semantics 21

The End Of Manual Transcription Starts Here

Spend less time manually reviewing audio and video evidence with S21 Transcriber v2.0 – an offline, rapid and accurate way to turn spoken material into searchable, structured intelligence.

Three New Semantics 21 Investigative Apps

Former UK Police Sergeant Tom Oldroyd demonstrates three focused tools designed to help investigators surface intelligence faster, review media more confidently, and generate structured descriptions without adding extra workload.

Repeated Exposure To Explicit Material Is No Longer Unavoidable

Semantics 21 launches S21 AI Describe, an offline tool that generates structured, detailed descriptions of CSAM and safeguarding imagery in seconds — reducing repeated exposure while preserving investigative clarity and workflow integrity.

In The Age Of Synthetic Media, Authenticity Can No Longer Be Assumed

Semantics 21 has launched S21 Deepfake Detector, an offline tool built from over a year of operational use, enabling investigators to assess manipulated or AI-generated imagery with confidence-based, explainable analysis that supports — not replaces — human judgement.