Website safety reportLast scanned Jun 18, 2026

Is Zearn Safe?

Ads, Trackers, Security & UX Review

6 public pages rendered. The score, signal cards, and evidence tables below show what appeared in the browser sample.

Status

Scan completed

Host

zearn.org

Confidence

72/100

Observed safety score

Elevated observed risk

Ad risk: High

36/ 100

Signal mix

Weak

AdsHigh

TrackingHigh

SecurityModerate-low

Ad domains

Tracker domains

72/100

Confidence

Host

zearn.org

Education and student tools

Hosting

AMAZON-02 - Amazon.com, Inc., US

15.197.149.68; AS16509

TLS

Enabled

Sectigo Limited

Requests

442

22 third-party domains observed

Risk map

What the scan noticed

Four quick signals first. Evidence stays grouped by risk area.

High

Data risk

Tracking signals

High

Ad risk

Ad pressure

Moderate-low

Security posture

Baseline checks

Moderate-low

User experience

Low friction

Data risk22 3rd-party domains seen.High

Meaning

The rendered scan observed 21 tracker-domain matches, led by d33atdio81inpg.cloudfront.net (319), cdn.prod.website-files.com (15), google.com (11) and 18 more, and up to 18 cookies across the sampled public pages.

Evidence

22 3rd-party domains seen.
21 tracker-domain matches were classified as known tracker patterns in the browser sample.
18 total cookies and 8 3rd-party cookies seen.
The enrichment pass did not discover privacy, terms, help, safety, or opt-out style links.
The enrichment sample did not surface obvious cookie/tracking language in extracted text.

Ad risk4 ad-domain matches were classified as known ad-network patterns in the browser sample.High

Meaning

The rendered scan observed 4 ad-domain matches across 6 sampled public pages, led by googleads.g.doubleclick.net (2), stats.g.doubleclick.net (2), ad.doubleclick.net (1) and 1 more.

Evidence

4 ad-domain matches were classified as known ad-network patterns in the browser sample.
442 browser requests seen.
1 static script domain seen across the enrichment sample.
No pop-up window calls seen in the automated pass.

Security postureCSP header seen.Moderate-low

Meaning

Security posture is based on observed TLS, response headers, mixed-content behavior, and usable external-check output.

Evidence

CSP header seen.
TLS connected with TLSv1.3; issuer: Sectigo Limited.
HSTS header seen.
X-Frame header seen.
No mixed-content requests seen in the rendered browser sample.
Structured-data types observed during enrichment: EducationalOrganization, Organization.

User experienceNo notification permission prompts seen.Moderate-low

Meaning

The rendered public-page sample loaded with HTTP 200 and 19913 visible text characters.

Evidence

No notification permission prompts seen.
19913 rendered text characters seen.
Fetched page returned HTTP 200.
Sampled page titles: Login | Zearn Math.

Evidence

Scan evidence at a glance

Key signals first, with important limits kept close so the report stays useful without overstating certainty.

Captured evidence

Direct observations

Pages sampled

Rendered browser pass

442

Requests

22 third-party - 4 ad - 21 tracker

8 third-party

Headers

Security posture

HSTS yes - CSP yes - X-Frame yes

Below

Request volume

442 vs 628 median

Seen

Evidence

Third-party domain count was below the same-cluster...

Seen

Evidence

Tracker-domain count was below the same-cluster med...

Scan boundary

Important limits

Can vary

School context

Policy, consent, paid features

Can change

Ad context

Location, consent, A/B tests

External checks

Source signals

Clear

Safe Browsing

Google Transparency Report Safe Browsing status returned no threat matches for 1 URL

Flagged

HTTP Observatory

MDN HTTP Observatory returned grade B- with score 65 and 3 failed checks

Ads and trackers

Ads and trackers found in the scan

Observed domains are grouped by company or tool, purpose, request volume, and the sampled pages where they appeared.

Entities

Companies or tools grouped from observed domains.

