, but they evaluate machine interaction signals rather than AI answer-engine rankings, citations, prompts, or share of voice.

Semrush

Current plans track AI prompts, AI brand performance, sentiment, and visibility across major AI systems.

Pricing lists AI-search tracking and AI Visibility limits; the product page names ChatGPT, Gemini, and Perplexity: https://www.semrush.com/pricing/seo-ai-search/; https://www.semrush.com/kb/995-what-is-semrush

Google Lighthouse

Some experimental machine-readability checks, but no full GEO workflow.

Agentic browsing audits can check signals such as WebMCP, accessibility, stability, and llms.txt; Lighthouse still does not manage GEO content strategy, citation likelihood, or AI-search measurement.

Semrush

Multi-location and device tracking is explicitly available in Pro+.

Pro+ includes multi-location/device tracking: https://www.semrush.com/pricing/seo-ai-search/

Google Lighthouse

Useful page-level technical SEO and quality audits, but not a full site crawler.

Lighthouse audits individual pages for SEO, performance, accessibility, best practices, and related diagnostics. It lacks site-wide crawling, issue inventory management, log analysis, and prioritization workflows.

Semrush

Site Audit and on-page/technical SEO workflows are core SEO Toolkit capabilities.

The Toolkit lists Site Audit, On Page SEO Checker, and technical SEO auditing: https://www.semrush.com/kb/806-seo-toolkit

Google Lighthouse

No CMS publishing, approvals, or production workflow.

Lighthouse produces reports and JSON output; implementation and publishing happen in external code, CMS, ticketing, or deployment systems.

Semrush

Official pages support content optimization and describe content workflows, but do not establish a full native publishing workflow for the core product.

The core pricing page only explicitly lists content optimization at Pro+; the official product description discusses content workflows without establishing core CMS publishing: https://www.semrush.com/pricing/seo-ai-search/; https://www.semrush.com/kb/995-what-is-semrush

Google Lighthouse

Can support repeat technical checks through CLI, JSON, and Lighthouse CI.

The CLI, Node module, JSON output, and Lighthouse CI can automate audits and guard against regressions, but Lighthouse does not track rankings, organic visibility, content performance, or business outcomes.

Semrush

Daily keyword rank tracking, AI visibility reporting, sentiment monitoring, and SEO Share of Voice are supported.

SEO, Pro+, and Advanced plan features include Position Tracking, AI reports, sentiment, and Share of Voice: https://www.semrush.com/pricing/seo-ai-search/

Google Lighthouse

Shareable reports exist, but no team workflow layer.

Reports can be saved, viewed, shared, or used in CI, but Lighthouse does not provide seats, roles, approvals, tasks, client portals, or agency reporting workflows.

Semrush

Team/agency positioning and additional-user support exist, but advanced collaboration is primarily enterprise-oriented.

Semrush describes plans for teams/agencies and additional-user pricing, while enterprise adds team governance: https://www.semrush.com/kb/1011-subscriptions

Google Lighthouse

Excellent access because the core utility is free, open source, and built into common web workflows.

Official docs show Lighthouse can run in Chrome DevTools, CLI, Node, PageSpeed Insights, the Chrome extension, and Lighthouse CI without a paid Lighthouse plan.

Semrush

A free tier and trials make evaluation accessible, but paid plans start at a high monthly price.

Free is $0 and seven-day trials are documented; SEO is $139 monthly: https://www.semrush.com/pricing/seo-ai-search/; https://www.semrush.com/kb/1011-subscriptions

Google Lighthouse

Strong free utility value for page audits and regression checks.

The public tooling path is free and useful before any paid SEO stack: DevTools, CLI, Node, PageSpeed Insights, report export, and Lighthouse CI.

Semrush

A limited free account exists with one demo project and daily report limits.

The official pricing page states the Free plan limits: https://www.semrush.com/pricing/seo-ai-search/

Google Lighthouse

No public customer or user count is scored for Lighthouse itself.

The reviewed official sources document distribution paths and open-source status, but do not publish a durable Lighthouse customer or user count suitable for this market-proof criterion.

Semrush

Official company materials provide meaningful adoption figures, though the clearest paying-customer figure is from 2023.

Company timeline reports 100,000 paying customers and 1,000,000 free registered active users in 2023: https://www.semrush.com/company/

Google Lighthouse

Useful as an automated audit input, but not an autonomous SEO agent workflow.

Lighthouse can run programmatically and now includes experimental agentic browsing audits, yet it does not plan, execute, remember, or evaluate SEO work as an agent.

Semrush

MCP access and API data integration provide machine-access paths, but the evidence does not establish a broadly autonomous SEO agent.

Starter includes MCP access and Advanced includes API data integration: https://www.semrush.com/pricing/seo-ai-search/

Google Lighthouse

Easy to run and automate for audits, but outcomes still require expert interpretation and external implementation.

DevTools and PageSpeed are low-friction, while CLI and CI automation are straightforward for technical teams; fixes, prioritization, and publishing remain manual or external.

Semrush

AI-powered recommendations and AI visibility features assist workflows, but human execution remains necessary.

Semrush describes AI-powered recommendations and AI visibility features, while the SEO Toolkit presents actionable insights rather than autonomous execution: https://www.semrush.com/kb/1011-subscriptions; https://www.semrush.com/kb/806-seo-toolkit