The best SEO audit tools in 2027 are SEOSage for a full crawl with no page limit at the lowest price, Screaming Frog and Sitebulb for experienced technical SEOs, Semrush, Ahrefs, SE Ranking and Moz Pro if you also want keyword and backlink data in one place, Seobility for a small site on a budget, JetOctopus for very large sites, and Google Search Console, which is free and should sit next to any of them. Below is what each one costs a month and a year, how many pages it will audit, what its audit actually shows you, and who it suits.
TL;DR
- Cheapest full crawl: SEOSage, from $9 a month ($79 a year billed yearly), with no page limit.
- For technical SEOs: Screaming Frog ($279 a year, no monthly plan, free up to 500 URLs) and Sitebulb (from $18 a month).
- Audit plus keywords and backlinks: Moz Pro ($99 a month), Ahrefs or SE Ranking ($129 a month) or Semrush ($139 a month) on their first plan with a site audit, with pages capped by plan.
- Small site, low budget: Seobility (free plan up to 100 pages per crawl, Premium $69.90 a month).
- Very large sites: JetOctopus, $349 a month billed yearly. It has no monthly plan.
- Always: Google Search Console, free, because it shows what Google itself has indexed.
This guide is part of our series on how to do an SEO audit. Keep your findings in the free SEO audit template.
Three kinds of SEO audit tool #
- Desktop crawlers run on your own computer and read every page of a site, the way a search engine does. They are the cheapest way to audit a big site, because there is no monthly page allowance: the limit is your computer’s memory and disk. SEOSage, Screaming Frog and Sitebulb’s desktop version are in this group. They can also reach sites that are not public yet, such as a staging copy behind a login.
- All-in-one cloud suites run in the browser and include a site audit alongside keyword research, rank tracking and backlink data. The audit has a page allowance by plan, and it keeps running when your computer is off. Semrush, Ahrefs, SE Ranking, Moz Pro and Seobility are in this group.
- Enterprise crawlers are cloud crawlers built for sites with millions of pages, log files and teams. JetOctopus is in this group.
Pick the kind first. If you already pay for a cloud suite for keywords, its audit may be enough for a small site. If you only need the audit, a desktop crawler costs a fraction of the price.
What each SEO audit tool costs a month and a year #
Cheapest plan that includes a site audit, for one person, cheapest first. Checked on each tool’s own pricing page on 9 November 2026, in US dollars. G2 ratings are from G2 on 10 November 2026; how many reviews each is based on is under each tool below.
| Tool | G2 rating | Kind | Plan | Price a month | A year, billed monthly | Audit limit |
|---|---|---|---|---|---|---|
| SEOSage | 5.0 | Desktop | Solo | $9 (Pro $19, Team $39) | $108 ($79 billed yearly) | No page limit |
| Screaming Frog SEO Spider | 4.7 | Desktop | Licence | No monthly plan | $279 a year | 500 URLs free; no fixed limit when paid |
| Sitebulb Desktop | 4.5 | Desktop | Lite | $18 (Pro $42) | $216 ($180 billed yearly) | 10,000 URLs per audit (Pro: 500,000) |
| Seobility | 4.6 | Cloud | Premium | $69.90 | $838.80 ($671.04 billed yearly) | 25,000 pages per crawl (free plan: 100) |
| Moz Pro | 4.3 | Cloud | Standard | $99 ($79 billed yearly) | $1,188 | 400,000 pages a month |
| Ahrefs | 4.5 | Cloud | Lite | $129 | $1,548 ($1,290 billed yearly) | 100,000 crawl credits a month, 25,000 pages per project |
| SE Ranking | 4.8 | Cloud | Core | $129 ($103.20 billed yearly) | $1,548 | 250,000 pages a month |
| Semrush | 4.4 | Cloud | SEO | $139 ($117.33 billed yearly) | $1,668 | 20,000 pages per audit, 100,000 a month |
| JetOctopus | 4.5 | Enterprise | Growth | No monthly plan | $4,188 billed yearly ($459 a month billed quarterly) | 500,000 URLs a month |
| Google Search Console | 4.7 | Free | $0 | $0 | Sites you own or were given access to |
The gap is the point of this table: a full audit of every page costs from $79 a year on a desktop crawler, and about $1,200 to $1,700 a year (billed monthly) as part of one of the main cloud suites, where you also get keyword and backlink data.
