12 Best Reliable SEO Audit Tools for Effective Website Analysis

An SEO audit is a comprehensive analysis of all factors that affect the website’s performance in search results.

SEO professionals conduct SEO audits whenever they start working on a new website. Also, periodic SEO audits are recommended to be carried out at least once every six months.

The audit covers the following aspects of SEO:

  • On-page SEO (including meta tags, structured data, etc.)
  • Off-page SEO (covering all aspects related to backlinks)
  • Technical SEO (focusing on website crawlability, loading speed, mobile friendliness, etc.).

This is where SEO audit tools come into play, providing automated assistance to analyze and report the various factors influencing a website’s search engine performance.

In this article, I want to showcase the 12 best SEO audit tools used by hundreds of thousands of SEOs and webmasters.

1. Ahrefs Webmaster Tools (AWT)

Disclosure: I work at Ahrefs, so there might be a hint of bias here.

Ahrefs’ Webmaster Tools dive deep into your website to uncover technical and on-page SEO issues and provide an overall SEO health score with data in charts to understand where you stand clearly. Generally, AWT is a free version of Ahrefs’ Site Audit and Site Explorer tools.

With the capability to check against over 140 pre-defined SEO issues, Ahrefs provides actionable insights to enhance your search engine rankings.

Furthermore, it enables you to analyze backlinks and organic rankings for your websites.
Ahrefs’ webmaster tools are free, but only for websites where you can confirm the ownership.

Pros of AWT:

  • Free for verified websites
  • Comprehensive analysis with an overall SEO health score.
  • Data visualization.
  • Checks for over 140+ pre-defined SEO issues (you can also create/track your own custom issues).
  • Cloud-based with scheduled automatic crawls.
  • Offers backlink analysis.

Cons of AWT:

  • The interface can take some time to get used to.
  • Requires some technical knowledge to unlock the full potential.

Ahrefs Webmaster Tools are free, making it an excellent solution for small businesses and DIY SEOs.

Recommended reading: Ahrefs Review (from the Inside)

2. SEOptimer

SEOptimer presents itself as a comprehensive SEO audit tool that offers a clear, actionable list of recommendations to improve a site’s SEO health.

Pros of SEOptimer:

  • It crawls your site for a wide array of problems, offering a detailed list of improvements.
  • Generate branded, white-label SEO reports in seconds in various languages.
  • Includes a suite of free additional tools like Meta Tag and Keyword Generators.

Cons of SEOptimer:

  • Gives qualitative recommendations, not actionable steps.
  • While useful, the free tools have limitations that might require an upgrade.

Pricing for SEOptimer starts from $14.25/month and goes up to $44.25/month, billed annually. It is suited for small business owners and webmasters looking to improve their websites, as well as marketing professionals seeking a detailed and actionable SEO audit tool.

3. SEOmator

SEOmator is an in-depth technical SEO analysis tool designed to review websites for SEO health and offer strategies for improvement.

Pros of SEOmator:

  • Features a suite of 23 pro-level SEO tools for a complete analysis.
  • Offers white-label reporting for brand customization.
  • Includes a unique Embedded SEO Audit Widget for websites.

Cons of SEOmator:

  • Less comprehensive solution as compared to others on this list.
  • The platform is reported to have customer support issues.

The pricing plans for SEOmator are based on the number of projects you wish to have, starting at $49/month when charged annually for one project and going all the way to an advanced plan ($279/month), allowing you to run 15 projects.

Also, it offers a free version of the Site Audit tool.

SEOmator is best suited for SEO professionals and agencies that require detailed reports and comprehensive SEO tools for their clients or their websites.

4. ContentKing

ContentKing offers a real-time SEO auditing and monitoring platform that is designed to keep track of your website around the clock. This ensures that you’re immediately alerted to any issues or changes, allowing for swift action to maintain your site’s SEO health.

Pros of ContentKing:

  • Real-time SEO auditing and 24/7 monitoring.
  • Actionable insights and tasks generated by advanced algorithms.
  • Content change tracking for new, deleted, and redirected pages.
  • Unlimited user seats, with no extra cost per user.

