Developer Tools
Ground-Truth SEO Scanner
Last updated 2026-10-05 · benchmark measured 2026-10-23 — deterministic & reproducible
Free SEO audit tool that cites every finding to official search engine documentation.
Ground-Truth SEO Scanner at a glance
Ground-Truth SEO Scanner is a free tool that audits public websites against documented guidance from Google, Bing, web standards bodies, and AI crawler operators, producing reports that cite the source passage for every finding.
Good for
- Checking a website's technical SEO setup against officially documented requirements rather than general opinion
- Running repeatable scans in a deploy pipeline, since the same snapshot and ruleset always produce an identical report
- Checking which AI search and training crawlers a site's robots.txt allows, and whether it publishes an llms.txt file
Pricing
Free for up to 200 pages; optional AI content and answer review available with a free account.
Questions people ask
What does a scan with Ground-Truth SEO Scanner cost?
Nothing. You can paste a URL and run a scan without an account, covering up to 200 pages; signing in also saves report history and unlocks the optional AI content review.
Does the score predict search rankings?
No. The score measures how much of the best documented setup a site has in place, not ranking impact, and the site states this explicitly on its scoring page.
Are the scan results reproducible?
Yes. Scans are deterministic, meaning the same stored snapshot, ruleset, and settings always produce an identical report, byte for byte.
Who built the scanner and where do the rules come from?
Book With Haven builds and maintains it, and its knowledge base is derived from Dustin Hofer's The Ground-Truth Guide to Modern SEO, backed by 98 registered sources.
Does it check anything beyond standard SEO, like AI crawlers?
Yes, it includes an AI crawler readiness report showing which search, training, and AI crawlers are admitted by robots.txt and whether the site publishes an llms.txt file, though this does not affect the overall score.
Written by Legit.Show from seoscanner.app on 2026-10-07. It does not change the score.
✓ Verified by the maker on 2026-10-08. Ownership was proven with a meta tag, a DNS record or GitHub admin rights. It does not change the score.
Launched something? Add your product, free.
To cite this score: legit.show/s/seoscanner-app/2026-10-23. That address never changes; this page moves with every re-measure.
Legit.Show scored Ground-Truth SEO Scanner 83/100 on 2026-10-23, measured across all 7 frames from its public surface. legit.show/s/seoscanner-app/2026-10-23
Is Ground-Truth SEO Scanner production-ready?
Legit.Show scores Ground-Truth SEO Scanner 83 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Ground-Truth SEO Scanner (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.
The 7 Frames
- Performance — 81/100
- Accessibility — 97/100
- Security — 80/100How this compares across the catalogue: The Web Security Baseline
- Privacy — 25/100How this compares across the catalogue: The Privacy Gap
- Reliability — 100/100
- Standards — 97/100
- Discoverability — 100/100
What we measured
- Security headers present: HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy.
- No Content-Security-Policy.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 204 ms to first byte.
- Returns a proper 404 for unknown routes.
- 3 of 3 sampled routes reachable.
- No privacy policy found.
- Sets cookies / loads scripts with no consent prompt.
Who it's for
SEO professionals · website owners · developers · technical teams · DevOps engineers
Pricing
Free for up to 200 pages; optional AI content review available with free account
Sources and updates
- Description
- Taken from seoscanner.app's own website on 2026-10-05.
- Operator
- Haven, as named in seoscanner.app's terms, privacy page or footer.
- Benchmark
- Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-10-23.
Put together from public information. Ground-Truth SEO Scanner's maker verified ownership on 2026-10-08, which does not change the score. If anything here is wrong, tell us and a person will check it.
Visit Ground-Truth SEO Scanner → · Alternatives to Ground-Truth SEO Scanner → · How this was measured →