What 8 client sites cost for a year #
Most people who compare audit tools are freelancers and small agencies, so here is a worked example. You look after 8 client websites, none of them bigger than 10,000 pages, and you pay yearly. This is the cheapest plan on each tool that covers all 8.
- SEOSage Pro, $149 a year. Pro covers 10 client projects on 2 computers, with no page limit.
- Sitebulb Lite, $180 a year. Lite audits up to 10,000 URLs at a time, which is enough here. Sitebulb’s pricing page does not state a project limit for its desktop plans.
- Screaming Frog, $279 a year. One licence, no project limit. The free version stops at 500 URLs, so it is too small for most client sites.
- SE Ranking Core, $1,238.40 a year. Core includes 10 projects and 250,000 audit pages a month.
- Ahrefs Lite, $1,290 a year, but only if you can verify each client’s site, because Lite allows 5 projects you have not verified.
- JetOctopus Growth, $4,188 a year. Unlimited projects, but built for far bigger sites than these.
Three of the cloud suites do not cover 8 sites on their first plan: Semrush’s SEO plan allows 5 sites, Moz Pro Standard 3 campaigns and Seobility Premium 3 projects (Professional has 7, and Agency, $2,303.04 a year, has 20). For 8 clients you would need a higher plan on each, so check those prices before you compare.
How we chose and compared them #
- We included tools whose main job, or one of whose main jobs, is a technical site audit, and that show up in the lists people read today.
- For each, we used the cheapest plan that includes a site audit, and read the price, page limit and project limit from the tool’s own pricing page on 9 November 2026. Feature details come from each tool’s own product pages and help pages.
- The G2 rating under each tool is the score and number of reviews on its G2 page on 10 November 2026. Look at the number of reviews as well as the score: a score from a few reviews says less than one from hundreds. For Semrush, Ahrefs, SE Ranking and Moz Pro the rating covers the whole product, not only its site audit.
- We judged each on what it is for, not on a score: who it suits, what its audit shows you, what it is good at, and where it falls short.
- Where we had access, the screenshots show each tool looking at the same small website, marketingly.org, so you can compare what each screen tells you. For Semrush, Sitebulb, SE Ranking, Seobility and JetOctopus, the picture is the tool’s own screen as shown on its website, and the caption says so.
- SEOSage is listed first because it is built for exactly this job: a full audit of every page at a low price. Its limits are listed like everyone else’s.
The 10 best SEO audit tools in 2027 #
1. SEOSage #
Best for: freelancers, agencies and site owners who want a full audit of every page, clear fixes and client reports, at the lowest price.
G2 rating: 5.0 out of 5 from 2 reviews. SEOSage is new on G2, so two reviews are a first look, not a verdict.
Price: Solo $9 a month or $79 a year (1 computer, up to 3 client projects), Pro $19 a month or $149 a year (2 computers, 10 client projects), Team $39 a month or $299 a year (5 computers, unlimited client projects). 14-day free trial, no card needed.
What the audit gives you: a health score, the pages it crawled, and a list of issues sorted by how much they matter, each with what it means and how to fix it. After you fix something, you re-check just that page and it shows Fixed, Still there or Needs re-crawl, so you do not have to crawl the whole site again.
Good at: SEOSage is a desktop app for Mac and Windows that crawls your whole site on your own computer, with no page limit and no monthly page allowance. It compares any two crawls to show what changed, checks robots.txt, sitemaps, hreflang, canonicals and orphan pages, runs a Core Web Vitals lab test on mobile and desktop, and connects to Google Search Console. The reports come out in PowerPoint, PDF, Excel and CSV with your own logo and colours, and you can ask Claude about a crawl in plain English.
Falls short: it has no keyword research or backlink data, so you will want a separate tool for those. Crawls run on your computer, so a very large site needs a computer that can stay on while it runs. It is a younger tool than most on this list.
See all features or pricing.
2. Screaming Frog SEO Spider #
Best for: technical SEOs who want the deepest, most configurable desktop crawler and do not mind a lot of settings.
G2 rating: 4.7 out of 5 from 84 reviews (listed on G2 as “SEO Spider”).
Price: free up to 500 URLs. A licence is $279 a year, with a lower price per licence from 5 licences. Licences are per user and last a year. There is no monthly plan.
