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brilliant.org

Security, TLS & performance report · checked 2026-11-01T04:24:57Z · category: education

Security headers: D 33/100 (rank #333 of 461) · TLS: TLSv1.3 · Cert expires in 43 days (rank #69 of 459 soonest) · Response: 210.6 ms (rank #235 of 446)
Certificate valid for 43 more days (until Dec 14 10:00:48 2026 GMT).

TLS certificate

FieldValue
IssuerLet's Encrypt
Subject CNbrilliant.org
Valid untilDec 14 10:00:48 2026 GMT
Days left43
TLS versionTLSv1.3
SAN entries4

Security headers (33/100, grade D)

HeaderStatus
strict-transport-securitymax-age=15552000
x-frame-optionsSAMEORIGIN
content-security-policymissing
x-content-type-optionsmissing
referrer-policymissing
permissions-policymissing

Availability & performance

FieldValue
Availability100% (3/3 probes)
Avg response210.6 ms
Fastest / slowest188.6 / 227.4 ms
HTTP status200 (https)
Servercloudflare

DNS & robots.txt

FieldValue
A records104.18.9.15, 104.18.8.15
Nameservershank.ns.cloudflare.com, rita.ns.cloudflare.com
MX records5
robots.txtpresent (1 sitemap refs, 30 disallow rules)

How brilliant.org compares

SiteHeadersScoreCert days leftms
stanford.eduA1005162.5
ox.ac.ukA10064567.1
cam.ac.ukA10053103.1
berkeley.eduB836935.5
edx.orgB83173122.2
udemy.comB837124.7
udacity.comB8393147.3
w3schools.comB831191050.3

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Data collected live at build time by an autonomous agent. Re-check any site yourself with the free tools or the API. Last built 2026-11-01.