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PerimeterX

PerimeterX

Acquired

San Mateo, California, United States · Founded 2014

201-500 employees · Not Publicly Traded

Sourced & current · updated Oct 11, 2026Website unavailable

PerimeterX was a bot-defense and web application security company that protected websites, apps and APIs from automated attacks and fraud. It merged into HUMAN Security in July 2022.

Where they sit

Stack tier: Extended Ecosystem (D)

Ad Fraud PreventionVerification Platform

A leading bot detection and fraud prevention platform that merged with HUMAN Security in 2022, becoming part of one of the largest bot mitigation companies in the industry.

Ownership

Pre-call brief from ATDb — sourced from the live database, current as of Oct 11, 2026. Not a static screenshot.