What the audit gives you: a table of every URL it found, with tabs for titles, descriptions, headings, response codes, redirects, canonicals and more, and filters for each problem. You decide what to look at and export it.
Good at: one of the most widely used crawlers, with JavaScript rendering, custom extraction by CSS Path, XPath or regex, scheduled crawls, crawl comparison, site visualisations, and connections to Google Analytics, Search Console and PageSpeed Insights. It runs on Windows, Mac and Linux, can crawl a staging site from your own computer, and can now send pages to AI models from OpenAI, Google, Anthropic or Ollama.
Falls short: it shows data more than it explains it, so it suits people who already know what to look for. The free version leaves out JavaScript rendering, saving crawls and the integrations. The paid version’s crawl size depends on your computer’s memory and disk.
We compare the two in SEOSage vs Screaming Frog.
3. Sitebulb #
Best for: SEOs and agencies who want issues explained and ranked by priority, with visual reports, on desktop or in the cloud.
G2 rating: 4.5 out of 5 from 13 reviews.
Price: Desktop Lite $18 a month or $180 a year (10,000 URLs per audit), Pro $42 a month or $425 a year (500,000 URLs per audit, and up to 2 million on request), about 15% less billed yearly. Sitebulb Cloud starts at $125 a month. The 14-day trial gives you Pro, with no card.
What the audit gives you: “Hints”, each one a problem with an explanation and a priority, grouped by area, plus crawl maps and charts that show how pages link together.
Good at: clear explanations, JavaScript rendering on every plan, change history between audits, and Google Analytics and Search Console data next to the crawl. Pro adds structured data, hreflang, accessibility and spelling checks, audit comparisons, scheduled audits and customised PDF reports. It can crawl a staging site behind a login.
Falls short: Lite is cut down: 100+ Hints instead of Pro’s 300+, and no scheduling, comparisons or custom PDFs, and it stops at 10,000 URLs per audit. Extra users cost extra, and Cloud costs far more than Desktop.
4. Semrush Site Audit #
Best for: marketers who want keyword research, rank tracking, competitor data and an audit in one subscription.
G2 rating: 4.4 out of 5 from 4,303 reviews, for Semrush as a whole, not only Site Audit.
Price: the cheapest plan with Site Audit is now called SEO: $139 a month, or $117.33 a month billed yearly. It allows 5 sites to monitor, and extra users start at $45 a month. A free account can try a limited audit, and there is a 7-day trial.
What the audit gives you: a site health score and a list of errors, warnings and notices from more than 140 checks, now including a category for AI search, each with why it matters and how to fix it.
Good at: the audit sits in the same account as Semrush’s keyword, competitor and rank tracking tools, so one subscription covers most SEO work. You can schedule daily or weekly crawls, crawl from a sitemap or a list of URLs, crawl an in-development site with your login, and export to Excel, CSV or PDF.
Falls short: Semrush’s help pages put the audit at 20,000 pages per audit and 100,000 a month on this level, and JavaScript rendering needs a Guru or Business plan. It is expensive if the audit is all you need.
See SEOSage vs Semrush.
5. Ahrefs Site Audit #
Best for: teams that already use Ahrefs for backlinks and keywords.
G2 rating: 4.5 out of 5 from 723 reviews, for Ahrefs as a whole, not only Site Audit.
Price: Lite $129 a month, or $1,290 a year billed yearly. Lite includes 100,000 crawl credits a month, up to 25,000 pages per project, 5 projects you have not verified and any number you have. Ahrefs Free gives 5,000 crawl credits a month for each site you verify.
What the audit gives you: a health score and more than 170 issues, from broken links and redirects to slow pages, with the pages each one affects and how to fix it.
Good at: the audit sits next to Ahrefs’ backlink and keyword data, and Ahrefs says it runs the second most active web crawler. It runs JavaScript, can keep an “always-on” audit running without using credits, shows Core Web Vitals from Chrome users and Lighthouse, suggests internal links, and compares the raw and rendered HTML between crawls.
Falls short: Lite stops at 25,000 pages per project, so bigger sites need a higher plan. Ahrefs lists HTTP authentication, the usual way into a staging site, as an extra on its Advanced plan ($449 a month). It costs a lot for audit-only use.
6. SE Ranking Website Audit #
Best for: agencies and in-house teams that want an all-in-one suite with a large audit allowance for less than the biggest names.
G2 rating: 4.8 out of 5 from 1,490 reviews, for SE Ranking as a whole, not only Website Audit.
