Voice Brand Check

Detection approach

Speech Synthesis Voice Brand mismatch. Operating system voice libraries (speechSynthesis.getVoices()) contained voice packages belonging to a different platform (e.g. Microsoft-branded voices present while claiming a macOS environment). Real consumer platforms only ship native OS voices, exposing headless server setups or incorrect User-Agent configurations.

How this helps detect bots

This signal is assessed with other independent session, browser, and network evidence. A single anomaly is a lead, not a verdict; corroborating anomalies make automated traffic more likely.

Legitimate traffic to consider

None. Consumer operating systems ship with platform-native text-to-speech voice packs.