Activity by purpose

Grouped by evidence

Tracking and measurement

7 entities / 12 domains

361

Advertising

2 entities / 4 domains

Tag management

1 entity / 1 domain

Analytics

2 entities / 3 domains

Social tracking

2 entities / 3 domains

Performance monitoring

1 entity / 2 domains

Top observed entities

Amazon.com

Tracking and measurement

tracker

320

requests

5/6

pages

d33atdio81inpg.cloudfront.netd3e54v103j8qbb.cloudfront.net16% web prevalence

Google

Tracking and measurement

tracker

requests

1/6

pages

ad.doubleclick.netgoogle.comgoogleads.g.doubleclick.net+146% web prevalence

Website Files

Tracking and measurement

tracker

requests

1/6

pages

cdn.prod.website-files.com0.6% web prevalence

Rudderlabs

Tracking and measurement

tracker

requests

5/6

pages

api.rudderlabs.com0.2% web prevalence

Google

Advertising

requests

1/6

pages

ad.doubleclick.netgoogleads.g.doubleclick.netstats.g.doubleclick.net

Google

Tag management

tracker

requests

1/6

pages

googletagmanager.com59% web prevalence

Ad-domain evidence

Raw domains and request paths classified as ad-network matches in rendered samples.

domains

classified requests

pages with matches

googleads.g.doubleclick.net

Matched known ad-network patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: script.

2 requests

Seen in sample

1 sampled page

Request types

script

Matched hosts

googleads.g.doubleclick.net

Domain matched known ad-network patterns.

stats.g.doubleclick.net

Matched known ad-network patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: ping.

2 requests

Seen in sample

1 sampled page

Request types

ping

Matched hosts

stats.g.doubleclick.net

Domain matched known ad-network patterns.

ad.doubleclick.net

Matched known ad-network patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: fetch.

1 request

Seen in sample

1 sampled page

Request types

fetch

Matched hosts

ad.doubleclick.net

Domain matched known ad-network patterns.

static.ads-twitter.com

Matched EasyList ad-network patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: script.

1 request

Seen in sample

1 sampled page

Request types

script

Matched hosts

static.ads-twitter.com

Domain matched EasyList ad-network patterns.

Tracker-domain evidence

Raw domains and request paths classified as tracker matches in rendered samples.

domains

377

classified requests

pages with matches

d33atdio81inpg.cloudfront.net

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 5 rendered pages. Request types: script, stylesheet. Classified owner: Amazon.com. Tracker owner: Amazon.com.

319 requests

Seen in sample

5 sampled pages

Request types

scriptstylesheet

Context

Owner: Amazon.comPrevalence: 16%

Matched hosts

d33atdio81inpg.cloudfront.net

Domain matched DuckDuckGo Tracker Radar tracker data for Amazon.com.

cdn.prod.website-files.com

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: stylesheet, image, script, font.

15 requests

Seen in sample

1 sampled page

Request types

stylesheetimagescriptfont

Context

Prevalence: 0.6%

Matched hosts

cdn.prod.website-files.com

Domain matched DuckDuckGo Tracker Radar tracker patterns.

google.com

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: fetch, image.

11 requests

Seen in sample

1 sampled page

Request types

fetchimage

Context

Prevalence: 46%

Matched hosts

google.com

Domain matched DuckDuckGo Tracker Radar tracker patterns.

api.rudderlabs.com

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 5 rendered pages. Request types: xhr.

5 requests

Seen in sample

5 sampled pages

Request types

xhr

Context

Prevalence: 0.2%

Matched hosts

api.rudderlabs.com

Domain matched DuckDuckGo Tracker Radar tracker patterns.

googletagmanager.com

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: script.

5 requests

Seen in sample

1 sampled page

Request types

script

Context

Prevalence: 59%

Matched hosts

googletagmanager.com

Domain matched DuckDuckGo Tracker Radar tracker patterns.

analytics.google.com

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: fetch, ping.

