Why Ranking Tools Like Semrush Are Becoming Less Reliable
Written by James Alviani on
Published 29 August 2026 by Ankit Chauhan
If you’ve had an email from a stranger warning that your website is “losing customers to competitors” and offering a free audit to prove it, you’re not alone. We’ve had several clients forward these on to us in the last few months, and the pattern is always the same. Here’s what’s actually going on, and why we think it’s worth calling out.
TL;DR: These emails are almost always AI-generated, sent in bulk using free tools like Lighthouse or PageSpeed, and built around a handful of minor technical points that don’t actually explain why a competitor outranks you. They’re designed to create urgency, not to give you an honest picture of your SEO. Genuine SEO agencies grow through results and word of mouth, not fear-based cold outreach.
Here’s a real example, with the business name and competitors changed so we’re not putting anyone on the spot. This is close to word-for-word what landed in one of our clients’ inboxes recently.
Hi,
I was reviewing [Business Name] again and saw that you’re currently ranking at position 12 on page 2 in Google for ‘[service] [suburb]’, while [Competitor A], [Competitor B], and [Competitor C] are all appearing on page 1.
After checking the page, it’s pretty clear why they’re ahead. I found a few issues on your page including a long title tag of 61 characters, a slow server response time of over 3 seconds, and resources not served from CDNs.
I also checked the competitor pages ranking above you, and they’ve all passed these same checks, which is a big part of why they’re holding those stronger positions.
I put together a full breakdown of what’s going on and what could be improved.
Want me to send the report through?
On the surface it reads like someone has genuinely looked at the business. It names the exact ranking position, names three real competitors, and lists specific technical numbers. That’s precisely what makes it convincing, and precisely why it’s worth pulling apart.
None of the detail in that email requires a human to have looked at the site. A ranking position can be pulled from a free rank tracker in seconds. Title tag length, server response time and CDN usage all come straight out of Google’s own free Lighthouse or PageSpeed tool, which anyone can run against any URL with zero SEO knowledge.
String those two things together with a script, personalise the business name and suburb, and you have an email that can be sent to hundreds of tradies, dentists, retailers and clinics a day without a person ever reading the pages involved. The “personal” part is one paragraph of automation, not one hour of analysis.
We’ve written before about how AI can now do the repetitive work fast, and outreach at this scale is a good example. It’s not that AI is being used, it’s that it’s being used to manufacture urgency rather than to help.
Title tag length, server response time and CDN usage are all real, legitimate parts of technical SEO. We check for all three ourselves. The problem isn’t that they’re wrong to mention, it’s that they’re being presented as the whole story when they’re a small part of it.
| What the email flags | How much it typically moves rankings | What’s usually the real gap |
|---|---|---|
| Title tag over 60 characters | Minor. Google often rewrites long titles in the results anyway. | Years of Google reviews and a real local reputation |
| Server response over 3 seconds | Worth fixing, but one of dozens of speed signals Google weighs | A stronger backlink profile built up over time |
| Resources not served from a CDN | Minor, and often not needed at all for a small local business site | Deeper, more complete service and location page coverage |
| (not mentioned) | – | A fully optimised, verified Google Business Profile |
Notice what’s missing from the email entirely. Nothing about reviews, nothing about how long the competitor has been established locally, nothing about their backlink profile, nothing about their Google Business Profile. Those are the factors that most often separate page 1 from page 2 for a local service business, and they’re also the ones that take real work to build, not a quick fix a stranger can sell you in a report.
If you want to understand what a genuine, complete audit actually looks at, we’ve laid it out in why your business website needs an SEO audit.
What the email mentions
What genuinely moves the needle
Building a business through referrals and long-term results is slow. It means doing the work, keeping clients for years, and letting happy clients tell other business owners about you. That’s how we’ve grown, and it’s how most reputable agencies grow.
Fear-based cold outreach is the opposite approach. It’s cheap to run an AI script against thousands of websites, generate a scary-sounding email for each one, and send them all out overnight. Most people will ignore it. A small percentage, worried about losing business, will reply. At that scale, even a low response rate is worth it for the sender, regardless of whether the “audit” holds up to scrutiny.
It’s a similar pattern to the copyright infringement scam emails we’ve written about before. Different subject, same structure: create urgency, cite something that sounds official, and hope the business owner acts before checking whether it actually stacks up.
If you’re weighing up whether an agency reaching out to you is worth listening to, our guide on how to choose the right SEO agency covers the questions worth asking before you hand anyone your time or money.
Don’t panic, and you don’t need to reply. If you’re a Halo client, most of what these emails flag is either already on our radar or a low-priority item your account manager can talk you through. If you want a second opinion, forward it straight to us and we’ll tell you plainly whether there’s anything worth acting on.
SEO is measured over months, through consistent, honest work, not through a single scary email. If you want a sense of what that actually looks like in practice, our piece on the ROI of SEO walks through how real, sustainable results are built.
Had one of these emails yourself and want a straight answer on whether it’s worth worrying about? Send it through to us and we’ll take a look, no sales pitch attached.
Start with a free assessment of your website and marketing. We’ll tell you where you stand and what it would take to become the business your area finds and trusts. No obligation.
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