Are You Here to Hunt Monsters?

Hunt monsters. Rescue victims. Uncover the truth.


Arm yourself with intelligent solutions to accelerate investigations,
from victim identification to video footage review and transcription.

Explore CSAM / ICAC Tools
Explore CCTV & Digital Forensics Tools

Trusted by global law enforcement. Powered by AI. Ready to help you bring monsters to justice.

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Driving smarter, safer digital investigations through AI-powered media review

Automated Solutions

Accelerate categorisation, identification and review with AI-automated workflows tailored to investigators.

#SlashBacklogs

Victim-Centric Approach

Our technology prioritises those who matter most, helping you identify victims faster and more accurately.

#EveryVictimMatters

Wellbeing

Unique built-in wellbeing features support investigator resilience and reduce long-term exposure risk.

#InvestigatorWellbeing

These principles power every S21 product, from triage to victim rescue.

AI-powered categorisation and victim identification tools – trusted by child protection teams worldwide

s21 laseri-x software
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S21 LASERi-X​

Advanced AI solution for categorisation, prioritisation and victim-first investigations.

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s21 discovery software
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S21 Discovery

A frontline triage tool for rapid identification and review, built for lab or field use.

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s21 laseri-x software
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S21 Investigator Wellbeing

The only platform built to monitor and manage exposure risks during sensitive content review.

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S21 Global Alliance Database (GAD)

The world’s largest CSAM intelligence database

Over 3 BILLION records contributed by global law enforcement, including notes, descriptions, and classifications — all designed to reduce manual review and minimise CSAM exposure for investigators.

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Explore our cutting-edge tools for CCTV review, offline transcription, and forensic automation — built for speed, accuracy, and ease of use.

s21 discovery software
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S21 CCTV

AI-enhanced CCTV review, enhancement and reporting, designed for frontline teams and forensic labs alike.

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s21 laseri-x software
S21 Transcriber

S21 Transcriber​

Accurate, secure offline transcription for interviews and phone messages — fast and built for investigative workflows.

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s21 laseri-x software
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S21 AutomateX

Seamlessly automate your X-Ways and S21 workflows, saving hours per case while reducing cost and manual workload.

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Trusted by experts worldwide, don’t just take our word for it

"After switching to Semantics 21, we identified more victims in 10 months than in the previous five years combined. Their team worked closely with us to customise the platform for our workflow and legal requirements."

D/Cst. Frawley, Kingston Police, Canada

"The Semantics 21 team clearly put the customer first. It’s refreshing to feel that we have a company prepared to listen to our individual needs and create solutions which are fit for purpose."

D/Insp Milligan, Merseyside Police, UK

"S21 LASERi-X is a powerful and vital tool to any Digital Forensic Analyst. I highly recommend it to be part of your forensic software toolbox. The S21 Auto-Categoriser quickly identifies the majority of CSAM images in your case and allows the Investigator to streamline the categorization process."

Cst. Fasullo, Chatham-Kent Police, Canada

Switch with ease – free trials, guided migration and rapid onboarding

Get started in minutes. S21’s intuitive design means most users need no formal training – just a few hours to full operational confidence.

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