Cons of ContentKing:

  • Pricing may be steep for smaller websites with limited budgets.
  • May have a learning curve for new users unfamiliar with SEO tools.

ContentKing’s pricing is based on a combination of the chosen plan and the number of pages, offering Basic, Standard, Pro, and Enterprise plans, with no extra charges for non-page URLs like 404s or redirects. The charges depend on your usage.

The platform is best suited for medium to large businesses and marketing agencies that require continuous monitoring and immediate updates on their website’s SEO status.

5. Sitechecker

Sitechecker not only performs detailed site audits for over 300 potential SEO problems but also monitors site performance over time, tracking changes and their impacts on your site’s health and search visibility

Pros of Sitechecker:

  • Consolidated dashboard for monitoring key metrics.
  • Email alerts for immediate notification of critical issues.
  • Direct integration with Google Analytics and Search Console for enhanced data analysis.

Cons of Sitechecker:

  • Lack of actionable advice on how to solve certain issues.
  • Can exhibit integration issues while connecting to external tools.

The tool offers four tiers of subscription: Basic ($41/month), Standard, Premium($333/month), and Enterprise, aiming to help businesses of all sizes with their SEO goals.

The tool is best suited for those who want an all-encompassing SEO tool that goes beyond simple website auditing.

6. Google PageSpeed Insights

Google PageSpeed Insights is a staple for those who prioritize loading speed as a critical component of user experience and SEO. It’s straightforward: enter a URL, and it swiftly assesses the page, providing a performance score and practical tips for enhancement.

Pros of Google PageSpeed Insights:

  • Delivers specific, actionable steps for optimization.
  • Breaks down performance metrics for both mobile and desktop.
  • Leverages real user data for an authentic performance picture.

Cons of Google PageSpeed Insights:

  • Some features may require advanced understanding to draw insights from.
  • It’s a spot-check, not a continuous monitoring service.
  • It’s specialized only around speed; it doesn’t cover the full SEO spectrum.

Google PageSpeed Insights is a must-have for webmasters, developers, and SEO specialists eager to enhance page loading times and overall site performance.

7. Sitebulb

Sitebulb emerges as a robust desktop-based SEO auditing tool designed to streamline your website analysis with its state-of-the-art crawling technology and JavaScript rendering capabilities.

Pros of Sitebulb:

  • Offers over 300 SEO issues and opportunities, automatically checked and prioritized.
  • Provides in-depth explanations for issues in clear, client-friendly language.
  • Intuitive visualizations and reporting options enhance client communication.
  • No project limits with Sitebulb Cloud, allowing for massive crawls.

Cons of Sitebulb:

  • Desktop-based, which may limit the scope and speed of the crawl depending on your hardware.
  • The Lite version restricts you to 10,000 URLs, with some feature limitations.

Sitebulb’s pricing is tailored to different user needs, with the Lite version starting from $135/year per user to the Cloud version priced at $2940/year.

The Lite version is suitable for those with less frequent audit needs, such as freelancers or startups.

For those looking to crawl very large sites or who have SEO teams needing shared data, Sitebulb Cloud is an option, albeit at a higher price point starting from $245/month.

8. Lumar (ex Deepcrawl)

Lumar is a comprehensive website technical health platform designed to empower SEO, accessibility, and digital marketing teams with actionable insights.

Pros of Lumar:

  • Ultra-fast website crawling capabilities for enterprise-scale sites.
  • Comprehensive coverage of WCAG 2.1 A-AAA for accessibility compliance.
  • Integrates with major analytics and business intelligence platforms.

Cons of Lumar:

  • May be overwhelming for small-scale websites due to its extensive features.
  • The depth of data can require a steep learning curve for new users.

Lumar’s customized pricing plans make it best suited for large-scale enterprises and websites with extensive SEO and accessibility needs, where its advanced crawling speed and comprehensive analytics can be fully leveraged to maintain and improve website health.

