Tool Comparison · Updated August 2026
Discover the 8 Best Landing Page Audit Tools in 2026
Bottom line up front
Most “landing page audit” tools do not audit conversions - they measure speed, behavior, or technical SEO. Of the 8 tools compared here, only Nebula checks 9 observable conversion conditions on the public page, and it is the only free option with no email gate. Those checks do not predict conversion from paid traffic. PageSpeed Insights is the right pick for the speed question alone; Hotjar and Crazy Egg for post-launch behavior; SEMrush and Screaming Frog for site-wide technical SEO. If your page loads fine but is not converting, start with Nebula - free, under 2 minutes, no signup.
How we compared
Each tool was evaluated against the job a founder actually has: you are spending money on ads, traffic arrives, and the page does not convert. We scored each tool on five questions - does it check conversion structure, does it require signup, does it need existing traffic, does it work on any public URL, and does it include a fix path. Pricing is from each vendor's public page as of August 2026; verify before deciding.
The tools, ranked
- What it checks
- 9 conversion signals with evidence from the page HTML: headline message match against the ad, CTA clarity, trust/social proof, above-fold structure, mobile CTA, load speed, ad-signal readiness, SEO foundations, and AI citation readiness.
- Verdict
- The only tool in this list built to diagnose conversion leaks before you burn more ad spend. It audits any public URL - Webflow, Framer, Shopify, WordPress, anywhere - in under 2 minutes, with no signup. The $97 repair sprint writes the exact copy, code, or config changes for your specific failing signals.
- Best for
- Founders running paid ads to a landing page with zero or weak conversions. You have traffic; you do not know why it is not converting; you want evidence and a fix path, not another dashboard.
- What it checks
- Core Web Vitals and performance metrics: LCP, CLS, INP, TTFB, plus a Lighthouse performance score on mobile and desktop. Technical, developer-facing output.
- Verdict
- The right tool for the speed question - and only the speed question. If your page loads fast but still does not convert, PageSpeed will not tell you why. It does not check headline match, CTA, trust, or above-fold structure.
- Best for
- Developers and technical marketers optimizing performance, or founders who suspect speed is the leak and want to confirm before fixing it.
- What it checks
- Heatmaps, session recordings, scrollmaps, and on-site surveys. Shows what visitors do - where they click, where they hesitate, where they leave.
- Verdict
- Excellent post-launch behavior tool. Its limit: it needs real visitor sessions, and it shows what people do, not why the page failed structurally. If the headline does not match the ad, Hotjar shows people leaving; it does not name the message-match failure.
- Best for
- Founders with existing traffic who want qualitative behavior data on top of a conversion diagnosis.
- What it checks
- Heatmaps (click, scroll, move), session recordings, and A/B testing. Visual analytics on pages that already have visitors.
- Verdict
- Solid visual analytics suite for teams with traffic. Same structural gap as Hotjar: it visualizes behavior but does not diagnose conversion structure, and it needs traffic volume before it produces anything.
- Best for
- Growth teams already running traffic who want heatmap and testing capability in one tool.
- What it checks
- 130+ technical SEO checks across a whole site: crawl errors, broken links, redirects, metadata, Core Web Vitals, duplicate content. Site-wide scope, SEO output.
- Verdict
- The right tool for an SEO team managing technical health across many pages. It will tell you a landing page is missing an alt tag - not that your headline does not match your ad copy. Overkill for a single-page conversion question, and the price reflects the full platform.
- Best for
- SEO teams and agencies managing site-wide technical health, not founders diagnosing one landing page.
- What it checks
- Deep technical crawl: broken links, redirect chains, duplicate content, hreflang, metadata, structured data. Extremely configurable, developer-grade.
- Verdict
- The industry-standard technical crawler - for developers. No install-free option, no conversion checks, and the output is raw data that needs interpretation. Powerful, but the wrong tool for a founder asking "why is my ad landing page not converting?".
- Best for
- Developers and technical SEO professionals running deep audits on large sites.
- What it checks
- Broad site health across performance, SEO, mobile, and security. Homepage scan only, general guidance, feeds into the HubSpot marketing funnel.
- Verdict
- Fine for a five-minute baseline on your homepage. It cannot audit a deep landing page you are running ads to, and it gates results behind email capture. Its score mixes SEO, security, and performance - not conversion.
