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Zearn

zearn.org

Scanned Fresh925 checks

100OF 100
How it adds up →
In its own wordsLooks like: School or universityLogin | Zearn MathLearning with Zearn helps math make sense. Students learn math with pictures, visual models, and real-life examples. Log in to your Zearn account.
PopularityTop 10KBuilt withRuby on Rails, Heroku16 technologies foundTrust signals2 of 2 found7 couldn’t be checkedBuilt with AI? None foundNo traces found

Zearn (zearn.org) looks like a school or university site, is ranked in the top 10,000 sites and was registered in 2011. It is built with Ruby on Rails and Heroku; we found no traces of an AI site builder.

The page shows little text before JavaScript runs. Sites drawn by JavaScript show fewer signals until we can render them in a browser.

Popularity

Website Traffic Checker

Among the top 10K sites.

A popularity band, not a visit count.

Tranco: #8,063 · Chrome UX Report: Top 5,000 · Majestic Million: #228,120

Each list, with its date
SourceSaysAs of
TrancoA research ranking that combines several traffic and link sources, published daily.#8,063list of 7 Oct 2026
Chrome UX ReportRank buckets from Google’s real Chrome traffic, published monthly.Top 5,000Aug 2026
Majestic MillionRanks sites by how many separate networks link to them (links, not visits), published daily. CC BY 3.0#228,120list of 8 Oct 2026

Technology

Tech Stack Checker

Built with Ruby on Rails and Heroku.

  • Ruby on RailsFrameworkShow evidenceHide evidence
    Evidence · page source, line 210
    <meta name="csrf-param" content="authenticity_token">
    Popular sites using Ruby on Rails Is this wrong? Report it
  • HerokuHostingShow evidenceHide evidence
    Evidence · response header
    via: 2.0 heroku-router
    Popular sites using Heroku Is this wrong? Report it
Everything else it uses (14)

Around it: CDN, DNS, Email, Marketing and more.

Business tools can stay listed after a site stops using them.

Trust signals

Website Trust Checker

2 of 2 trust signals found on the home page.

Signals, not a judgement: missing details are common on small, honest sites.

  • Domain registered30 Jul 2011, 15 years agoNoted
  • HTTPSLoads over HTTPS with a valid certificateFound
  • Contact detailsIn structured dataFound
    Show evidenceHide evidence
    Exhibit 1 · page source, line 151Masked for privacy. An email address or phone number can belong to a person, and data protection law, such as the EU’s GDPR, asks us to keep only what we need: that the page lists one, and where.
    "email": "s•••@zearn.org"
    Is this wrong? Report it
  • Security filterNot blocked by Cloudflare’s security filter and Quad9’s security filterNoted
Every signal we looked at

On the site

  • Contact pageThe page shows little text before its JavaScript runsCouldn’t check
  • About pageThe page shows little text before its JavaScript runsCouldn’t check
  • Privacy policyThe page shows little text before its JavaScript runsCouldn’t check
  • TermsThe page shows little text before its JavaScript runsCouldn’t check
  • Refund or returns policyThe page shows little text before its JavaScript runsCouldn’t check
  • Contact detailsIn structured dataFound
    Show evidenceHide evidence
    Exhibit 1 · page source, line 151Masked for privacy. An email address or phone number can belong to a person, and data protection law, such as the EU’s GDPR, asks us to keep only what we need: that the page lists one, and where.
    "email": "s•••@zearn.org"
    Is this wrong? Report it
  • Company detailsName: Zearn, address givenFound
  • Payment providersThe page shows little text before its JavaScript runsCouldn’t check
  • TrackersThe page shows little text before its JavaScript runsCouldn’t check

Behind the site

  • Security filterNot blocked by Cloudflare’s security filter and Quad9’s security filterNotedCloudflare’s security filter and Quad9’s security filter
  • Domain registered30 Jul 2011, 15 years agoNoteddomain registry
  • HTTPSLoads over HTTPS with a valid certificateFound
  • Protective settings5 of 6 in placeFound
  • Email protectionProtected against forged emailFoundDNS records

A second opinion on its security setup: Mozilla’s HTTP Observatory grades the site when you open it. Ten checks before you buy · A signal looks wrong? Report it

What it is

Website Summary

Looks like: School or university.

