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SlapMyWeb
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Honest comparison

SlapMyWeb vs Semrush Site Audit

Semrush Site Audit is the cloud crawler inside the Semrush suite, checking a site against 140+ technical and on-page SEO issues with scheduled recrawls and thematic reports.

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Straight answer first

What each one
is actually better at

We are not going to pretend Semrush Site Audit is bad. It is not. Here is the honest split.

Where SlapMyWeb wins
  • Costs far less to use properly: free at 10 scans a day with the full issue list, and $9/mo for Pro, versus Site Audit being bundled into Semrush plans that start around ~$140/mo.
  • Scores beyond SEO: 240+ checks across 8 weighted pillars, including Security, Accessibility, Design and Mobile, rather than a single site-health percentage built around crawl issues.
  • Includes a WCAG 2.2 AA accessibility audit via axe-core and a security and compliance module in the same scan.
  • Generates fix code for the issues it finds (full on Pro), so each finding comes with an implementation, not only a description and a how-to-fix note.
  • Writes a plain-English verdict and prioritized action plan that a non-SEO client or developer can read without learning a dashboard first.
  • Agency features land early on the price ladder: white-label PDFs, bulk scans and multi-client workspaces on the $29/mo Agency tier.

Where Semrush Site Audit wins

  • It crawls whole sites: Semrush's documentation lists up to 20,000 pages per audit on entry paid plans and 100,000 on the top tier, far beyond SlapMyWeb's single-site scan.
  • Scheduled daily or weekly recrawls with issue history make it a strong ongoing monitor for large sites, not just a one-off check.
  • It sits inside the Semrush suite, so audit findings live next to one of the largest keyword, backlink, rank-tracking and competitor datasets in the industry.
  • Thematic reports, including crawlability, internal linking, HTTPS, international SEO, Core Web Vitals and an AI Search category, help large teams triage by area.
  • A mature product with Zapier integration, PDF, CSV and Excel exports, and Semrush's reporting tools, now backed by Adobe after its 2026 acquisition.

We keep this section honest on purpose. Semrush Site Audit is a good tool with real advantages — pick the one that fits the job in front of you.

The detail

How they differ
once you look closely

What Semrush Site Audit is, and what it is not

When people search for "Semrush site audit", they are usually deciding whether Semrush's crawler is worth the subscription, or whether a cheaper audit gets them most of the way. It helps to separate the tool from the suite. Site Audit is the crawler inside Semrush: you set up a project, it crawls the site, checks pages against 140+ technical and on-page issues, assigns a site-health score and groups findings into errors, warnings and notices, with thematic reports for areas like crawlability, internal linking and Core Web Vitals. It is not sold on its own; you get it as part of a Semrush plan, and the free account caps crawls at 100 pages. Our broader Semrush comparison covers the whole suite. This page is only about the audit: what each tool checks, how deep it goes, and what you pay to use it seriously.

Crawl scale is Semrush's clearest win

If your site has thousands of URLs, Semrush Site Audit does something SlapMyWeb does not: it crawls the whole property. Semrush's own documentation lists 20,000 pages per audit on its entry paid plans and 100,000 on the top tier, with scheduled daily or weekly recrawls so new issues show up without anyone remembering to rerun a scan. That makes it good at catching site-wide patterns such as orphaned pages, redirect chains, duplicate titles across templates and broken internal links deep in the archive. SlapMyWeb runs a single-site audit per scan and is not a crawler built for 100,000-URL sites. For a large e-commerce catalog or a publisher with years of content, that difference is decisive, and you should weigh it before anything else on this page.

Check breadth: SEO crawl versus 8 scored pillars

Semrush Site Audit is an SEO crawler first, and its checks reflect that: indexability, status codes, metadata, canonicals, hreflang, internal linking, HTTPS, markup and performance, plus a newer AI Search category. SlapMyWeb runs 240+ checks scored into 8 weighted pillars: Speed 20%, SEO 18%, Security 15%, Mobile 12%, Design 10%, Accessibility 10%, Best practices 8% and Content 7%. The practical difference shows up outside SEO. SlapMyWeb includes a WCAG 2.2 AA accessibility audit via axe-core, a dedicated security and compliance module, design and conversion heuristics, and Core Web Vitals from PageSpeed Insights v5 and CrUX field data. On AI crawlers, SlapMyWeb checks observed robots.txt rules for selected AI crawlers, optional guidance-file (llms.txt) presence and selected page signals. These checks do not measure citation visibility. Neither tool's check counts are directly comparable, so judge by which categories your site actually needs covered.

