Best SEO Audit Tools in 2026: 13 Site Crawlers and Auditors Compared

By Camellia · Updated Oct 22, 2026

The best SEO audit tool depends on how big your site is and who runs the audit. Screaming Frog and Sitebulb suit hands-on specialists who want a desktop crawler, Semrush, Ahrefs, SE Ranking and Moz Pro bundle audits with rank tracking and backlinks, Lumar and JetOctopus handle very large sites in the cloud, and Google Search Console is the free source of truth you should open first. This guide compares 13 options on crawl limits, JavaScript rendering, scheduling and what a small team actually pays.

An SEO audit tool does two jobs. It crawls your site the way a search engine would and lists what's broken: dead links, redirect chains, duplicate titles, missing canonicals, blocked pages. Then it ranks those problems so you fix the ones that matter first. Tools differ most in where the crawl runs (your laptop or their servers), how many pages they will crawl, and whether they can run on a schedule and tell you when something regresses.

Each tool is judged on five things: crawl capacity, JavaScript rendering, scheduling and monitoring, how well it prioritizes issues, and cost at a realistic small-team setup. Prices come from each vendor's own pricing page and state the billing term. If you're still choosing the rest of your stack, the best SEO tools hub covers keywords, rank tracking, backlinks and traffic in one place.

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Key Facts

• Google's Core Web Vitals "good" thresholds are LCP within 2.5 seconds, INP under 200 milliseconds and CLS under 0.1, per Google Search Central.
• PageSpeed Insights reports field data from real Chrome users over the previous 28 days, and a page passes only when the 75th percentile of all three vitals is good, per Google's PageSpeed Insights documentation.
• Google Search Console is "a free service offered by Google," per Google's Search Console help.
• Screaming Frog's free version crawls up to 500 URLs, while the paid licence is listed at $279 per year, per its pricing page.
• Ahrefs Free includes 5,000 crawl credits per month per verified project, and credits are only spent on HTML pages returning status 200, per Ahrefs.

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Quick Comparison Table

Prices are US dollars unless marked, with the billing term stated. Where a vendor doesn't print a price, it says so.

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Desktop Crawlers vs Cloud Crawlers vs Suite Audits

Before comparing brands, decide which of three shapes you need. The shape drives cost and workflow more than any single feature.

Most small teams end up with two layers: a free search engine tool for ground truth, plus one paid crawler or suite for scheduled checks. Teams that audit once a quarter often do fine with a desktop licence. Teams that need a weekly regression alert across several sites are better served by a suite or cloud crawler.

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Sizing and Persona Table

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1. Screaming Frog SEO Spider: The Desktop Standard for Technical Audits

Screaming Frog is a desktop application that crawls a site from your own computer and returns every URL with its status code, titles, headings, canonicals, directives and more. It's the default pick of technical SEO specialists because you can configure almost everything and export raw data for spreadsheets or scripts.

Sizing fit: The free version is capped at 500 URLs, which covers a small brochure site. The paid licence removes the cap, though the practical maximum depends on the memory and storage you allocate. The crawl limit is not the only difference: scheduling, JavaScript rendering, saved crawls, crawl comparison, custom extraction and the Google Analytics, Search Console and PageSpeed integrations are paid-only on the vendor's feature comparison.

What it does best: Deep, flexible crawling and quick answers to precise questions: which pages return 404, where redirect chains start, which titles are duplicated. Because it runs locally, a one-off audit costs the licence and nothing else.

Honest limit: A desktop crawler is a tool for a person, not a team dashboard. There's no hosted history your colleagues can open, and a very large crawl will strain a laptop. Plan on exporting reports for stakeholders.

Pricing: $279 per licence per year. Volume tiers per licence per year: $265 for 5 to 9 licences, $249 for 10 to 19, $235 for 20 or more. Free version available. Source: Screaming Frog pricing.

Best for: Technical SEOs and developers who want maximum control for a low annual cost. Replacing it outright? See the Screaming Frog alternatives.

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2. Sitebulb: Prioritized Audits That Explain Themselves

Sitebulb comes in two forms: a desktop app for Windows and Mac, and a cloud product. Its pitch is that it doesn't just list problems, it explains them and ranks them, which makes it popular with consultants who have to hand a clear report to a client.

Sizing fit: Desktop Lite allows 10,000 URLs per audit for one user. Desktop Pro allows 500,000 URLs per audit, which the FAQ says can be raised to 2 million depending on your machine. Sitebulb Cloud has no listed project limits and starts at two users.

