Type any URL into a website grading tool and you will have a score within 30 seconds. HubSpot gives you a number out of 100. SEOptimer gives you a letter grade. Google Lighthouse gives you four colour-coded circles. Each one is confident. Each one is precise. And each one measures something completely different.
We tested 10 website audit tools against the same set of business websites. The same site scored 91 on one tool and 43 on another. Not because one tool was wrong. Because they were measuring different dimensions of the same site, weighting them differently, and presenting the result as though it were the complete picture.
That gap between "your score" and "your actual situation" is where most business owners get stuck.
The two sides of a website audit
Website audit tools fall into two camps: technical health tools that check what the code does (speed, broken links, security headers, schema markup) and conversion readiness tools that check what the visitor experiences (headline clarity, call-to-action placement, trust signals, contact visibility). After testing all ten tools, the split was obvious, and almost none of them cross the line between the two.
Technical audit tools check what the code does. Page speed. Broken links. Security headers. Schema markup. Mobile viewport settings. Render-blocking JavaScript. Screaming Frog checks over 300 technical items. Google Lighthouse runs roughly 200 audits across performance, accessibility, best practices, and SEO. GTmetrix records a video of your page loading and breaks it into filmstrip frames at tenth-of-a-second intervals.
Conversion audit tools check what the visitor experiences. Is the headline clear? Does the page have a visible call to action above the fold? Are there trust signals: testimonials, client logos, review badges? Is the contact information easy to find? RoastMySite uses AI to evaluate hero sections, copy quality, CTA placement, and social proof, then delivers findings in blunt, plain-English language that a business owner can actually read.
The surprise was not that these two categories exist. It was that almost no tool sits in both.
Website Audit Gap Finder
Select the audit tools you have used. See what they cover and what they miss.
The 10 tools we tested
We tested tools ranging from Screaming Frog's 300-item technical crawl to RoastMySite's AI-powered conversion analysis, with Lighthouse, GTmetrix, SEOptimer, HubSpot Website Grader, Woorank, SiteChecker, WebPageTest, and Nibbler in between. We rated each tool on depth (how many checks it runs), actionability (whether it prescribes the fix, not just the finding), and how well it communicates to a business owner rather than a web developer.
| Tool | Focus | Checks | We rated |
|---|---|---|---|
| Google Lighthouse | Technical performance, accessibility, SEO basics | ~200 audits across 4 categories | 4/5 depth, 2/5 actionability |
| Screaming Frog | Technical crawl: links, redirects, meta data, images | 300+ technical items | 5/5 depth, 2/5 actionability |
| RoastMySite | AI-powered conversion and UX analysis | Hero, copy, CTAs, social proof, design | 3/5 depth, 5/5 actionability |
| GTmetrix | Page speed with video playback | Core Web Vitals + waterfall analysis | 4/5 depth, 3/5 actionability |
| SEOptimer | Multi-category grading (A+ to F) | 10 report sections with letter grades | 3.5/5 depth, 4/5 actionability |
| HubSpot Website Grader | Score out of 100 with mobile emphasis | ~30 checks across 4 dimensions | 2/5 depth, 3/5 actionability |
| Woorank | SEO checklist with CMS-aware advice | 70+ items with traffic-light coding | 3.5/5 depth, 3.5/5 actionability |
| SiteChecker | Site audit with AI Overview tracking | 100+ technical checks + AI visibility | 4/5 depth, 3/5 actionability |
| WebPageTest | Deep performance profiling | Waterfall charts, filmstrip, multi-location | 5/5 depth, 1/5 actionability |
| Nibbler | Accessibility and standards compliance | ~20 checks with simple scoring | 2/5 depth, 2/5 actionability |
What the best tools get right
Three tools stood out from the ten we tested, each excelling in a different dimension. RoastMySite earned our highest actionability rating for its plain-English conversion analysis. Screaming Frog earned our highest depth rating with over 300 technical checks. Lighthouse earned its place as the essential free baseline with roughly 200 audits. None of the three covers the other's blind spot.