9. Oncrawl

Oncrawl is engineered to support a competitive digital strategy for large and intricate sites, ensuring your platform’s visibility on search engines is not left to chance.

Pros of Oncrawl:

  • Oncrawl excels in blending various data types, allowing you to prioritize SEO projects effectively.
  • It thrives on complexity, handling large datasets and big websites with ease.
  • The tool’s segmentation capabilities enable you to spot trends and pinpoint technical behavior for quick wins.
  • Oncrawl maintains a history of your data, aiding in before-and-after scenarios and custom analyses.

Cons of Oncrawl:

  • The dashboard and data interface can be overwhelming for new users.
  • While offering a comprehensive suite of features, the cost may be prohibitive for smaller operations.

Oncrawl’s pricing fits various needs, starting with the ‘Explorer’ plan for consultants and in-house bloggers on a limited budget, offering 100,000 URLs to crawl per month. The ‘Business’ plan caters to SMBs and SEO agencies with growth ambitions, providing 500,000 URLs to crawl. You have to contact them to receive quotes.

The ‘Infinite & Beyond’ plan offers custom solutions for large SEO agencies and enterprise websites, including JavaScript crawling and Big Data exports.

10. Semrush Site Audit

Semrush Site Audit flags over 140 common SEO issues, categorizing them by severity to help you prioritize. The tool’s detailed reports give you the insights needed to understand what’s holding your site back and how to propel it forward.

Pros of Semrush Site Audit:

  • Comprehensive checks across 140+ SEO issues.
  • Prioritization of issues by impact.
  • Simplicity.

Cons of Semrush Site Audit:

  • Lack of customisation and segmentations.
  • Some key auditing features are locked behind higher-tier plans.

Semrush offers a Pro plan ($108.33/month) for freelancers and startups and scales up to Guru and Business plans ($416.66/month) for SMBs and agencies with more extensive requirements.

11. SEO PowerSuite’s WebSite Auditor

SEO PowerSuite’s WebSite Auditor offers a robust set of features for on-page auditing, technical SEO guidance, and reporting.

Pros of SEO PowerSuite’s WebSite Auditor:

  • Mimics search engine bots for thorough site analysis.
  • Offers insights into core web vitals and site performance metrics.
  • Provides keyword-specific optimization advice.

Cons of SEO PowerSuite’s WebSite Auditor:

  • This tool can be hard on the budget for small businesses.
  • Can be demanding on system resources during scans.

WebSite Auditor offers a free version with core functionalities with limited access. The premium plans usually cater to both individual webmasters ($299/year) and SEO agencies ($499/year)

12. SE Ranking’s Website Audit

SE Ranking’s Website Audit tool offers a comprehensive scan of your website against over 120 parameters, providing a detailed picture of your site’s SEO health. It’s designed to be fast, with the ability to crawl up to 1,000 pages in just 2 minutes, ensuring you get a quick yet thorough assessment.

Pros of SE Ranking’s Website Audit:

  • Audits up to 1,000 pages in under 2 minutes.
  • Tailor the audit to focus on specific areas of interest.
  • Compare audits over time to measure improvements.

Cons of SE Ranking’s Website Audit:

  • The free version is significantly limited.

Pricing for SE Ranking’s Website Audit starts from $44.00 per month to $191.20 per month with an annual subscription. It’s best suited for SEO professionals and agencies that require a reliable, fast, and detailed website audit tool.

Wrapping up

These SEO tools offer a variety of features catering to different aspects of website auditing, ranging from on-page analysis to backlink tracking and technical SEO. They assist in identifying issues that may hinder your site’s performance, enabling you to make informed decisions to enhance your rankings and online visibility.

Whether you’re a solo entrepreneur, a burgeoning startup, or a large enterprise, there’s a tool tailored to your needs. Some tools provide in-depth data analysis for the SEO-savvy, while others offer more accessible insights for those just starting out.

Nick is a product marketer and a seasoned SEO specialist at Ahrefs. He is also a regular contributor to the Ahrefs Blog, dedicating his remaining time to enhancing the Ahrefs SEO Toolbar.