How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- Screaming Frog is still the deepest crawl per dollar: free to 500 URLs, then 279 dollars per user per year with no page cap.
- Sitebulb is the friendlier crawler, turning the same raw crawl into prioritised hints and reports clients can read.
- Ahrefs and Semrush bundle audits into full SEO suites; buy them for keywords and backlinks, not for the audit alone.
- Google Search Console is free and is the ground truth every paid audit should be checked against.
- No audit tool improves rankings by itself. It produces a fix list; the fixes, and the content behind them, do the work.
Quick comparison
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We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Starting price$279 per user per year
Free planYes
Screaming Frog is the professional standard for one reason: control. It crawls what you tell it, renders JavaScript, extracts custom data with XPath or regex, connects Search Console and Analytics figures to crawl rows, and exports everything. A technical SEO can answer almost any site question with it.
The free version is a real product, not a demo: 500 URLs is a whole small business site. The licence at 279 dollars per user per year (199 pounds) removes the cap, and volume discounts apply from five seats. For a freelancer or an in house SEO, it is the cheapest serious audit capability in this list by a wide margin.
The trade is interpretation. Screaming Frog tells you everything and prioritises nothing. Newer users drown in tabs; Sitebulb below exists precisely to fix that. Buy the Frog when you know what you are looking for, or are ready to learn.
What we like- Free version crawls 500 URLs, which covers a full audit of a small site, paid licence has no crawl cap beyond your machine's memory and storage, deepest configuration of any crawler here, with custom extraction and JavaScript rendering, integrates with Search Console and Analytics data on the licence
Watch out for- The interface is a dense spreadsheet that beginners find forbidding, findings arrive uninterpreted
- Prioritising them is your job, desktop bound, so scheduled monitoring of many sites is awkward, support and learning come from documentation and community rather than hand holding
#2Sitebulb
Best for: Guided audits with readable reports4.5/5 on
G2 (13 reviews, checked Oct 2026)
Visit sitebulb.com
Starting price$18 per month
Free planNo
Sitebulb crawls like Screaming Frog and reports like a consultant. Every issue becomes a hint with a priority score and an explanation written for humans, and the visual crawl maps make site structure obvious in client meetings. Agencies that sell audits as a deliverable buy it for exactly that.
The Desktop Lite plan at 18 dollars a month covers 10,000 URLs per audit, enough for most small and mid size sites. Pro at 42 dollars a month raises the ceiling to 500,000 URLs and adds the full hint set and scheduling. A cloud version exists for teams that want audits running without a local machine.
Choose Sitebulb when the audit's audience is not you. If the report goes to a client, a manager or a development team that needs persuasion, its presentation saves hours of translation after every crawl.
What we like- Findings are presented as prioritised hints with plain explanations of why each issue matters, visual site maps and reports that clients and managers can actually read, Lite crawls 10,000 URLs per audit and Pro up to 500,000, raisable further, cloud version available for scheduled audits
Watch out for- No permanent free plan, only a trial, per user pricing means agency seats add up, the friendliest reporting still needs an SEO to decide what to fix first, very custom extraction work is less flexible than Screaming Frog
Starting price$29 per month
Free planYes
Ahrefs Site Audit is the sensible default for anyone already paying for Ahrefs, and its free route is the best in this list: verify your site in Ahrefs Webmaster Tools and you get scheduled audits and a backlink overview at no cost. For a site owner, that free tier is the correct starting point before any purchase.
Inside the paid suite, audits run in the cloud on a schedule, produce a health score, and group issues by severity. The value is context: the orphaned page report matters more when you can see in the same tool that the page carries backlinks worth saving.
The Starter plan at 29 dollars a month is a light entry; serious crawl volume lives in the standard tiers around 129 dollars and up. Buy Ahrefs for the whole suite. If audits are literally all you need, Screaming Frog or Sitebulb do the job for less.