RoastMySite: conversion problems in plain English
RoastMySite does something no other tool in our test does. It reads your homepage the way a first-time visitor would, then tells you what is wrong in language a business owner understands. Not "CLS exceeds threshold." Instead: "Your headline says nothing about what you actually do. A visitor landing here for the first time would not know whether you sell software or sandwiches."
It checks hero section effectiveness, call-to-action clarity, social proof presence, copy quality, and visual design coherence. It provides before-and-after rewrites: "Change your headline from [current text] to [suggested text]." That is the difference between a finding and a fix. We rated it 5 out of 5 on actionability because every finding comes with something you can implement the same day.
The limitation is depth. RoastMySite does not check page speed, security headers, schema markup, or any of the 200-plus technical items that Lighthouse and Screaming Frog catch. It is brilliant at telling you why visitors leave. It cannot tell you why Google ranks your competitor higher.
Screaming Frog: 300 checks, one problem
Screaming Frog is the industry standard for technical website crawling. It checks over 300 items: broken links, redirect chains, missing alt text, duplicate content, thin pages, orphan URLs with no internal links, canonical tag conflicts, and dozens more. If something is technically wrong with your website, Screaming Frog will find it.
The problem is presentation. The interface looks like it was designed in 2005, and the output reads like a database export. Every finding is raw technical data. A business owner opening a Screaming Frog report for the first time will see rows of status codes, response times, and crawl depths, and close the tab within 30 seconds. We rated it 5 out of 5 on depth and 2 out of 5 on actionability, because the findings are thorough but require a developer to interpret them.
Google Lighthouse: essential but overwhelming
Lighthouse is free, built into every Chrome browser, and checks roughly 200 items across performance, accessibility, best practices, and SEO. Every web developer knows it. Most business owners have never heard of it.
The SEO category is deceptively simple. It checks only 14 items: meta tags, heading structure, crawlability basics. A site can score 100 on Lighthouse SEO and still rank nowhere, because Lighthouse does not check keyword targeting, content quality, backlinks, or any of the factors that actually determine rankings. That 100 creates a false sense of security.
The Performance category is where Lighthouse earns its value. It measures Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Total Blocking Time (TBT), the three metrics Google uses as ranking factors. But it buries these findings alongside 200 other items, many of them niche accessibility or best-practice checks that have zero impact on whether your website generates enquiries.
The pattern across all 10 tools is consistent: the most thorough tools speak developer language. The most useful tools speak business-owner language. No single tool combines genuine technical depth with conversion analysis in language a business owner can read and act on without hiring someone to translate.
The five things every website audit should check
Across all ten tools, we mapped 120 distinct checks into ten categories. Five matter most for a business owner: speed (Core Web Vitals that affect both rankings and conversion), mobile experience (beyond the pass/fail "mobile-friendly" test), security (headers that build trust), conversion readiness (whether visitors know what to do), and AI readiness (visibility to AI search engines). Here is what each one covers.
1. Speed: the numbers that matter
Three metrics determine whether Google considers your site fast enough: LCP (Largest Contentful Paint) should be under 2.5 seconds, CLS (Cumulative Layout Shift) should be under 0.1, and INP (Interaction to Next Paint) should be under 200 milliseconds. These are the Core Web Vitals, and Google has confirmed they influence rankings (Google Search Central documentation, 2024). SOASTA’s 2017 study of mobile retail sites found that every additional second of load time correlated with a 7 percent drop in conversion rate. Google’s Core Web Vitals documentation corroborates the principle: page speed directly affects both rankings and user behaviour. GTmetrix and Lighthouse both measure these accurately. Most other tools approximate them.
