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
- Website auditing splits into desktop crawlers for deep technical work and hosted tools for scheduled audits with client friendly reports, and most teams use one of each.
- Crawl limits decide value, since free tiers cap pages at 100 to 500 URLs while paid plans range from 10,000 URLs per audit to millions per month.
- Scheduled cloud crawls prevent the failure mode where nobody runs the audit, leaving a dated baseline to compare against after each deploy.
- A crawler that only lists errors is half a tool, so check whether results include prioritized fixes, visual reports, and Google data connections.
- Start with free tools for small sites, then pay for depth, scheduling, or scale only when free caps block real work.
Quick comparison
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Starting priceFree
Free planYes
Screaming Frog SEO Spider is the crawler every technical SEO runs, finding status codes, redirects, canonicals, titles, headings, links, images, schema, and JavaScript rendering issues across a full site. The free version covers up to 500 URLs, which suits most small sites, while the paid licence runs about 259 to 279 dollars a year depending on source, or 199 pounds, for unlimited crawls limited only by machine memory and storage. Command line scripting and scheduling on the licence version support automated pipelines.
The trade off is interpretation. Screaming Frog shows the raw truth of every URL and exports it to spreadsheets, but it does not explain what to fix in plain language, and turning output into a client report takes work. Screaming Frog fits technical SEOs and agencies that need the deepest crawl and can interpret raw data.
What we like- Deepest crawl depth and customization
- JavaScript rendering on licence
- Scriptable command line crawls
Watch out for- No scheduling on free version
- No hosted reports
- Output needs interpretation
#2Sitebulb
Best for: Prioritized, visual audit reports4.5/5 on
G2 (13 reviews, checked Oct 2026)
Visit sitebulb.com
Starting price$18 per month
Free planNo
Sitebulb pairs desktop crawling with prioritized hints and visual reports that clients actually understand, which sets it apart from raw data crawlers. Lite pricing starts near 18 dollars a month with 10,000 URLs per audit, while Pro runs about 42 dollars a month with 500,000 URLs per audit, raisable to 2 million, and cloud plans start near 95 pounds a month. Scheduling, cloud API access, and Search Console and Analytics connections support regular audit cadences.
The limits are trial length and Lite caps. There is no permanent free plan, only a 14 day trial, and Lite audits cap at 10,000 URLs, so large sites need Pro. Sitebulb fits freelancers, agencies, and SMBs that want guided, report friendly audits rather than raw crawl exports.
What we like- Prioritized hints system
- Visual reports clients understand
- Crawl comparison
Watch out for- 14 day trial only
- Lite caps at 10,000 URLs per audit
- Cloud plans cost more
Starting price$129 per month
Free planYes
Ahrefs Site Audit tracks more than 100 issues with a health score, scheduled cloud crawls, and JavaScript rendering as a crawl setting, inside the SEO suite many teams already use. Lite pricing starts at 129 dollars a month with 100,000 credits a month and 25,000 pages per project, while higher tiers run to 1,499 dollars for Enterprise with 5 million pages per project. Ahrefs Free Webmaster Tools give verified site owners 5,000 credits a month, which covers small site audits at no cost.
The trade off is credit math and tiering. Lite caps bind large or multi project teams, and API access is tiered. Ahrefs Site Audit fits SMBs and agencies that want audits inside a full SEO suite with backlink and keyword data beside crawl results.
What we like- 100 plus issues tracked
- Health score
- Scheduled cloud crawls
- Backlink data in suite
Watch out for- Lite caps at 100,000 credits a month
- Full tiers cost more
- API access is tiered
Starting price$139 per month
Free planYes
Semrush Site Audit runs more than 140 checks with Core Web Vitals, thematic reports, and scheduled crawls, inside the marketing suite many teams already pay for. SEO pricing starts at 139 dollars a month with 100,000 pages a month and 20,000 per audit, while Pro plus at 299 dollars adds JavaScript rendering and higher limits, and Advanced plans reach 1 million pages a month. A free account covers 100 pages a month, with a 7 day trial of paid plans.
The limits are caps and rendering tiers. Entry plans cap pages and audits, and JavaScript rendering needs Pro plus or Advanced. Semrush Site Audit fits suite users and agencies that want audits plus keyword, content, and competitor research in one subscription.
What we like- 140 plus checks
- Core Web Vitals
- Thematic reports
- Scheduled crawls
Watch out for- SEO tier caps at 100,000 pages a month
- JavaScript rendering needs Pro plus
- Suite price is high
#5SE Ranking
Best for: Agencies needing audits plus API4.7/5 on
G2 (1,606 reviews, checked Oct 2026)
Visit seranking.com
Starting price$129 per month
Free planNo
SE Ranking Website Audit combines auditing with scheduling and API access on every plan, which suits agencies building automated site health pipelines. Core pricing starts at 129 dollars a month with 250,000 pages a month, while Growth at 279 dollars reaches 2 million pages, with JavaScript rendering as a crawl setting and Search Console and Analytics connections. White label reports help agencies present results under their own brand.
The trade off is trial length and tier jumps. There is no permanent free plan, only a 14 day trial, and Growth costs more than double Core. SE Ranking fits agencies on the platform that need audits, scheduling, and API access in one plan.
