Website readiness profile · Snapshot 23 October 2026

semrush.com

semrush.com's public homepage, certificate and DNS checked against 31 practices and compared with 87 SEO & Email Marketing sites.

Readiness index: 85/100
Ahead of: 92%
Practices observed: 24/31
Popularity band: Top 10K

Measured 2026-10-23 12:10:10 UTC from one location. How we measure

Readiness by lane

Green: semrush.com. Thin bar: SEO & Email Marketing peer median.

Enable

95/100

Peers 77

Harden

80/100

Peers 55

Accelerate

88/100

Peers 66

Recover

0/100

Peers 3

Priority fixes for semrush.com

Ordered by impact and by how common each practice is among peers.

Priority 1 · Accelerate
No render-blocking scripts in <head>
Observed: The homepage <head> loaded 7 external scripts without async or defer.
Why it matters: A plain <script src> in the head stops the browser from showing anything until that file has downloaded and run.
What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.
56% of SEO & Email Marketing peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.
Guide: Control Third-Party Scripts Before They Control Your Page
Priority 2 · Harden
Content Security Policy present
Observed: The homepage response did not include a Content-Security-Policy header.
What to do: Start with Content-Security-Policy-Report-Only to see what would break, tighten the policy over a few weeks, then enforce it.
27% of SEO & Email Marketing peers do this.
Guide: Payment Security and PCI DSS: What Website Owners Need to Know
Priority 3 · Harden
security.txt published
Observed: No valid /.well-known/security.txt with a Contact field was returned.
What to do: Publish /.well-known/security.txt with at least Contact and Expires fields, as RFC 9116 requires, and review it before it expires.
8.4% of SEO & Email Marketing peers do this.
Guide: A Practical Website Health Check for Owners
Priority 4 · Enable
Reachable over IPv6
Observed: No IPv6 (AAAA) address was published for www.semrush.com.
What to do: Enable IPv6 at your CDN or host and publish the AAAA record it provides.
55% of SEO & Email Marketing peers do this.
Guide: How to Evaluate Web Hosting Performance

What semrush.com already does well

Practices fewer than half of SEO & Email Marketing peers use.

CAA records limit who can issue certificatesCAA limits issuance to amazon.com, comodoca.com, digicert.com and others.20% of peers
HSTS kept for at least a yearHSTS with a 365-day max-age covering subdomains.36% of peers
DMARC policy enforces quarantine or rejectDMARC policy p=quarantine.37% of peers

What we saw

Homepage checked: https://www.semrush.com/
Homepage response: HTTP 200
TLS: TLSv1.3, HTTP/2
Certificate: Google Trust Services, 90-day validity, expiring 2026-12-14
CDN or edge: Google edge
DNS operators: Google Cloud DNS
HSTS: max-age 365 days, includeSubDomains, preload
DMARC policy: p=quarantine
Homepage HTML: 191 KB, br
Images on homepage: 54 (svg 53, webp 33, png 1)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

Google edge (cdn and edge platform)Google Cloud DNS (dns operator)Google Trust Services (certificate authority)Service guide: Google Cloud

All 31 checks

Select a gap for the method and fix. How each check works

Not observed 7

Observed 24

HTTP requests move to HTTPS
HSTS kept for at least a year
TLS 1.3 negotiated
Certificate has more than 14 days left
Certificate lifetime of 100 days or less
CAA records limit who can issue certificates
DMARC policy enforces quarantine or reject
X-Content-Type-Options: nosniff
Framing restricted
HTTP/2 negotiated
HTTP/3 advertised
HTML compressed
Static files cached for 30 days or more
Modern image formats in use
Offscreen images lazy-loaded
robots.txt published
XML sitemap discoverable
Canonical URL declared
Meta description written
Mobile viewport configured
Structured data present
Social preview image set
Page language declared
At most one redirect to the homepage

Own semrush.com?

Re-run the checks after a change, keep a private action plan in a free workspace, or report a mistake.

Re-check semrush.com now Add to owner workspace Request a correction or removal

Live status for this site: Status Is Down: semrush.com. This profile covers configuration only.

Compare with other SEO & Email Marketing sites

SEO & Email Marketing readiness benchmark