AboutUsThe independent trust record for every website

Website report snapshot

purplemath.com

Elizabeth Stapel: The primary developer of Purplemath and the author of its lessons is Elizabeth Stapel.

Can I trust this site?

Sourced website trust answer

Website report: review the evidence and ownership status

The live checks and dated facts below help you evaluate this website. If you own it, claiming it free turns this into an owner-controlled record.

Facts, not verdicts. AboutUs shows sourced signals and the next owner action; it is not a scam label.

Clean current signals

No live check or safety-model signal has flagged an issue on this snapshot.

Source freshness: 104 days old

Authority

Not scored yet

Not enough independent signals yet

Safety

90/100

No known risk flags

Known risk signals, not a check pass rate

All 4 safety checks passed (Oct 16, 2026).

Blacklist / threat feeds
Threat-feed coverage is not attached for this domain yet.

Visit website

Evidence and details

The Authority/Safety methodology, live trust checks, and infrastructure context behind the answer above.

Trust checks

Current public signals checked for this report.

DNSgood

1 record

The domain resolves through public DNS.

Source: AboutUs public DNS lookup

HTTPSgood

Reachable

The website responded over HTTPS. Checked HTTPS host: www.purplemath.com.

Source: AboutUs live HTTPS response

HTTPS destinationunknown

www.purplemath.com

HTTPS request for purplemath.com ended at www.purplemath.com. This host is within the profile domain. This records the response destination, not an HTML canonical declaration or a configuration diagnosis.

Source: AboutUs live HTTPS response

Page metadatagood

Free and clear online algebra help! | Purplemath

Free online lessons, loads of worked examples, clear and practical explainations, and no-nonsense advice. Purplemath is here to help!

Source: AboutUs live HTTPS response

Security headersgood

3/3 present

Checks for HSTS, Content-Security-Policy, and X-Frame-Options headers.

Source: AboutUs live HTTPS response

Breach historygood

No breaches on record

Have I Been Pwned has no catalogued breaches for this domain. Absence of a record is not a guarantee that no breach occurred.

Source: Have I Been Pwned

How this report is built— Authority/Safety methodology, Open PageRank attribution, confidence

Authority and safety snapshot

Authority and safety signals are useful with limits

This report combines public evidence source, live checks, freshness, and ownership status so readers can evaluate the website without treating the score as a popularity rank.

Authority —ClearCoverage shown; confidence not calibrated

Authority basis: Strong profile signal; Legacy AboutUs archive import; crawler quality is 87/100. No authority score is published yet from report-derived and stored evidence inputs. External evidence used: Tranco rank, Open PageRank, RDAP age, DMARC, MX. Missing external inputs: Threat feed.
Safety band: Clear · Safety 90/100; Model band: Clear. No current live trust check is producing a warning in this report. New or unclaimed status is not treated as unsafe by itself, and absence of external threat-feed data is not treated as a clean bill of health.

For the site owner— report score, findings, roadmap, print & download

Report score

89/100

Strong website report

Launch state

Search eligible

Eligible for launch indexing

Owner status

Claimable

No owner has verified domain control for this profile yet. Crawler and archive evidence remain visible, and official facts should be submitted through review.

Search visibility

Indexable public profile

This crawler-backed profile passed the public publication gate.

Report summary

Owner improvements available

Moderate report issues can be improved with verified owner facts, fresh crawler evidence, or corrected profile details.

0 high2 medium0 low

Report findings

What should improve before this profile becomes a stronger launch or owner asset.

mediumOwner must doNo verified owner controls this profile
Claim and verify this profile to turn public crawler data into an owner-confirmed trust record.
Verify ownership
The website owner needs to prove domain control with DNS before AboutUs treats owner facts as official.
Unlocks: Owner-controlled edits, verified status, stronger launch confidence, and paid owner setup.
Start owner claim
mediumAboutUs can doProfile data may be stale
The last stored crawl or profile update was 104 days ago.
Refresh the report
AboutUs can recrawl and compare current public signals, then keep owners informed when important facts change.
Unlocks: Fresh report evidence, useful monitoring alerts, and more confidence in downloaded snapshots.
Request monitoring or recrawl

Owner roadmap

The recommended path from public report to verified owner value.

1Claim and verify your domain for freeNextOwner access stays free. Complete DNS proof before subscribing to monitoring for this domain.Submit factual corrections for review and keep the public record accurate.Claim profile
2Review: No verified owner controls this profileLaterClaim and verify this profile to turn public crawler data into an owner-confirmed trust record.Check the evidence and submit a correction when the report is inaccurate.Suggest corrected facts
3

Trust checks

Current public signals checked for this report.

DNSgood

1 record

The domain resolves through public DNS.

Source: AboutUs public DNS lookup

HTTPSgood

Reachable

The website responded over HTTPS. Checked HTTPS host: www.purplemath.com.

Source: AboutUs live HTTPS response

HTTPS destinationunknown

www.purplemath.com

Source: AboutUs live HTTPS response

Page metadatagood

Free and clear online algebra help! | Purplemath

Free online lessons, loads of worked examples, clear and practical explainations, and no-nonsense advice. Purplemath is here to help!

Source: AboutUs live HTTPS response

Security headersgood

3/3 present

Checks for HSTS, Content-Security-Policy, and X-Frame-Options headers.

Source: AboutUs live HTTPS response

Breach historygood

No breaches on record

Have I Been Pwned has no catalogued breaches for this domain. Absence of a record is not a guarantee that no breach occurred.

Source: Have I Been Pwned

purplemath.com

Website report: review the evidence and ownership status

Evidence and details

Trust checks

Authority and safety signals are useful with limits

Owner improvements available

Report findings

Owner roadmap

Website report: review the evidence and ownership status

Trust checks

Authority and safety signals are useful with limits

Owner improvements available

Report findings

Owner roadmap

Claim the report

Optional website monitoring