What it does best: Turning a pile of crawl data into a prioritized to-do list with explanations, so a non-specialist stakeholder can follow it.

Honest limit: The Lite cap of 10,000 URLs is tight for ecommerce sites, and Pro ($42 per month billed monthly for one user) adds cost for every extra seat. Cloud is a separate plan for teams that starts at $125 per month.

Pricing: Desktop Lite is $18 per month billed monthly or $180 per year billed yearly, for one user. Desktop Pro is $42 per month billed monthly or $425 per year billed yearly for one user, with extra users priced separately. Sitebulb Cloud, for teams of two or more, starts at $125 per month (Mini), with Small at $245 and Medium at $495; yearly billing carries no discount on Cloud. Details on the Sitebulb pricing page.

Best for: Consultants and in-house SEOs who report to non-technical stakeholders.

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3. Semrush Site Audit: The Audit Inside a Full Suite

Semrush's Site Audit sits inside its SEO plan alongside Position Tracking, keyword research and competitor analysis. The old Pro, Guru and Business plans are gone; the current lineup is SEO, Starter, Pro+ and Advanced.

Sizing fit: The SEO plan covers 5 websites to monitor and 500 keywords tracked daily. Pro+ raises that to 15 websites and 1,500 keywords, and Advanced is custom with 40 or more websites. Pages crawled per audit isn't printed on the plan cards.

What it does best: Keeping audit findings next to rankings and competitor data, so you can see whether a fix moved a position. The plans also add AI search features, which we don't cover here; see the best Semrush AI Toolkit alternatives for that intent.

Honest limit: Audit depth is a module, not a specialist crawler, and seats cost extra. One user is the baseline, with additional users from $45 per month.

Pricing: SEO plan $139 per month billed monthly, or $117.33 per month billed annually. Starter $199 monthly ($165.17 annually). Pro+ $299 monthly ($248.17 annually). Advanced is custom. Source: Semrush pricing.

Best for: Marketing teams that want audits, tracking and competitor research under one subscription.

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4. Ahrefs Site Audit: Free Crawling for Sites You Own

Ahrefs runs its audit through a credit system. The free tier, now called Ahrefs Free (formerly Webmaster Tools), lets you verify your own sites and crawl them at no charge.

Sizing fit: Ahrefs Free gives 5,000 crawl credits per month per verified project. Paid plans scale the allowance: Lite 100,000, Standard 500,000 and Advanced 1,500,000 crawl credits.

What it does best: A zero-cost technical health check for small sites, with a Health Score you can monitor over time, and paid plans that pair the audit with backlink and keyword data. Credits are only used when a crawl hits an HTML page returning status 200, so redirects and broken URLs don't eat your allowance.

Honest limit: Credits are a budget to manage, and the free page doesn't describe JavaScript rendering or scheduling options. Printed paid prices are monthly-billed only.

Pricing: Ahrefs Free is free. Paid plans, billed monthly: Lite $129 (750 tracked keywords, 5 non-verified projects), Standard $249 (2,000 keywords), Advanced $449 (5,000 keywords), Enterprise $1,499 with an annual commitment. A Starter plan is listed at $29 per month. Source: Ahrefs pricing. For the brand-monitoring side, see best Ahrefs Brand Radar alternatives.

Best for: Small site owners who want a free audit, and teams already living in Ahrefs.

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5. Lumar: Enterprise Cloud Crawling

Lumar is a cloud crawling platform aimed at large organizations that need to monitor technical health across big sites and multiple teams. The company built its name on large-scale crawling and governance.

Sizing fit: Large sites, often with hundreds of thousands to millions of pages, where one SEO can't manage the work alone and needs workflows, history and reporting.

What it does best: Handling scale and giving several teams a shared view. The buying process is built for enterprises, with a demo and a custom quote.

Honest limit: There is no published price, so you can't budget from a pricing page, and it's more tool than a small site needs. The pricing page offers a form for a quote and a demo, not a self-serve signup.

Pricing: Pricing on request. Source: Lumar pricing.

Best for: Enterprise SEO teams and large publishers or retailers.

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6. JetOctopus: Cloud Crawler With Log Analysis

JetOctopus pairs a cloud crawler with a log analyzer, so you can compare what Googlebot actually requested against what your crawl says exists. It lists a JavaScript rendering crawl mode and says all modules are included in every plan.

Sizing fit: Growth crawls 500K URLs per month with 2M log lines; Pro 2M URLs with 8M log lines; Ultra 5M URLs with 25M log lines. Unlimited is custom. The log line allowance on Pro and Ultra shows two figures depending on whether you're in-house or an agency.

