10 Best SEO Audit Tools [2026]: Site Audit Tools Compared

Short answer: Semrush Site Audit is the most popular all-round SEO audit tool. SEO Runway is the best choice if you want issues ranked by impact, page-level fixes and a written AI action plan your team or client can follow. Screaming Frog remains the essential desktop crawler for hands-on technical SEOs.

Disclosure: SEO Runway is our product. We ranked it using the same criteria as every other tool, and noted where others do better.

Quick picks

• Most popular all-rounder: Semrush Site Audit
• Best prioritised action plan: SEO Runway
• Best for technical SEOs: Screaming Frog
• Best visual explanations: Sitebulb
• Best for enterprise: Lumar

SEO audit tools compared

*Approximate; verify.

How we chose these tools

We compared each tool's published features, plans and documentation on seven criteria: issue coverage, prioritisation by impact, fix guidance, scheduled re-crawls and alerts, crawl limits, AI action plans, and report export.

1. Semrush Site Audit: most popular all-rounder

Verdict: broad checks, a health score, thematic reports and scheduling, inside the Semrush suite.

Pros: coverage; clear reports; integration.

Cons: page limits per plan; cost.

2. SEO Runway: best prioritised action plan

Verdict: a cloud crawler with a health score that ranks issues by impact, shows page-level fixes and writes a plain-English Gemini action plan, next to your rankings and Search Console data.

Key features: crawler with health score; issues ranked by impact with page-level fixes; scheduled re-crawls; a written AI action plan; an AI-readiness audit (AI-crawler access, llms.txt); white-label reports.

Pricing: Core SEO from $49/month; 14-day free trial. See plans.

Pros: tells you what to fix first; easy for non-specialists; AI readiness included.

Cons: no log-file analysis or enterprise-scale JavaScript crawling; fewer custom extraction options than Screaming Frog.

3. Screaming Frog: best for technical SEOs

Verdict: the industry-standard desktop crawler, with deep configuration.

Pros: depth; custom extraction; JS rendering; great value.

Cons: a steep learning curve; runs on your machine.

4. Ahrefs Site Audit: best for Ahrefs users

Verdict: fast cloud audits with strong internal link and indexability insights.

Pros: integrated data.

Cons: usage limits by plan.

5. Sitebulb: best visual explanations

Verdict: explains every issue clearly with prioritised hints and visual reports.

Pros: education; client-friendly reports.

Cons: the desktop version needs a powerful machine.

6. SE Ranking: best value audit

Verdict: a solid scheduled audit inside an affordable suite.

Pros: value.

Cons: less depth than specialists.

7. Moz Pro: best for Moz users

Verdict: a weekly Site Crawl with clear issue categories.

Pros: simple.

Cons: crawl limits.

8. Seobility: best free tier

Verdict: a generous free crawl and clear on-page checks.

Pros: free start.

Cons: limited at scale.

9. Sitechecker: best for monitoring

Verdict: site monitoring with change alerts.

Pros: alerts.

Cons: fewer advanced checks.

10. Lumar: best for enterprise

Verdict: enterprise technical SEO platform for very large sites.

Pros: scale; automation.

Cons: enterprise pricing.

What a good audit checks: 30 points

1. Pages return 200 (not 4xx/5xx)
2. No redirect chains or loops
3. HTTPS everywhere, no mixed content
4. robots.txt doesn't block important pages
5. XML sitemap exists, is submitted and is clean
6. Important pages are indexable (no stray noindex)
7. Canonical tags point to the right URLs
8. No duplicate titles
9. No missing or overlong titles
10. Meta descriptions present and unique
11. One H1 per page
12. Logical heading structure
13. No thin pages
14. No duplicate content
15. Images have alt text
16. Images are compressed and sized
17. Broken internal links fixed
18. Broken external links fixed
19. No orphan pages
20. Important pages within 3 clicks of home
21. Pages load quickly
22. Mobile-friendly layout
23. Structured data is valid
24. hreflang is correct (multi-language sites)
25. Pagination is handled
26. URL structure is clean
27. No soft 404s
28. AI crawlers are allowed where wanted
29. Internal anchor text is descriptive
30. Search Console has no coverage or manual-action issues

From audit to fixed: a workflow

1. Crawl and note the baseline health score.
2. Triage: indexing and broken pages first, then on-page, then nice-to-haves.
3. Turn issues into tasks with an owner and a due date.
4. Fix in batches by template (one change can fix hundreds of pages).
5. Re-crawl to confirm, and watch Search Console for changes.

How often to audit

Run a full crawl monthly for most sites and weekly for large or frequently changing ones. Run one immediately after a redesign, migration or CMS update. Scheduled crawls with alerts catch problems before rankings drop.

More audit guides

• Technical SEO tools and crawlers
• White-label SEO audit tools for agencies
• Free SEO audit tools
• Content optimization tools
• SEO dashboard tools

Frequently asked questions

How often should I run an SEO audit?

Monthly for most sites, weekly for large or frequently updated sites, and always after a migration or redesign.

What is a good site health score?

Above 90% is strong, and 70–90% means there's work to do. More important than the score is whether high-impact issues, such as indexing problems and broken pages, are fixed.

Can an audit tool fix issues automatically?

Most can't change your site directly. They tell you what to fix and how. Some tools automate on-page changes, but every automated change should be reviewed.

What's the difference between an SEO audit and a technical audit?

A technical audit covers crawling, indexing, speed and structure. A full SEO audit adds on-page content, keywords, links and competitors.

Do I need a paid audit tool?

Small sites can start with free tools (see our free audit tools). Paid tools add scheduling, larger crawls, prioritisation and reports.

The bottom line

• All-round audits in a research suite: Semrush.
• Teams wanting a prioritised plan they can act on: SEO Runway.
• Technical SEOs: Screaming Frog or Sitebulb.
• Enterprise sites: Lumar.

Start a 14-day free trial of SEO Runway and get your first AI action plan, or see the SEO workspace.