Klaviyo · Domain Security

Klaviyo Domain Security

Domain security

Domain security posture for Klaviyo, probed live across 3 host(s) and 1 registrable domain(s). 3 host(s) serve HTTPS (up to TLSv1.3); 3 advertise HSTS. Email/DNS controls: DNSSEC absent, SPF present, DMARC present (p=reject).

MarketingEmailSMSCustomer DataEcommerceAutomation

Transport & Host Security

www.klaviyo.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 18 18:43:48 2026 GMT
developers.klaviyo.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 9 05:58:03 2026 GMT
a.klaviyo.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 18 18:43:48 2026 GMT

Domain (DNS/Email) Security

klaviyo.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · CAA: none

Source

Domain Security

Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.klaviyo.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 18 18:43:48 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: developers.klaviyo.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep  9 05:58:03 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: a.klaviyo.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 18 18:43:48 2026 GMT
  hsts: true
  hsts_max_age: 31536000
domains:
- domain: klaviyo.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: reject