What we like- Ahrefs Webmaster Tools runs Site Audit free on sites you verify, health score and issue reports are clear and scheduled automatically, audit data sits beside the backlink and keyword data Ahrefs is known for, Starter plan at 29 dollars a month is a cheap way into the suite
Watch out for- Paid tiers gate crawl credits, so large sites push you up the price ladder, audit depth is good rather than specialist
- The Frog outcrawls it, API access is tiered, the suite price is wasted if you only ever open the audit
Starting price$139 per month
Free planYes
Semrush Site Audit is the cloud audit most agencies already own. It schedules crawls, scores site health, and sorts issues into themes like crawlability, HTTPS, internal linking and site performance, so a team can assign a theme each and work in parallel. On the SEO plan at 139 dollars a month it covers 100,000 pages a month with 20,000 per audit.
The free account is a fair test: one project and up to 100 pages a month. Small sites can genuinely run on it for monitoring basics, though a full audit of anything bigger needs the paid tiers or a desktop crawler beside it.
As with Ahrefs, the buying logic is the suite. Semrush earns 139 dollars when you also use its keyword, content and competitor tools. For audit alone, it is the expensive way to buy a crawl.
What we like- More than 140 checks grouped into thematic reports a team can divide up, free account audits up to 100 pages a month, which suits a first look, the SEO plan covers 100,000 pages a month across projects, sits inside a broad suite covering keywords, content and competitors
Watch out for- 139 dollars a month is suite money for an audit feature, per audit and monthly page caps mean very large sites need higher tiers, depth on any single technical question trails a desktop crawler, the breadth of the suite can bury the audit workflow for new users
#5SE Ranking
Best for: Audit plus rank tracking in one plan4.7/5 on
G2 (1,606 reviews, checked Oct 2026)
Visit seranking.com
Starting price$129 per month
Free planNo
SE Ranking is the suite agencies pick when Semrush money is hard to justify but a cloud platform is still the requirement. Its audit is thorough, scheduled and integrated with the rank tracking and reporting that agency clients actually see, and the API is available without climbing to an enterprise tier.
Current Core pricing at 129 dollars a month includes a quarter of a million audit pages a month, which is generous next to rivals at the same money. The white label Agency Pack is an add on, so price the reporting you will actually send to clients into the comparison.
SE Ranking will not out analyse Screaming Frog on a gnarly technical problem. It wins on workflow: one login where audits, rankings and client reports live together, at a mid market price.
What we like- Website audit runs to 250,000 pages a month on the Core plan across 10 projects, audit, rank tracking, backlink and competitor tools share one subscription, API access is included across plans, which suits automated reporting, white label reporting available for agencies
Watch out for- Core at 129 dollars a month is the real entry for serious audit volume, no free plan, trial only, audit specialisation is shallower than the desktop crawlers, plan structure has changed over time, so verify current allowances before buying
Starting priceFree
Free planYes
Search Console is not a crawler, and it belongs on this list anyway because it is the ground truth the crawlers approximate. It shows how Google itself sees your site: which pages are indexed and why others are not, how crawl budget is spent, and how real users experience page speed.
It is free, and for a site owner it is not optional. Verifying your site should happen before you spend a dollar on any tool above, because the paid tools' findings only matter where they match or explain what Search Console shows.
Its limits explain the paid market. Search Console will not crawl your internal link graph, find your orphaned pages, or hand you a prioritised work list. Use it as the judge; use a crawler as the investigator.
What we like- The only tool here with Google's actual index data: coverage, crawl stats and Core Web Vitals from real visits, completely free with no page limits, shows which queries and pages earn impressions and clicks, every paid audit should be reconciled against it
Watch out for- It is data, not an audit: no prioritised fix list or site wide link crawl, reports lag by days and sample some data, covers only your own verified sites, historical data is limited to about 16 months
#7Lumar
Best for: Enterprise sites with millions of pages4.6/5 on
G2 (101 reviews, checked Oct 2026)
Visit lumar.io
Starting priceSee website
Free planNo
Lumar, formerly Deepcrawl, is the enterprise end of this market. Retailers, publishers and travel platforms with millions of URLs use it to crawl on schedule, segment by site section, and alert when a release breaks something structural. At that scale, catching a template error before it reaches a million pages pays the contract.
Everything about it is enterprise shaped: quoted pricing, onboarding, integrations. There is no self serve tier to try quietly, which is why the price here is See website.
The honest advice for most readers is that Lumar is not for you, and knowing that saves a sales cycle. If your site is under a few hundred thousand pages, the tools above cover the work at a fraction of the commitment.