2 requests

Seen in sample

1 sampled page

Request types

fetchping

Context

Prevalence: 46%

Matched hosts

analytics.google.com

Domain matched DuckDuckGo Tracker Radar tracker patterns.

bam.nr-data.net

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: xhr.

2 requests

Seen in sample

1 sampled page

Request types

xhr

Context

Prevalence: 2.4%

Matched hosts

bam.nr-data.net

Domain matched DuckDuckGo Tracker Radar tracker patterns.

connect.facebook.net

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: script. Classified owner: Facebook. Tracker owner: Facebook.

2 requests

Seen in sample

1 sampled page

Request types

script

Context

Owner: FacebookPrevalence: 19%

Matched hosts

connect.facebook.net

Domain matched DuckDuckGo Tracker Radar tracker data for Facebook.

googleads.g.doubleclick.net

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: script.

2 requests

Seen in sample

1 sampled page

Request types

script

Context

Prevalence: 45%

Matched hosts

googleads.g.doubleclick.net

Domain matched DuckDuckGo Tracker Radar tracker patterns.

munchkin.marketo.net

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: script. Classified owner: Adobe. Tracker owner: Adobe.

2 requests

Seen in sample

1 sampled page

Request types

script

Context

Owner: AdobePrevalence: 0.5%

Matched hosts

munchkin.marketo.net

Domain matched DuckDuckGo Tracker Radar tracker data for Adobe.

stats.g.doubleclick.net

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: ping.

2 requests

Seen in sample

1 sampled page

Request types

ping

Context

Prevalence: 45%

Matched hosts

stats.g.doubleclick.net

Domain matched DuckDuckGo Tracker Radar tracker patterns.

056-qzc-375.mktoresp.com

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: ping. Classified owner: Adobe. Tracker owner: Adobe.

1 request

Seen in sample

1 sampled page

Request types

ping

Context

Owner: AdobePrevalence: 0.5%

Matched hosts

056-qzc-375.mktoresp.com

Domain matched DuckDuckGo Tracker Radar tracker data for Adobe.

ad.doubleclick.net

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: fetch.

1 request

Seen in sample

1 sampled page

Request types

fetch

Context

Prevalence: 45%

Matched hosts

ad.doubleclick.net

Domain matched DuckDuckGo Tracker Radar tracker patterns.

analytics.twitter.com

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: ping.

1 request

Seen in sample

1 sampled page

Request types

ping

Context

Prevalence: 3.9%

Matched hosts

analytics.twitter.com

Domain matched DuckDuckGo Tracker Radar tracker patterns.

cdn.jsdelivr.net

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: script.

1 request

Seen in sample

1 sampled page

Request types

script

Context

Prevalence: 13%

Matched hosts

cdn.jsdelivr.net

Domain matched DuckDuckGo Tracker Radar tracker patterns.

d3e54v103j8qbb.cloudfront.net

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: script. Classified owner: Amazon.com. Tracker owner: Amazon.com.

1 request

Seen in sample

1 sampled page

Request types

script

Context

Owner: Amazon.comPrevalence: 16%

Matched hosts

d3e54v103j8qbb.cloudfront.net

Domain matched DuckDuckGo Tracker Radar tracker data for Amazon.com.

facebook.com

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: image. Classified owner: Facebook. Tracker owner: Facebook.

1 request

Seen in sample

1 sampled page

Request types

image

Context

Owner: FacebookPrevalence: 17%

Matched hosts

facebook.com

Domain matched DuckDuckGo Tracker Radar tracker data for Facebook.

google-analytics.com

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: script.

1 request

Seen in sample

1 sampled page

Request types

script

Context

Prevalence: 39%

Matched hosts

google-analytics.com

Domain matched DuckDuckGo Tracker Radar tracker patterns.

js-agent.newrelic.com

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: script.

