Free audit. No card needed.
Paste a URL. Get a Visibility Score from 0 to 100, plus the 3-5 fixes that move the needle fastest. Your competitors are already optimising. Find out where you stand.
Flatline SEO is a free website audit tool that checks 30+ signals across performance, SEO, mobile, security, and structured data. It produces a Visibility Score from 0 to 100 with plain-English findings sorted by priority. No signup required for your first audit.
Founded in Belfast · GDPR-compliant · Cancel anytime
30+
Signals per audit
7
Audit categories
15s
Average audit time
424+
Sites audited
Used by dentists, restaurants, plumbers, law firms, electricians, and 55 more industries across 45 countries.
The problem
Right now, while you read this, potential customers are searching for your services. They're finding your competitors instead.
6+ seconds to load? 70% never come back
Every second over 3 costs you roughly 7% of visitors. They leave before your page finishes loading. You never see them in analytics.
No description, no schema, no chance
Search engines and AI assistants can't read your mind. Without meta tags and structured data, you're invisible. You're losing to every competitor who has them.
100-page PDFs don't drive action
You don't need 30 pages of jargon. You need 3-5 fixes in priority order that you can act on this week. That's what we give you.
See it in action
No competitor shows you the report first. Pick an industry, hit scan, and see exactly what you get.
Scanning
joes-plumbing.co.uk
Checking page speed...
What you get
One score, a few specific problems, the order to fix them in. The fastest path from "is my site any good" to "here's what I'm doing this week."
One number that summarises your online presence. Performance, SEO basics, mobile-friendliness, security. Weighted into a single signal.
Example: 'Your page takes 6.2 seconds to load on mobile. Most visitors leave after 3.' Not the consultancy translation of that.
Every audit gets a clean URL. Send it to your developer, post it anywhere, keep it as your baseline to measure improvement.
Re-run audits monthly or weekly. Watch the score climb. Get alerted when it drops.
See if ChatGPT, Claude, and Perplexity can find your business. We check AI bot rules, schema, and content readiness. No competitor offers this free.
Meta tag checker, robots.txt validator, sitemap inspector, heading checker, NAP consistency checker, and AI-readiness quiz. All free, forever.
Why us
15s
Time to score
Most tools take 30-60 seconds. We're done while they're loading.
Free
AI Visibility Check
We check if ChatGPT can find you. Semrush charges $120/mo for this.
Plain
English findings
Not 'sub-optimal performance metrics.' We say 'your page takes 6.2 seconds.'
6
Free tools
Meta checker, NAP checker, AI quiz, heading checker, sitemap inspector, robots validator.
What people say
"Ran the audit at 10pm on a Tuesday. Fixed 3 things the next morning. Went from page 3 to page 1 for 'plumber near me' in 6 weeks."
Plumbing business owner
47 → 78
"We used Semrush before. 200 pages of data we never acted on. Flatline gave us 5 things to fix. We fixed them. Score went up 31 points."
Marketing agency
52 → 83
"The AI Visibility Check showed that ChatGPT couldn't find us at all. Added schema markup, submitted to Bing. Now we get cited in AI results."
Dental practice
39 → 71
Scores are real. Names withheld at their request. Results depend on the fixes you actually make.
Pricing
Free forever for one audit a month. Paid tiers add history, alerts and multi-site tracking.
Free
$0 /mo
See your score. One audit a month, no card, no catch.
Starter
$37 /mo
Track one site over time. See what changes after every fix.
Pro
$100 /mo
The full toolkit. Keywords, backlinks, reviews, competitor data.
Agency
$253 /mo
White-label everything. Run it as your own product.
GBP, ex. VAT. Billed monthly. 30 days notice to cancel.
Questions
Yes. No card, no follow-up spam. We email you the score so you can come back to it. One audit per month forever.
It blends speed, SEO fundamentals, mobile-friendliness, structured data and security into a single weighted score. It moves when you fix things, which is the only test that matters.
No. The Free tier shows the full score and findings for one audit per month. Paid plans add history, scheduled re-audits, alerts and multi-site tracking.
EU (London). GDPR-compliant. We delete on request within 30 days.
Yes. Monthly billing, 30 days notice. Downgrade to Free whenever and keep your audit history.
A marketing team founded in Belfast that got tired of generic SEO tools. We use Flatline ourselves every day on real client sites.
Done for you
Tell us what you need fixed. We'll come back within 24h.
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