What it does best: Large-site diagnosis where crawl budget and indexation are the problem. Seeing crawl and log data side by side is the use case.

Honest limit: It's priced for teams with serious sites. The page prints two price points per plan under an Annually and Quarterly toggle with a 25% saving, so confirm which applies to you at checkout.

Pricing: Growth $349 per month on the annual option ($459 on the quarterly option); Pro $809 annual option ($1,089 quarterly); Ultra $1,559 annual option ($2,069 quarterly). Unlimited is "let's talk." Source: JetOctopus pricing.

Best for: In-house SEO teams on large ecommerce or publishing sites.

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7. SE Ranking: Generous Page Audits for Small Agencies

SE Ranking's lineup is now Core, Growth and Enterprise; the older Essential, Pro and Business names are retired. Audits are part of every plan.

Sizing fit: Core covers 10 projects, 2,000 tracked keywords and 250,000 pages audited per month with one manager seat. Growth covers 30 projects, 5,000 keywords, 2 million pages audited per month and 3 manager seats. Extra seats start at $16.

What it does best: Pairing a high monthly audit allowance with rank tracking and project management at a price below the bigger suites. The 14-day trial needs no credit card.

Honest limit: The entry plan includes only one manager seat, so a three-person team adds seat cost. Printed prices show monthly and annual side by side, with annual 20% cheaper.

Pricing: Core $129 per month billed monthly, $103.20 per month billed annually. Growth $279 monthly, $223.20 annually. Enterprise on request. Source: SE Ranking pricing.

Best for: Small agencies and in-house teams running several smaller sites.

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8. Sitechecker: Scheduled Recrawls and Unlimited Users

Sitechecker is an audit-first platform with rank tracking and Search Console and GA4 insights. On every plan it offers unlimited users and unlimited recrawls.

Sizing fit: Basic covers 3 websites and 500 keywords, Standard 20 websites and 2,500 keywords, Premium 50 websites and 5,000 keywords. Auto-recrawl runs weekly on Basic, daily on Standard and every 12 hours on Premium and Enterprise.

What it does best: Frequent, automatic recrawls for teams that want to catch regressions quickly, without paying per seat.

Honest limit: The plan limits shown can vary by visitor, so the numbers above are the defaults.

Pricing: Basic $99 per month billed monthly ($83 per month billed annually). Standard $249 monthly ($208 annually). Premium $449 monthly ($375 annually). Enterprise custom. Source: Sitechecker plans.

Best for: Small teams that need many seats and scheduled monitoring.

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9. Seobility: A Free Plan That Never Expires

Seobility offers a free plan with no time limit, which makes it a handy first audit for a small site.

Sizing fit: Free covers 1 project, 100 pages per crawl and 10 tracked keywords. Premium covers 3 projects and 25,000 pages per crawl, Professional 7 projects and 50,000 pages, Agency 20 projects and 100,000 pages.

What it does best: Letting a small business audit its site at no cost and grow into a paid tier later.

Honest limit: A 100-page crawl is a sampler, not an audit, for any site beyond a brochure. Prices are in euros excluding VAT.

Pricing: Premium €59.90 per month (€575.04 per year), Professional €99.90 per month (€959.04 per year), Agency €209.90 per month (€2,015.04 per year), all excluding VAT. Source: Seobility pricing.

Best for: Small business owners wanting a free starting point.

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10. Moz Pro: Site Crawl With Moz's Teaching Layer

Moz Pro bundles a site crawl with keyword research, rank tracking and link tools. Plan names are now Starter, Standard, Medium and Large.

Sizing fit: Standard includes 1 user, 3 tracked sites, 300 tracked keywords and a 400K pages per month crawl allowance on the pricing card. Medium includes 2 users, 10 sites, 1,500 keywords and 2M pages. Large includes 3 users, 25 sites, 3,000 keywords and 5M pages.

What it does best: Combining a crawl with Moz's well-known education and metrics for teams that want guidance as well as data.

Honest limit: The entry tracks only 300 keywords, and additional seats are $49 per month on any plan. The pricing card and table express crawl limits differently (monthly versus weekly), so read both.

Pricing: Standard $99 per month billed monthly, $79 per month billed annually (first-year price). Medium $179 monthly, $143 annually. Large $299 monthly, $239 annually. Starter is listed at $49 per month. Source: Moz Pro pricing.

Best for: Teams that want one platform with a strong learning resource.

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11. Google Search Console: The Free Source of Truth

Search Console is Google's own report on how it crawls, indexes and serves your site. It's not a site crawler you run on demand, but its data is first-party, which no third-party tool can match.