What we like- Built for multi million page sites with scheduled, segmented crawls, strong analytics and alerting when key metrics move, API first design suits integration into enterprise workflows, covers technical health across large, multi brand estates
Watch out for- Pricing is a custom enterprise quote, implementation and onboarding are projects, not signups, a mid size site gains nothing here that Sitebulb would not give it for 42 dollars, overkill is a real cost in attention as well as money
#8Oncrawl
Best for: Audit data combined with log file analysis4.5/5 on
G2 (22 reviews, checked Oct 2026)
Visit oncrawl.com
Starting priceSee website
Free planNo
Oncrawl's difference is the logs. A crawler tells you what your site contains; log files tell you what Googlebot actually visited, how often, and what it ignored. On a large site, that gap between the site you built and the site Google crawls is where the expensive problems hide, and Oncrawl is built to expose it.
It pairs that with a full crawl audit and a data led approach that technical teams can pipe into their own analysis tools. Publishers and large e-commerce sites are the natural buyers.
Like Lumar, it is quoted and enterprise aimed, hence See website for price. If your site is small enough that Googlebot visits everything daily, log analysis has little to tell you, and the desktop crawlers are the right purchase.
What we like- Combines crawl data with server log analysis, so you see how Googlebot actually spends its time on your site, strong data science angle, with crawl data available for your own analysis, suits large content sites where crawl budget is a real constraint, enterprise reporting and segmentation
Watch out for- Quoted enterprise pricing, log file analysis only pays off on large sites with real crawl budget questions, setup needs log access and technical help, smaller teams will use a fraction of its capability
How we chose
We shortlisted site audit tools a US reader can buy or use in October 2026, covering desktop crawlers, suite audits, cloud enterprise platforms and Google's free ground truth tool. We recorded prices from vendor pricing pages and comparisons that checked those pages in October 2026, marking Lumar and Oncrawl as See website because both sell by enterprise quote. We did not test any tool hands on; this guide rests on vendor material and published comparisons.
Match crawl scale to site scale first. Under 500 pages, Screaming Frog's free version plus Search Console is a complete stack at zero cost. Under 50,000 pages, a desktop crawler licence covers you. Past a few hundred thousand pages, or across many client sites, cloud scheduling earns its money.
Second, decide who reads the report. If it is you, raw data and depth win: Screaming Frog. If it is clients or developers who need persuading, presentation wins: Sitebulb or a suite dashboard. More audits fail at the reading stage than at the crawling stage.
Third, beware buying a suite for one feature. Ahrefs, Semrush and SE Ranking are good value when you use their keyword and backlink tools weekly. If you will only open the audit, a 279 dollar annual crawler licence beats a 139 dollar monthly suite on simple maths.
Finally, schedule the re-audit before you fix anything. An audit's value compounds when it runs on a rhythm and catches regressions after releases. One heroic audit followed by a year of silence is how sites rot quietly.
Frequently asked questions
What is the best free SEO site audit tool?
For your own site, Google Search Console plus Ahrefs Webmaster Tools costs nothing and covers scheduled audits and index data. For crawling any site, Screaming Frog's free version handles 500 URLs, which is a full audit for a small site.
Will fixing audit errors improve my rankings?
It removes obstacles, which is different. Fixing crawl and indexation faults lets Google reach and understand your content; rankings then depend on the content itself and your authority. Any tool or vendor promising rankings from an audit alone is overselling.
How often should I run a site audit?
Monthly for most sites, and after every significant release or migration. Large sites on cloud platforms often crawl weekly or continuously. The point is catching regressions while they are small.
What is the difference between a desktop crawler and a cloud audit?
A desktop crawler runs on your machine, crawls as deep as your hardware allows, and gives you raw data. A cloud audit runs on the vendor's servers on a schedule, caps pages by plan, and presents findings in dashboards. Depth versus convenience is the trade.
How many pages can these tools crawl?
Screaming Frog's paid licence has no set cap beyond your machine. Sitebulb Pro covers 500,000 URLs per audit. Semrush's SEO plan covers 100,000 pages a month, and enterprise tools like Lumar and Oncrawl are built for multi million page sites.
Sources we checked (0)
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.
Ahrefs Site Audit
Semrush Site Audit
Google Search Console