Price: Core $129 a month, or $103.20 a month billed yearly (20% less). It includes 250,000 audit pages a month, 10 projects and 1 user (more users from $16 a month). There is no free plan, but there is a 14-day trial with no card. White label is the Agency Pack, an extra $69 a month on yearly billing only.
What the audit gives you: more than 115 checks with a health score, grouped by type, with the affected pages for each and a comparison with your earlier audits.
Good at: audit, rank tracking and reporting in one place, with JavaScript rendering, weekly or monthly scheduled audits, Core Web Vitals and a generous monthly page allowance for the price.
Falls short: the 250,000 pages are a monthly allowance for the whole account, not unlimited, and white label reports cost extra and need a yearly plan. Its own audit page still mentions an older plan with a smaller limit, so read the pricing page.
7. Moz Pro Site Crawl #
Best for: small businesses that want a well-known all-round SEO suite with a basic weekly crawl.
G2 rating: 4.3 out of 5 from 608 reviews, for Moz Pro as a whole, not only Site Crawl.
Price: Standard $99 a month, or $79 a month billed yearly ($950 for the first year). It includes 400,000 pages crawled a month, 3 campaigns and 1 user (extra users $49 a month). A $49 a month Starter plan is for a single website; Moz’s pricing page does not say whether it includes Site Crawl.
What the audit gives you: a weekly crawl of each campaign with alerts for new and critical issues, each explained with its impact and the fix, plus trend charts of issues over time.
Good at: one suite with keyword, link and crawl data, Moz’s own Domain Authority and Page Authority scores, and simple ways to mark an issue as fixed or ignored and re-crawl to check.
Falls short: the crawl runs weekly, and Standard includes 5 on-demand crawls but no site re-crawls. Its 3 campaigns are few for an agency, and you pay for keyword and link tools you may not need.
See SEOSage vs Moz.
8. Seobility #
Best for: small sites and people who want a free plan to start.
G2 rating: 4.6 out of 5 from 409 reviews.
Price: a free plan for one site with a limited audit of up to 100 pages per crawl. Premium is $69.90 a month, or $671.04 a year (20% less), with 25,000 pages per crawl and 3 projects. Seobility says customers in Germany pay VAT on top, and customers outside the EU do not. Every paid plan has a 14-day trial.
What the audit gives you: more than 300 checks per page, each tagged by how serious it is, with the pages it affects.
Good at: an easy cloud audit with rank and backlink monitoring, optional JavaScript crawling, scheduled re-crawls, CSV and PDF exports, a check of which pages are blocked for AI bots, and crawling of password-protected sites on paid plans. The free plan stays free.
Falls short: the free plan’s 100 pages is too small for most sites. Premium is for one user and has no white label PDFs; both start on Professional ($109.90 a month, 50,000 pages, 7 projects).
See SEOSage vs Seobility.
9. JetOctopus #
Best for: very large sites, such as big online shops and publishers, that need log file analysis next to the crawl.
G2 rating: 4.5 out of 5 from 21 reviews.
Price: there is no monthly plan. Growth is $349 a month billed yearly (about $4,188 a year), or $459 a month billed quarterly, with 500,000 crawled URLs a month, 2 million log lines, and unlimited projects and users. The trial opens after a demo.
What the audit gives you: a cloud crawl you can cut into segments, compared with earlier crawls, next to what Googlebot and AI bots actually visit in your server logs.
Good at: crawling at scale with JavaScript rendering, log analysis that shows the pages Google does and does not visit, Search Console and GA4 data in the same place, and alerts for Core Web Vitals and Googlebot changes.
Falls short: the price and the quarterly or yearly commitment are far above what a small or mid-size site needs, and you have to book a demo before you can try it.
10. Google Search Console (free) #
Best for: everyone, next to any tool above.
G2 rating: 4.7 out of 5 from 517 reviews.
Price: free, with a Google account.
What the audit gives you: not a crawl, but Google’s own view of your site: which pages are indexed and why others are not, the searches that bring clicks, Core Web Vitals from real Chrome users, and any manual action.
Good at: it is the only tool here that shows what Google itself has done with your pages. URL Inspection tells you how Google sees one page, you can submit your sitemap, and email alerts tell you when something breaks. Our Search Console audit goes through it report by report.
