What technology does Proofpoint run?

Security US Company

CipherCue observes Proofpoint's public-facing infrastructure: its technology stack, hosting geography, DNS and email posture, certificates, and how these change over time.

13 categories of public infrastructure observed, from April 2026 to October 2026.

Hosting observed: AMAZON-AES · US.

Observed technology stack

SaaS & marketing

Marketo

Security

Imperva WAF

A sample of what we observe. Sign up free to see the full stack with versions, DNS and email posture, certificates, and how it has changed over time.

AI crawlers blocked in robots.txt

Proofpoint disallows 1 of 19 known AI crawlers in its robots.txt.

Meta-ExternalAgent · Meta

Primary source: https://proofpoint.com/robots.txt (observed 13 October 2026).

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How this is observed: CipherCue continuously probes the public-facing infrastructure of tracked organisations. All observations are produced from publicly accessible sources only: no authenticated access, no intrusive probing, no third-party data feeds. See the observation methodology for full detail.