In its own wordsLogin | Zearn MathLearning with Zearn helps math make sense. Students learn math with pictures, visual models, and real-life examples. Log in to your Zearn account.

Our reading of the page, medium confidence.

Show evidenceHide evidence
Exhibit 1 · structured data
"@type": "EducationalOrganization"
Is this wrong? Report it

Who is behind it

  • structured dataZearn
  • WikidataZearn

Confirmed by 2 independent sources: structured data and Wikidata.

Wikidata: Based in New York City, United States.

Show evidence (2)Hide evidence
Exhibit 1 · page source, line 151
"name": "Zearn"
Exhibit 2 · Wikidata
Q117012754: Zearn
Is this wrong? Report it

Each name is quoted from its source. A brand and the company that owns it often go by different names.

More about it: Wikidata, profiles, AI use, page facts

In Wikidata

  • Zearn: Zearn is a nonprofit organization that develops and provides a digital math learning platform for K–8 students. The platform is used in classrooms across the U.S. to support math instruction and practice. · publishing house · since 2012

Wikidata, the free knowledge base behind Wikipedia, lists this domain as the official website of this item. Volunteers write it; each item shows its sources.

AI use

  • AI training: doesn’t ask AI training crawlers to stay away.
  • AI assistants: may read it for the people who ask them.

What its robots.txt and robots tags ask of AI crawlers. Each crawler chooses whether to follow it.

Site name
Zearn
Language
English (en-US)
What it tells search engines
Organization, EducationalOrganization

Named in its structured data

  • OrganizationZearnNew York, US

Read from what the page says about itself; we haven’t checked whether it’s true.

Built with AI?

AI Website Detector

No AI builder traces found.

Coding tools such as Cursor leave no traces, so this doesn’t mean a person made it.

AI traces: None found

How we know

AI site builders leave traces in the sites they make. We look for the traces of 53 of them and show every match with the line it came from, so you can check it yourself.

We test this on 2,312 sites whose makers we know, and publish what we get wrong.

How we test it · Every builder we know · How to tell if a site was built with AI

Score breakdown

Site Score

100 of 100: strong trust signals.

How established and checkable it is; AI traces carry no weight.

100OF 100
TransparencyContact, policies and about page4 / 4
Track recordHow long the domain has existed25 / 25
PopularityIts place in public rankings20 / 20
Security and setupHTTPS and standard protections15 / 15
ConsistencyName, description and what it tells search engines10 / 10
Why each part scored what it did
TransparencyContact, policies and about page4 / 4contact page link: couldn’t check · email and phone given · privacy policy link: couldn’t check · terms link: couldn’t check · refund policy link: couldn’t check · about page link: couldn’t check
Track recordHow long the domain has existed25 / 25domain registered 15 years ago
PopularityIts place in public rankings20 / 20Top 10K in a popularity list
Security and setupHTTPS and standard protections15 / 15loads over HTTPS · sends visitors to HTTPS · always uses HTTPS · protective settings
ConsistencyName, description and what it tells search engines10 / 10site name matches the domain · describes itself · tells search engines what it is

A high score isn’t a promise that a business is honest. How the score works.

Domain history

Domain History

Registered in 2011.

  1. Domain registeredRDAP
  2. This scanCheckAnySite

The web archive couldn’t be reached; we’ll ask it again. Why can this be empty?

Changes, earlier scans and alerts
Since our previous scan
This is our first scan of the site.

How we scanned it

Only from what anyone can see: the site’s public pages and public records.