Falls short: it is not a crawler. It will not list every broken link, title or redirect on your site, which is what the tools above are for. Exports in the browser stop at 1,000 rows, and it keeps about 16 months of data.
How to choose an SEO audit tool #
- Count your pages. Under 100: a free plan may do. Up to 10,000: almost anything. Above that, check the page limit first, because it decides the price. Look for the limit per audit as well as per month: Ahrefs Lite, for example, stops at 25,000 pages per project.
- Count your sites. Project limits matter as much as page limits. Several cloud plans cover only 3 to 5 sites, as the 8-site example above shows.
- Decide if you need keyword and backlink data. If yes, a cloud suite. If you only need the audit, a desktop crawler.
- Check who reads the result. If clients do, you need branded reports, and some tools charge extra for white label or only offer it on a higher plan.
- Work out the year, not the month. Use the tables above, then check the current price on the tool’s site.
- Try two. Most have a free trial or free version. Crawl the same site in both and compare what each finds and how clearly it explains it.
Common mistakes when picking one #
- Paying for a suite when you only need the audit. The audit is often the smallest part of what a suite costs.
- Ignoring page limits. An audit that stops at 10,000 pages on a 40,000-page site misses most problems.
- Ignoring project limits. A plan that covers 3 sites is not cheap if you have 8 clients.
- Trusting the health score. A score is a summary. The list of issues, in order, is what matters.
- Skipping Search Console. A crawler shows what is on your site; only Search Console shows what Google did with it.
Summary #
The best SEO audit tool depends on your site, how many sites you look after, and your budget. For a full crawl with no page limit at the lowest price, SEOSage from $9 a month. For deep technical work, Screaming Frog or Sitebulb. For an audit inside a keyword and backlink suite, Semrush, Ahrefs, SE Ranking or Moz Pro, at about $1,200 to $1,700 a year billed monthly. For a small site on a budget, Seobility. For very large sites, JetOctopus. And Google Search Console, free, next to all of them.
FAQ #
What is the best SEO audit tool? #
It depends on what you need around the audit. For a full audit of every page at a low price, a desktop crawler such as SEOSage, Screaming Frog or Sitebulb. If you also need keyword and backlink data in the same account, a suite such as Semrush, Ahrefs, SE Ranking or Moz Pro, at about ten times the price. Whichever you pick, add Google Search Console, which is free.
What is the best free SEO audit tool? #
Google Search Console, for what Google sees. For a crawl, Screaming Frog’s free version covers up to 500 URLs, Seobility’s free plan up to 100 pages per crawl, and Ahrefs Free gives 5,000 crawl credits a month on sites you verify. Most paid tools, SEOSage included, have a free trial, which is the easiest way to audit a bigger site for free once.
How much does an SEO audit tool cost? #
From free to about $350 a month. In our 9 November 2026 check, the cheapest plan with a site audit cost $9 a month on SEOSage, $18 on Sitebulb, $99 to $139 on the main cloud suites, and $349 a month billed yearly on JetOctopus, which has no monthly plan. Screaming Frog has no monthly plan either: $279 a year.
Is a desktop crawler or a cloud tool better? #
A desktop crawler is cheaper for big sites, has no monthly page allowance, can reach staging sites from your computer, and keeps the data on your machine. A cloud tool runs without your computer, crawls on a schedule, and adds keyword and backlink data. Many SEOs use one of each: a desktop crawler for full audits and a cloud suite for research.
How often should I run an SEO audit? #
A full crawl once a month, and again after any big change to the site, such as a new design, a new CMS or a move to new addresses. Check Search Console every week, because it shows indexing problems as Google finds them, often before a monthly crawl would.
Sources #
- Google: Google Search Console
- Google Search Console Help: Page indexing report
- Google Search Console Help: About Search Console
- Google Search Central: SEO Starter Guide
- Google Search Central: How to write high quality reviews
- Ratings: each tool’s reviews page on G2, checked on 10 November 2026.
Recommended #
- How to Do an SEO Audit: 12 Steps (With Free Tools)
- Technical SEO Audit Checklist: 25 Checks + Free PDF
- Google Search Console Audit: 12 Checks and a Free Checklist
- What Is an SEO Audit? Includes a Real Example
- SEOSage vs Screaming Frog
- Best White Label SEO Software in 2027: 10 Tools Compared
- Best SEO Reporting Tools in 2027: 10 Compared With Prices
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