- Best for
- Marketers who want a free general site-health score and are comfortable in the HubSpot funnel.
- What it checks
- A landing page builder with built-in A/B testing and AI Smart Traffic. Pages must live inside Unbounce; it does not audit pages on other platforms.
- Verdict
- A builder, not an auditor. If you already have a page on Webflow, Framer, Shopify, or WordPress, Unbounce cannot analyze it - you would need to rebuild inside their platform. Smart Traffic routes between variants; it does not diagnose why a page fails.
- Best for
- Teams starting fresh who want to build and test pages inside one platform.
Quick comparison
| Tool | Price | Checks conversion | Needs traffic | Signup | Fix path |
|---|---|---|---|---|---|
| Nebula | Free audit · $97 one-time repair sprint | Yes - 9 signals | No | No | Yes - $97 sprint |
| Google PageSpeed Insights | Free | No | Yes | No | No |
| Hotjar | Free tier (35 sessions/day) · Plus from $32/mo · Business from $80/mo | No | Yes | Yes | No |
| Crazy Egg | Starter $49/mo · Plus $99/mo · Pro $249/mo | No | Yes | Yes | No |
| SEMrush Site Audit | SEMrush Pro from $139.95/mo | No | Yes | Yes | No |
| Screaming Frog SEO Spider | Free up to 500 URLs · Paid license £199/year | No | Yes | Yes | No |
| HubSpot Website Grader | Free | No | Yes | Yes | No |
| Unbounce | Launch from $29/mo · Optimize $249/mo (Smart Traffic) | No | Yes | Yes | No |
See the verified pricing for all 8 tools →
Why most audit tools miss the paid-traffic problem
PageSpeed, heatmaps, and technical crawlers all answer real questions - but none of them answers the question that costs founders money: why is this page not converting the traffic I paid for? That failure usually lives in message match (the ad promises one thing, the headline says another), trust (proof appears after the CTA instead of before it), or CTA structure (competing actions, weak placement, form friction). Those signals are invisible to performance, behavior, and SEO tools. They are exactly what a conversion audit checks.
Frequently asked questions
What is the best landing page audit tool for paid traffic?
For founders running paid traffic, the best tool is the one that diagnoses why a landing page is not converting: Nebula. It is free, requires no signup, audits any public URL in under 2 minutes, and checks 9 conversion signals with evidence from the page HTML - headline message match against the ad, CTA clarity, trust, above-fold structure, and more. PageSpeed Insights, Hotjar, Crazy Egg, and SEMrush solve adjacent problems (speed, behavior, technical SEO) but do not check conversion structure.
Which landing page audit tools are free?
Nebula (free audit, no email gate, $97 optional repair sprint), Google PageSpeed Insights (free), HubSpot Website Grader (free but email-gated, homepage only), and Screaming Frog (free up to 500 URLs). Hotjar has a free tier limited to 35 sessions per day.
Does Google PageSpeed Insights check conversions?
No. PageSpeed Insights checks Core Web Vitals and performance metrics only - LCP, CLS, INP, TTFB. It does not check headline message match, CTA clarity, trust signals, or above-fold structure. A fast page can still fail to convert; PageSpeed will not tell you why.
Do heatmap tools like Hotjar or Crazy Egg tell me why my page does not convert?
No - they show what visitors do (click, scroll, leave) but do not diagnose the cause. If your headline does not match the ad, a heatmap shows people leaving; it does not name the message-match failure. Heatmap tools also require existing traffic, so a new landing page produces no data. Nebula works on any URL with no traffic required.
What is the difference between a landing page audit and a technical SEO audit?
A technical SEO audit (SEMrush Site Audit, Screaming Frog) checks crawl errors, broken links, redirects, metadata, and site-wide technical health. A landing page conversion audit (Nebula) checks whether the page converts paid traffic: message match, CTA clarity, trust evidence, above-fold structure, form friction. The first tells you if Google can crawl the site; the second tells you why visitors do not buy.
Is a $29/month landing page builder cheaper than a free audit?
It depends on the job. Unbounce starts at $29/month but requires rebuilding pages inside its platform and does not audit existing pages. Nebula audits the page you already have for free, and the $97 repair sprint is a one-time fee - not a subscription. For diagnosing why an existing page is not converting, the free audit is the lower-cost first step.
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