Daily monitoring · 476 domains

The Fortune 500 Security Report

We continuously scan the public security configuration of the largest U.S. companies. This page tracks who's improving, who's slipping, and how the cohort as a whole is shifting on TLS, headers, and email auth.

Updated Jun 18, 2026 · 30-day rolling window

By the numbers

The cohort at a glance.

A snapshot across all 476 domains from each one's most recent scan.

Median grade

C

across the cohort

Behind a CDN/WAF

49%

233 of 476

Enforce HSTS

45%

215 domains

Ship a CSP

17%

80 domains

Prefer TLS 1.3

88%

420 domains

DNSSEC enabled

18%

84 domains

Grade distribution

How the whole cohort scores, A through F.

A
47 · 10%
B
157 · 33%
C
269 · 57%
D
3 · 1%
F
0 · 0%

Who's behind a CDN / WAF

Detected from response headers · 49% of domains show a known provider.

Cloudflare
78 · 16%
Fastly
45 · 9%
CloudFront
40 · 8%
Google
29 · 6%
Akamai
24 · 5%
Varnish
10 · 2%
Azure
7 · 1%

Header-based detection records one provider per domain, so this undercounts multi-CDN setups and sites that strip identifying headers.

Today's leaders

The best and worst graded right now.

Same grading formula we use on every individual scan: weighted across SSL, HSTS, CSP, headers, TLS strength, cookie security, DMARC, DKIM, DNSSEC, and more.

Top 5 · highest score

1 detik.com 98 A
2 discord.com 98 A
3 gizmodo.com 98 A
4 m.me 98 A
5 archives.gov 96 A

Bottom 5 · lowest score

1 abcnews.go.com 52 D
2 narod.ru 54 D
3 huawei.com 54 D
4 theglobeandmail.com 56 C
5 storage.googleapis.com 56 C

Where would your domain rank?

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Last 30 days

Who moved?

Comparing each domain's current scan to its scan from ~30 days ago. 6 domains changed at least one security feature in that window.

Domains changed

6

Features added

+3

Features lost

−8

ft.com C
Jun 18
HSTS: on → off CSP: on → off WAF detection: off → on
aol.com C
Jun 18
HSTS: on → off CSP: on → off X-Frame-Options: on → off
upenn.edu B
Jun 18
HSTS: off → on X-Frame-Options: off → on
detik.com A
Jun 18
TLS version: TLSv1.2 → TLSv1.3 TLS strength: Medium → Strong
cpanel.net C
Jun 18
HSTS: on → off X-Frame-Options: on → off
nypost.com B
Jun 18
X-Frame-Options: on → off

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