The best SEO audit tools in 2026 compared
SEO audits aren't what they were three years ago. Core Web Vitals are a ranking factor, search results are increasingly shaped by AI answers and AI Overviews, and more audits land in front of people who aren't technical SEOs.
Methodology — how we scored
Audit types
Does the tool cover only technical crawling, or also on-page, structure, content, performance and backlinks?
Crawl limits & scalability
How many URLs per audit — enough for a small site or an e-commerce store with hundreds of thousands of pages?
Usability
Built for technical pros, for beginners — or both?
Finding prioritisation
An endless issue list, or does the tool tell you what matters first?
Data quality
Own estimates, or real data from Google Analytics, Search Console and friends?
Price & reporting
Entry price, and how well can results be passed on to clients or stakeholders (e.g. as a branded report)?
SEO audit tools compared
Semrush Site Audit
The site-audit module inside Semrush, an all-in-one SEO platform. It crawls sites for technical and on-page issues and sits alongside keyword research, rank tracking, competitive research and content tools.
Best for
Agencies and in-house teams who want a full SEO command centre, not just an audit — and have the budget for it.
Pricing
Paid plans and allowances vary by plan and billing term; check Semrush's current pricing page.
Core features
Thematic crawling with a site-health score, Core Web Vitals checks, historical comparison, GSC and GA4 integrations, keyword and backlink research, and reporting options that vary by plan.
Pros
- Broad toolset beyond site auditing
- Established keyword and backlink research products
- Can suit agencies managing multiple SEO workflows
Cons
- Expensive and oversized for pure audit needs
- Steep learning curve, many unused modules
- Add-ons and extra seats add up quickly
Ahrefs Site Audit
The crawl and audit module of the other big suite. Ahrefs is best known for its backlink index but has grown into a full SEO platform with a solid technical audit.
Best for
Teams whose SEO work leans heavily on backlinks and competitive research and who want a reliable technical audit alongside.
Pricing
Plan prices, credits and included limits change; check Ahrefs' current pricing page. Ahrefs also offers Webmaster Tools for verified sites.
Core features
Prioritised audit, JavaScript crawling, performance and structure checks, backlink research and Keywords Explorer. Ahrefs Webmaster Tools are available for verified domains.
Pros
- Backlink research is a core part of the platform
- Clean, focused interface
- Free Webmaster Tools for your own domain
Cons
- Audit is good, but not the tool's primary focus
- Credit and limit system can throttle cheaper tiers
- No true free trial of the full product
SE Ranking
A budget-conscious all-in-one platform with rank tracking, site audit, keyword research, backlink analysis — and native white-label reporting for agencies.
Best for
Small to mid-sized agencies that want a full suite plus branded reports without Semrush or Ahrefs budgets.
Pricing
Plans, audit allowances, trials and Agency Pack options vary; check SE Ranking's current pricing page.
Core features
Website Audit, rank tracking, keyword research and backlink analysis, with integrations and white-label options that vary by plan.
Pros
- A full-suite option with agency-oriented features
- White-label natively integrated
- Generous project and crawl limits
Cons
- White-label costs extra (Agency Pack)
- Backlink data less fresh than Ahrefs
- Keyword limits multiply per search engine — exhaust faster than the headline suggests
Moz Pro
One of the oldest SEO platforms, famous for the industry-standard Domain Authority metric. Site Crawl delivers automatic weekly technical audits.
Best for
Beginners, small teams and budget-conscious website owners who want professional tools without the complexity of the market leaders.
Pricing
Moz Pro plans, crawl allowances and trial availability vary; check Moz's current pricing page.
Core features
Weekly Site Crawl with findings sorted by severity, Keyword Explorer with priority score, Link Explorer with Domain Authority and Spam Score, free MozBar browser extension.
Pros
- Lower-cost plans than some enterprise-oriented suites
- Clear prioritisation for site-crawl findings
- Domain Authority is a widely recognised Moz metric
Cons
- Audit less deep than Ahrefs/Semrush on large sites
- Smaller keyword and backlink database
- Crawl credits can throttle speed
Seobility
A Germany-built all-in-one SEO tool focused on technical audits. It crawls sites for technical, metadata, structure and content issues.
Best for
Beginners, small sites and budget-conscious freelancers, especially in DACH, who want a clear technical audit and a free-plan option.
Pricing
Seobility offers free and paid plans; project, crawl and reporting allowances vary by plan. Check its current pricing page.
Core features
Website audit with prioritised findings, rank tracking, backlink monitoring and a TF*IDF content tool. Reporting options vary by plan.
Pros
- Free-plan option alongside paid plans
- Clear, educational explanations for every finding
- TF*IDF content tool as a real differentiator; EU vendor
Cons
- Smaller data and backlink depth than the big suites
- Free-plan crawl allowances may be too tight for larger sites
- Few integrations (no Looker Studio), occasional false positives
AuditLumo
An audit-focused tool that analyses your site with real Google data instead of estimates, tracks your AI visibility in ChatGPT, Claude, Perplexity and Gemini, and packages everything into branded reports.
Best for
Agencies selling audits as a white-label service in their own brand, and website owners who want real performance data and AEO tracking over generic scores.
Pricing
A free starting option is available; check AuditLumo's current pricing page for plan features and allowances.
Core features
White-label reports in your agency's design, real GA4/GSC/Ads data in every audit, AEO tracking (mention rate, sentiment and competitor comparison across ChatGPT, Claude, Perplexity & Gemini) in every plan, AI with audit context, native MCP server for Claude & Cursor, Technical / Structure / Content score model with week-over-week comparison, GDPR-compliant on EU servers.