  • Politely. Our scanner, CheckAnySiteBot, says who it is and follows the site’s robots.txt.
  • With sources. Every fact above says where it came from and when.
  • Without guessing. When we couldn’t check something, we say so.
This scan, in numbers

925 checks on 20 Oct 2026, with version 0.5.0 of our checks and version 1.1 of the score.

How we work · What each version changed · About our scanner

Quick look

Built with AI?

None foundWe found no AI builder traces.

“None found” never means “made by a person”: coding assistants leave no traces.

All the evidence →

Related

Quick look

How popular is it?

Top 10KBy the best of 3 public lists.

  • Tranco#8,063list of 7 Oct 2026
  • Chrome UX ReportTop 5,000Aug 2026
  • Majestic Million#228,120list of 8 Oct 2026

A popularity band, never a visit count.

The popularity section →

Related

Quick look

What is it built with?

Framework
Ruby on Rails
Hosting
Heroku

And 14 more around it (CDN, DNS, Email, Marketing), in the section.

Each with its evidence →

Related

Quick look

Which trust signals does it show?

On the site

  • Contact pageCouldn’t check
  • About pageCouldn’t check
  • Privacy policyCouldn’t check
  • TermsCouldn’t check
  • Refund or returns policyCouldn’t check
  • Contact detailsFound
  • Company detailsFound
  • Payment providersCouldn’t check
  • TrackersCouldn’t check

Behind the site

  • Security filterNoted
  • Domain registeredNoted
  • HTTPSFound
  • Security headersFound
  • Software versionsNoted
  • NetworkNoted
  • Email setupFound
  • First certificateCouldn’t check
  • DNSSECNot found
  • Certificate authoritiesNot found
  • Security contactNot found

Signals, not a judgement: missing details are common on small, honest sites.

Every signal with its source →

Related

How has it changed? →
Quick look

How does it add up?

100OF 100

Strong trust signals. An open formula (v1.1): every point comes from a finding above. AI traces carry no weight.

TransparencyContact, policies and about page4 / 4
Track recordHow long the domain has existed25 / 25
PopularityIts place in public rankings20 / 20
Security and setupHTTPS and standard protections15 / 15
ConsistencyName, description and what it tells search engines10 / 10
Why each part scored what it did →

Related

Questions about zearn.org

What is zearn.org?

Zearn describes itself: “Learning with Zearn helps math make sense. Students learn math with pictures, visual models, and real-life examples. Log in to your Zearn account.” It looks like a school or university site. See the evidence

How old is zearn.org?

Its domain was registered on 30 Jul 2011, 15 years ago. See the evidence

What is zearn.org built with?

It is built with Ruby on Rails and Heroku; we found 16 technologies in all. See the evidence

How popular is zearn.org?

It is among the top 10,000 sites, by Tranco, Chrome UX Report and Majestic Million. See the evidence

Was zearn.org made with AI?

We found no traces of an AI site builder. That doesn’t prove a person built it: AI coding assistants leave no traces. See the evidence

Who is behind zearn.org?

Zearn, named by its structured data and Wikidata. See the evidence

More sites like this: school or university

Automated findings from the site’s public home page and public records, as of 20 Oct 2026. They describe what we found, not the people or business behind the site, and they may be incomplete or out of date. This is information, not advice. Terms · Report an error

What this scan can’t tell you
  • Whether the business is real, honest or delivers what it sells.
  • Whether a site was made with AI when no traces were left: coding assistants and hand edits leave none.
  • How many people visit: we show popularity bands from public lists, not visits.
  • Anything beyond the home page as it was at the time of the scan.

Is this your site? Ask for a correction.

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The result describes what we found on 20 Oct 2026, with evidence.

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One scan answers everything: AI traces, popularity, technology, trust signals, how the site describes itself, a score and its history. A quick check only decides which answer comes first. We read public pages as CheckAnySiteBot and follow robots.txt.