2. Mobile experience: not just "mobile-friendly"
"Mobile-friendly" is a pass/fail test from 2015. In 2026, the question is whether your mobile experience is good enough to convert a visitor who found you through Google Maps or a WhatsApp link. That means touch targets at least 48 pixels wide, text readable without zooming (minimum 16 pixels), no horizontal scrolling, and a visible phone number or WhatsApp button without scrolling down. Google uses mobile-first indexing, meaning it crawls and ranks the mobile version of your site, not the desktop version.
3. Security: the silent trust killer
SSL certificates are table stakes. The checks that matter in 2026 are security headers: Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and X-Content-Type-Options. These prevent common attacks, and their absence is visible to any technical buyer checking your site. Lighthouse and SiteChecker both flag missing security headers. HubSpot and SEOptimer do not.
4. Conversion readiness: does the visitor know what to do?
Your website converts a visitor into an enquiry through a chain: a clear headline that names your service, a visible call to action above the fold, trust signals that reduce hesitation (reviews, logos, case references), and a contact method with minimal friction. RoastMySite checks all four links in this chain. Lighthouse checks none of them. A site can score 95 on Lighthouse and still convert zero visitors because the homepage says nothing specific about what the business does.
5. AI readiness: the dimension most tools ignore
Only two tools in our test check whether your website is ready for AI search engines. SiteChecker tracks whether your pages appear in Google AI Overviews. RoastMySite checks for an llms.txt file and basic LLM accessibility. In 2026, when AI search engines are answering an increasing share of queries, a website that is invisible to AI crawlers is missing a growing source of traffic. Structured data (Schema.org markup), a clear llms.txt file, and FAQ-format content all contribute to AI visibility, and almost no audit tool checks for them.
The sitemap discovery we almost missed
We found that a business's sitemap existed at a non-standard path. Our scan said "not found" because we only checked /sitemap.xml. Lighthouse would have caught it but buried the finding in 200 other items. A business owner reading their Lighthouse report would have scrolled past it.
Our enhanced scan now checks 6 common sitemap paths and explains the result in one sentence: "Your sitemap is at /sitemap_index.xml. Search engines expect it at /sitemap.xml. Either move it or add a reference in your robots.txt file." That is the difference between a technical finding and an actionable one. The fix takes 30 seconds. Finding it took us a full re-examination of how we handle non-standard configurations.
What a complete website diagnostic looks like
A diagnostic that actually serves a business owner needs to cover both sides of the split: the technical dimension (performance, SEO fundamentals, technical health, and mobile usability) and the conversion dimension (headline clarity, CTA placement, trust signals, and contact visibility), plus AI readiness. Based on testing ten tools and mapping 120 checks, the table below captures the six dimensions a complete audit requires.
| Dimension | What it checks | Why it matters |
|---|---|---|
| Performance | LCP, CLS, INP, page weight, server response | Confirmed ranking factor. Every second of delay reduces conversion. |
| SEO fundamentals | Title tags, meta descriptions, heading structure, canonical tags, sitemap | These determine how your pages appear in search results. |
| Technical health | Broken links, redirects, security headers, mixed content | Broken elements erode trust and confuse search crawlers. |
| Mobile usability | Touch targets, font size, viewport, mobile CTA visibility | Google indexes the mobile version. Most visitors arrive on a phone. |
| Conversion readiness | Headline clarity, CTA placement, trust signals, contact visibility, form friction | A technically perfect site that does not convert is a brochure, not a business tool. |
| AI readiness | llms.txt, Schema.org markup, FAQ structure, content citability | AI search engines are a growing source of high-intent traffic. |
The BTR Signal Score checks your website the way a customer uses it, on a phone, and connects what it finds to the searches that send customers there. A slow website drags down your local search ranking. A confusing homepage wastes every visitor that your Google listing, reviews, and social profiles worked to send there. The website is the hub. Everything connects through it.
The presentation problem: grades versus guidance
SEOptimer gives your website a letter grade, A+ through F, across 10 sections. The school-report metaphor works because nobody wants to stay at a C. But a grade alone does not tell you what to fix first, how much effort each fix requires, or which problems actually affect your enquiries.