Sizing fit: Every site, at every size.

What it does best: URL Inspection gives detailed crawl, index and serving information about individual pages, index coverage reports show whether Google has a fresh view of your site, and Core Web Vitals reports cover mobile and desktop.

Honest limit: It tells you what Google saw, not everything wrong with your site. Orphan pages, internal-link depth and duplicate-content patterns usually need a crawler.

Pricing: Free, per Google's Search Console help.

Best for: Everyone. Set it up before you buy anything else.

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12. Google PageSpeed Insights: Core Web Vitals Checks

PageSpeed Insights analyzes a single URL and reports both field data and lab data. Field data comes from the Chrome UX Report over the previous 28 days and covers FCP, INP, LCP and CLS. Lab data comes from Lighthouse, which scores Performance, Accessibility, Best Practices and SEO.

Sizing fit: Any site, one URL at a time.

What it does best: Telling you whether real users have a good experience and what specific changes would help. The Core Web Vitals "good" thresholds are LCP within 2.5 seconds, INP under 200 milliseconds and CLS under 0.1, with a pass requiring the 75th percentile of all three to be good.

Honest limit: It's a page-level tool. For site-wide patterns, pair it with a crawler or the Core Web Vitals report in Search Console. The API works with or without a key, though a key is recommended for frequent automated queries.

Pricing: Free to use. Sources: PageSpeed Insights docs and Google Search Central.

Best for: Developers and marketers checking speed on key templates.

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13. Bing Webmaster Tools: Site Scan and IndexNow

Bing Webmaster Tools is free and includes a Site Scan, an on-demand technical audit that flags issues like broken links, duplicate tags and missing metadata. It also supports URL submission and IndexNow, which lets you notify Bing and other participating engines about added, updated or deleted URLs.

Sizing fit: Any site that wants visibility in Bing and other IndexNow engines.

What it does best: Fast change notification through IndexNow, plus search performance data covering up to 16 months, backlink data and keyword research.

Honest limit: Site Scan is a lighter audit than a dedicated crawler, and the tool needs sign-up and site verification. Source: Microsoft's Bing Webmaster blog.

Pricing: Free.

Best for: Sites that want Bing coverage and fast URL updates at no cost.

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Technical Features Compared

A "not printed" entry doesn't mean the feature is missing. It means the vendor's pricing page doesn't state it, so ask before you rely on it. JavaScript rendering matters most if your site builds content in the browser; test your most script-heavy template in the trial before you commit.

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What a Realistic Small-Team Setup Costs

Entry prices mislead because seats, tracked keywords and projects change the total. This table prices a small team of three people working on a handful of sites with roughly 500 to 1,000 tracked keywords where the tool includes tracking. Figures are sums of printed list prices, billed monthly, in the vendor's currency.

Three patterns stand out. Sitechecker is the cheapest paid route to three seats with tracking because it doesn't charge per user. SE Ranking gives the most keywords and audited pages for the money, though seat prices are listed as "from." Screaming Frog is the cheapest per audit if your work is crawling rather than tracking, at about $23 per month per licence spread across the year. Annual billing lowers the monthly figures on most suites; where a vendor prints an annual rate, it's listed on each tool's section above.

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How to Choose: Decision Framework

If you also need keyword and traffic data, pair your audit tool with picks from the best keyword research tools, the best rank trackers and the best website traffic checkers. Teams on a tight budget should start with the best free SEO tools.

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Audit Workflow: What to Check and in What Order

A tool only helps if the audit follows a sequence. Start with indexation: confirm in Search Console that your important pages are indexed and that nothing valuable is excluded. Move to crawlability next, looking for blocked resources, redirect chains and broken internal links. Then check on-page basics such as titles, descriptions, headings and canonicals. Finish with performance, using PageSpeed Insights on your homepage, a category page and a typical article.

And keep a fixed cadence. A monthly audit for a small site, weekly for a site that ships changes often. The point of a scheduled tool is that regressions surface within days, not at the next quarterly review.

For a different intent, how AI answer engines treat your pages, see the best AI SEO tools, the best AEO tools and the explainer on AEO vs SEO.

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What to Do Next

Open Search Console first and read the index and Core Web Vitals reports for your site. Then pick one crawler from this list that matches your site size and run a trial audit on your most complex section. Fix the highest-impact issues, schedule a recurring crawl, and compare results at the next cycle. If the audit tool you choose doesn't also track rankings, add one of the best rank trackers so you can see whether fixes move positions.