What we like- Audit plus schedule plus API on one plan
- Large crawl capacity
- White label reports
Watch out for- 14 day trial only, no card needed
- Core caps at 250,000 pages
- Growth costs 279 dollars
#6Google Search Console
Best for: Free indexing and Core Web Vitals4.7/5 on
G2 (513 reviews, checked Oct 2026)
Visit search.google.com
Starting priceFree
Free planYes
Google Search Console is the free baseline every site owner should use, showing index coverage, Core Web Vitals, mobile usability, and crawl errors straight from Google for all indexed pages. No paid crawler replaces its first party data on how Google sees a site, and it pairs with paid tools that find issues Search Console does not surface. Every audit workflow should start here before paying for depth.
The limits are scope. Search Console is not a full site crawler, offers no competitor data, and produces no scheduled audit reports with prioritized fixes. Search Console fits every site owner as the free foundation, best paired with one crawler for depth.
What we like- Free
- Real Google indexing data
- Core Web Vitals from Google
- Covers all indexed pages
Watch out for- Not a full crawler
- No competitor data
- No scheduled audit reports
Starting priceFree
Free planYes
Lighthouse is the free single page auditor built into Chrome, checking performance, accessibility, best practices, and SEO for one URL at a time, with PageSpeed Insights offering the same checks hosted. For diagnosing a slow homepage or a template page before and after a deploy, Lighthouse gives fast, specific guidance with no account or cost. Developers use it inside Chrome DevTools during every build.
The trade off is scale. Lighthouse audits one page at a time, with no site wide crawl, scheduling, or history, so it cannot replace a crawler for full site health. Lighthouse fits developers and site owners checking key pages in depth, best paired with a crawler for site wide coverage.
What we like- Free
- Performance, accessibility, and SEO checks per page
- Built into Chrome
Watch out for- One page at a time
- No site wide crawl
- No scheduling or history
#8Seobility
Best for: Budget all in one audits4.6/5 on
G2 (405 reviews, checked Oct 2026)
Visit seobility.net
Starting priceSee website
Free planYes
Seobility is a budget all in one tool with a crawler, rank tracking, and on page checks in one interface, plus a permanent free Basic plan covering 1 project, limited pages, and 10 tracked keywords. Paid Premium pricing is reported near 59.90 to 69.90 euros a month depending on source, so check the current pricing page. For SMB owners, freelancers, and bloggers, Seobility covers the audit basics without suite pricing.
The limits are free caps and depth. The free plan caps at 100 pages, and crawl depth sits below Screaming Frog, Sitebulb, and the big suites. Seobility fits small sites and budget teams that want an affordable all in one audit tool with a real free plan.
What we like- Permanent free Basic plan
- Crawler plus rank tracking
- Simple interface
Watch out for- Free plan caps at 100 pages
- Premium price varies by source
- Smaller crawl depth than leaders
How we chose
We compared published pricing pages and third party audit tool comparisons from September and October 2026, recording crawl limits and scheduling at the entry tier rather than headline claims. We favored tools with scheduled cloud crawls, prioritized fixes, and Google data connections, and we flagged where prices conflict across sources by writing See website. We treated vendor health scores as starting points, since scores weight issues differently, and we weighed desktop depth against hosted convenience as a real trade off.
Start with site size. Sites under 500 URLs can audit free with Screaming Frog or Search Console, while larger sites need paid crawl capacity. Next, decide between desktop depth and hosted scheduling: technical teams should shortlist Screaming Frog and Sitebulb, while teams that need regular reports should look at Ahrefs, Semrush, or SE Ranking. Then test the tool on your own site during trial and check whether its prioritized fixes match the issues that actually hurt traffic. Finally, schedule audits on a cadence, monthly for most sites and after every major deploy for large ones, since a one time audit decays fast. A tool that fits that cadence will keep errors visible before they cost traffic.
Frequently asked questions
What is the best free website auditing tool?
Screaming Frog free covers up to 500 URLs with deep crawl data, Google Search Console covers indexing for all pages free, and Lighthouse covers single page diagnostics free, so most small sites can audit at no cost.
How often should I audit my website?
Most sites benefit from a monthly audit, with an extra audit after major deploys, migrations, or template changes, since new errors appear with every release.
Do I need a paid audit tool for a small site?
Not usually. Free tiers cover small sites well, and paid tools pay off when free caps block real work, when you need scheduled audits, or when client reporting matters.
What is the difference between a desktop crawler and a hosted audit tool?
Desktop crawlers such as Screaming Frog and Sitebulb run on your computer with deep control, while hosted tools such as Ahrefs, Semrush, and SE Ranking run scheduled cloud crawls with client friendly reports.
Which audit tool is best for agencies?
Sitebulb suits report friendly audits, SE Ranking suits audits plus API pipelines, and Ahrefs and Semrush suit agencies already on those suites, so the best pick depends on existing tooling.
Do audit health scores predict rankings?
No. Health scores summarize issue counts with vendor specific weights, so treat them as triage signals and fix issues that affect crawling, indexing, and user experience first.
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.
Screaming Frog
Ahrefs Site Audit
Semrush Site Audit
Lighthouse