RoastMySite does something better. It tags every finding with an effort level (quick win, moderate, long-term project) and a business impact rating. That turns a list of problems into a roadmap. Fix the quick wins first. Plan the bigger projects. Ignore the things that cost more to fix than they are worth.
A useful website report combines three elements: a single score (so you know where you stand), a clear rating on each finding (so you know what is urgent), and an effort level on each fix (so you know what to do first). The BTR Signal Score gives all three, with the rating in words and the effort as the minutes each fix takes and who does it.
Where global website benchmarks fall short for local businesses
Every tool we tested uses global benchmarks, which creates two blind spots for a local business. First, hosting distance: a site on a server far from its customers can fail Google's speed thresholds not because of poor code, but because of the latency between the server and the visitor. Second, market-specific feature gaps: local language support, pricing in the local currency, and a WhatsApp contact option are things no global tool checks for.
Take a business in Johannesburg running on a WordPress site hosted in Europe. Its Time to First Byte (TTFB) will fail Google's threshold, not because the site is poorly built, but because the server is 9,000 kilometres from the visitor. The recommendation is not "optimise your code." It is "move your hosting to a South African data centre or use a CDN with a Johannesburg edge node."
The market-specific gaps work the same way. A site should show prices in the local currency, offer the key landing pages in the language its customers read, and give a WhatsApp Business contact option where customers use it. None of the 10 tools we tested check for any of these market-specific elements.
The BTR Signal Score measures your site's speed on a phone and puts any hosting fix on the page for your web person, so a slow result comes with the reason, not just a grade.
See your website's real score
Your website is not just a page. It is the hub that connects every other channel: your Google listing links to it, your social profiles point to it, your WhatsApp messages drive visitors to it, and your competitors are being compared against it. A score that checks only the technical side, or only the conversion side, is giving you half the picture.
The BTR Signal Score checks both, the way a customer would: can they call or WhatsApp you with one tap, is your contact on the first screen, do your hours match Google, and how fast does the page load on a phone.
See your website's real score: technical health and conversion readiness in one view.
About the author
Will Barnardt founded BTR Consult after 15+ years running revenue operations. This post is part of BTR Consult's research into what decides whether customers find, choose and contact a business.
Frequently asked questions
What is a website audit tool?
A website audit tool scans your site and checks for technical issues, SEO problems, speed performance, and sometimes conversion or user experience elements. Tools like Google Lighthouse, Screaming Frog, and HubSpot Website Grader each check different dimensions, so the score you get depends entirely on which tool you use and what it measures.
What is a good Lighthouse score?
Google Lighthouse scores 0 to 100 across four categories: Performance, Accessibility, Best Practices, and SEO. A score above 90 in each category is considered good. Most business websites score between 40 and 70 on Performance. The SEO category is the easiest to max out because it checks only 14 items, most of them basic HTML elements.
Why do different website audit tools give different scores?
Because they measure different things. Lighthouse focuses on technical performance and accessibility. HubSpot Website Grader emphasises mobile readiness and SEO basics. Screaming Frog checks 300-plus technical items but does not score them. RoastMySite uses AI to assess conversion and copy quality. No two tools use the same scoring methodology, so no two tools produce the same grade.
Is a website audit the same as an SEO audit?
No. An SEO audit focuses on search engine visibility: keyword rankings, backlinks, meta tags, and indexation. A website audit is broader, covering speed, security, accessibility, mobile usability, and sometimes conversion elements like CTAs and trust signals. The best diagnostics check both dimensions together.
How often should I audit my website?
A full technical audit every quarter catches drift before it becomes a problem. Core Web Vitals and speed should be monitored monthly because plugin updates, new content, and third-party scripts can degrade performance between audits. Conversion elements, such as CTAs, forms, and trust signals, should be reviewed whenever you notice a drop in enquiries.