1 request

Seen in sample

1 sampled page

Request types

script

Context

Prevalence: 2.4%

Matched hosts

js-agent.newrelic.com

Domain matched DuckDuckGo Tracker Radar tracker patterns.

static.ads-twitter.com

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: script.

1 request

Seen in sample

1 sampled page

Request types

script

Context

Prevalence: 2.4%

Matched hosts

static.ads-twitter.com

Domain matched DuckDuckGo Tracker Radar tracker patterns.

t.co

Matched DuckDuckGo Tracker Radar tracker patterns during the rendered public-page sample. Observed on 1 rendered page. Request types: ping.

1 request

Seen in sample

1 sampled page

Request types

ping

Context

Prevalence: 2.4%

Matched hosts

t.co

Domain matched DuckDuckGo Tracker Radar tracker patterns.

Alternatives

Zearn alternatives to compare before choosing

These options are category-relevant comparison leads for Zearn. Each card separates why it is comparable and when it fits.

Gimkit

gimkit.com

Visit

Why compare it

Gimkit is in the education and student tools category and has rendered scan evidence, making it useful for comparing ads, trackers, cookies, and security posture.

Best fit

Use it as a comparison point when you want another option with lower observed risk in the same evidence categories.

Scan-backed comparison

Ads: LowData: ElevatedSecurity: Moderate

Blooket

blooket.com

Visit

Why compare it

Blooket is in the education and student tools category and has rendered scan evidence, making it useful for comparing ads, trackers, cookies, and security posture.

Best fit

Use it as a comparison point when you want another option with lower observed risk in the same evidence categories.

Scan-backed comparison

Ads: LowData: ElevatedSecurity: Elevated

ClassLink

classlink.com

Visit

Why compare it

ClassLink is in the education and student tools category and has rendered scan evidence, making it useful for comparing ads, trackers, cookies, and security posture.

Best fit

Use it as a comparison point when you want another option with lower observed risk in the same evidence categories.

Scan-backed comparison

Ads: ElevatedData: HighSecurity: Moderate-low

Kiddle

kiddle.co

Visit

Why compare it

Kiddle is in the education and student tools category and has rendered scan evidence, making it useful for comparing ads, trackers, cookies, and security posture.

Best fit

Use it as a comparison point when you want another option with a similar observed-risk range in the same evidence categories.

Scan-backed comparison

Ads: ModerateData: ElevatedSecurity: High

FAQs

Zearn safety questions answered

Is Zearn safe to use?

Latest scan of Zearn across 6 public pages captured 442 browser requests, 22 third-party domains, 4 ad-domain matches, 21 tracker-domain matches, and 18 cookies (8 third-party). Core header checks were present. External checks: Safe Browsing clear; HTTP Observatory flagged. This is not a guarantee of safety; it is a time-bound public-page evidence report.

What did Blockify actually observe on Zearn?

Key observations from the rendered sample: 442 browser requests, 22 third-party domains, 4 ad-domain matches, 21 tracker-domain matches, and 8 third-party cookies. Core header checks were present.

Does Zearn use ads or trackers?

The rendered public-page scan found 4 ad-domain matches and 21 tracker-domain matches across 6 sampled pages. The most active matches were d33atdio81inpg.cloudfront.net (319), cdn.prod.website-files.com (15), google.com (11) and 18 more.

What should schools check before using Zearn?

Use the public-page privacy and security signals here, then compare student-data terms, SSO settings, roster access, retention policy, parent consent, and district controls.

Why does the report show zearn.org instead of another domain?

We tested zearn.org because it is the website address selected for this report.

What should I compare before choosing Zearn alternatives?

Compare the same evidence categories: rendered requests, ad-domain matches, tracker-domain matches, cookies, security headers, external checks, and whether each alternative fits the same user task.

Can Blockify guarantee that this website is safe?

No. Blockify can reduce ads, trackers, and pop-ups in the browser, but no scan can guarantee every page, account flow, future visit, or personalized state is safe.