From finding to fixed, and what it costs

Semrush explains each issue and links to guidance on how to fix it, which works well for SEO specialists who already know where to make the change. SlapMyWeb goes one step further: each issue gets a place in a prioritized action plan and generated fix code, full on Pro and blurred on Free, so a developer can implement without translating SEO terminology. The other difference is price. Site Audit comes bundled in Semrush plans, and the SEO plan runs around ~$140/mo billed monthly. If you also use Semrush's keyword, backlink and rank-tracking data every day, that is reasonable value. If what you mainly need is a reliable audit, SlapMyWeb is free at 10 scans a day with the full issue list, $9/mo for Pro, and $29/mo for Agency with white-label PDFs, bulk scans and multi-client workspaces.

The bottom line

Choose Semrush Site Audit if you need to crawl large sites on a schedule and you already rely on Semrush for keyword, backlink and competitor research. Its crawl scale, recrawl history and the dataset around it are real strengths, and SlapMyWeb does not compete with them. SlapMyWeb's own keyword and backlink data is smaller and resold from DataForSEO, and the product only launched in 2026. Choose SlapMyWeb if your audits are for small and mid-size sites, if you need accessibility, security and design covered alongside SEO, or if you want fix code and a plain-English report you can hand to a client, at a fraction of the price. Plenty of teams use both: Semrush for site-wide crawling and research, SlapMyWeb for page-level audits and client deliverables. Run a free SlapMyWeb scan on a site you have already audited in Semrush and compare the two lists.

Decide in ten seconds

Which one
should you open?

Pick SlapMyWeb when…

Pick SlapMyWeb when you audit small and mid-size sites and want accessibility, security, design and SEO scored together, with generated fix code and a plain-English action plan. It is also the budget choice: free at 10 scans a day and $9/mo for Pro, instead of a ~$140/mo suite plan.

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Pick Semrush Site Audit when…

Pick Semrush Site Audit when you need to crawl thousands of pages on a daily or weekly schedule, track issue history across a large site, and keep audit findings next to Semrush's keyword, backlink and competitor data that your team already uses.

Feature comparison

Side-by-side,
line by line

No asterisks. Where we lose, the row says so.

FeatureSlapMyWebSemrush Site Audit
Entry price for a usable auditFree (10 scans/day); Pro $9/mo~$140/mo SEO plan; free account is 100 pages
Crawl depthSingle-site audit per scanThousands of pages per audit
Scheduled recrawlsScheduled reportsDaily or weekly
Number of checks240+ across 8 scored pillars140+ SEO and technical checks
Accessibility audit (WCAG 2.2 AA)YesNo
Security and compliance checksDedicated moduleHTTPS report
Core Web VitalsPageSpeed Insights v5 + CrUX field dataCore Web Vitals report
JavaScript renderingPuppeteer render auditHigher-tier plans
AI crawler checksrobots.txt rules for selected AI crawlers, llms.txt presenceAI Search issue category
Generated fix codeYes (full on Pro)No
Plain-English verdict and action planYesIssue list with how-to-fix notes
Keyword and backlink dataSmaller, DataForSEO-poweredVery large first-party databases
White-label client reportsAgency, $29/moAvailable via Semrush reporting
Integrations ecosystemSmall (Slack, email, exports)Broad, including Zapier
Starting price$0 free / $9 Pro / $29 Agency~$140/mo SEO plan billed monthly (~$117/mo annually); free account limited to 100 pages
$0 free / $9 Pro / $29 Agency
SlapMyWeb
Full audit free forever
~$140/mo SEO plan billed monthly (~$117/mo annually); free account limited to 100 pages
Semrush Site Audit
Entry plan

Semrush Site Audit pricing is approximate (~) and changes often. Check their pricing page before you decide.

See it before you switch

This is the whole product, free, without an account

Paste a URL and you get the full audit — every pillar, every check, a score and a plain-English verdict. No trial timer, no card, no "unlock to view". Compare that against whatever Semrush Site Audit shows you before signup.

Audit my site free
62Your score

One weighted number, then the issues that produced it — ranked by the points each one cost.

  • No llms.txt — AI engines can’t cite you−9
  • LCP 4.1s on mobile−7
  • Missing meta description on 12 pages−4
FAQ

SlapMyWeb vs Semrush Site Audit:
common questions

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