Pros
- Real Google data plus AEO tracking in every audit
- White-label built natively for agency reporting
- AI with audit context, MCP server for Claude & Cursor, EU hosting
Cons
- Younger tool without the multi-year data history of Semrush or Ahrefs
- No huge in-house keyword or backlink index like the big suites
- Focus on audit, AEO and reporting, not the full all-in-one SEO spectrum
Screaming Frog SEO Spider
The classic desktop crawler for technical SEOs. Runs locally on your machine and digs deep into a site's technical structure.
Best for
Technical SEOs and agencies who want full control over crawl configuration and raw data.
Pricing
A free version and paid annual licence are available; check Screaming Frog's current pricing page for current limits and licence terms.
Core features
Finds broken links, redirect chains, title/meta issues, duplicate content, missing alt text; JavaScript rendering, custom extraction (XPath), structured-data validation, GA/GSC/PageSpeed integration.
Pros
- Local crawling with detailed configuration options
- Full control, extremely detailed raw data
- A free version is available for smaller crawls
Cons
- Desktop software — crawl speed depends on your hardware
- No client-ready reports out of the box
- Steep learning curve; no keyword or backlink research
Sitebulb
An audit tool that turns crawl data into visual, well-explained reports and offers desktop and cloud products.
Best for
Consultants and agencies who want visual, accessible audit reports that non-technical clients also understand.
Pricing
Desktop and cloud subscriptions are available; check Sitebulb's current pricing page for current plans, billing terms and limits.
Core features
Prioritised hints with explanations, visual crawl maps, accessibility checks, JavaScript rendering, reporting options and GA/GSC integration.
Pros
- Plain-language, prioritised explanations
- Visual reports that clients grasp immediately
- Desktop and cloud option in one
Cons
- No permanent free tier
- Desktop crawls on large sites are resource-intensive
- Cloud version relatively expensive
Google Search Console
Google's own free tool. Shows how Google actually sees, indexes and treats your site in search results.
Best for
Website owners and teams who need Google Search performance and indexing data for a verified property.
Pricing
Completely free.
Core features
Real click, impression and position data, index coverage, Core Web Vitals report, manual actions, sitemap submission, URL inspection.
Pros
- Data straight from Google — no estimates
- Free and available for every website
- Useful source data for index and performance diagnosis
Cons
- No classic audit with a prioritised issue list
- Only your own verified site
- Raw data — interpretation and reporting are on you
Google Lighthouse / PageSpeed Insights
Google's free performance audit. Lighthouse runs inside Chrome, PageSpeed Insights as a web tool — both rate performance, accessibility, best practices and SEO basics.
Best for
Anyone checking Core Web Vitals and load time for a single page — developers and beginners alike.
Pricing
Completely free.
Core features
Core Web Vitals measurement (lab and field data), performance score, concrete optimisation hints, accessibility and best-practice checks.
Pros
- Google-provided performance and Core Web Vitals diagnostics
- Free, no sign-up
- Concrete, actionable hints per page
Cons
- Checks a single URL at a time, not the whole site
- No crawling, no structure or content audit
- Scores fluctuate with measurement conditions
Continue planning your audit
SEO audit guide
Learn what a complete SEO audit should cover.
Technical SEO audit checklist
Use a practical checklist for technical review.
Choosing SEO audit software
Match audit software to your workflow and team.
SEO audit report guide
Turn findings into a clear stakeholder report.
SEOptimer alternative
Compare another audit and reporting option.
Official product and documentation sources
Authoritative external sources and further references.
- Semrush Site Audit
Site Audit checks and workflow overview.
- Ahrefs Site Audit
Site Audit overview and crawl capabilities.
- SE Ranking Website Audit
Website Audit checks and product overview.
- Moz Pro Site Crawl
Site Crawl product overview.
- Seobility Website Audit
Technical audit product overview.
- Screaming Frog SEO Spider
Crawler features and integrations.
- Sitebulb features
Audit hints, reports and crawl features.
- Google Search Console
Google's overview of Search Console.
- PageSpeed Insights documentation
Explanation of PageSpeed Insights data and reports.
Agency-ready white-label SEO audits with real Google data.
Start your free auditComparison table
| Tool | Type | Audit focus | Entry price | Best for |
|---|---|---|---|---|
| Semrush | All-in-one suite | Technical + on-page | See current pricing | Data-driven agencies with budget |
| Ahrefs | All-in-one suite | Technical + backlinks | See current pricing | Backlink-driven teams |
| SE Ranking | All-in-one suite | Technical + on-page | See current pricing | Budget-conscious agencies |
| Moz Pro | All-in-one suite | Technical | See current pricing | Beginners, small teams |
| Seobility | All-in-one (audit-focused) | Tech & Meta / Structure / Content | Free and paid plans | Beginners & DACH budgets |
| AuditLumo | Audit + reporting | Technical / Structure / Content | See current pricing | Agencies (white-label) |
| Screaming Frog | Desktop crawler | Technical (deep) | Free and paid licence | Technical SEOs |
| Sitebulb | Desktop + cloud crawler | Technical + accessibility | See current pricing | Visual, explanatory audits |
| Google Search Console | Free Google tool | Index + performance | Free | Every site (mandatory) |
| Lighthouse / PSI | Free Google tool | Performance / CWV | Free | Performance checks |
FAQ
About this comparison
AuditLumo provides SEO audits and white-label reports for agencies and website owners.
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