Investigator-led forensic intelligence tools designed to help teams review digital evidence faster, prioritise what matters, and reduce unnecessary manual review burden.
CSAM / ICAC and victim identification tools
Tools designed to support victim identification, intelligence development, frontline triage and safeguarding-focused investigative workflows.
Investigators can only act on the evidence they can see
Unsupported formats, failed processing, and evidence that never becomes searchable can create critical blind spots within digital investigations.
Investigators may therefore make decisions without visibility of the full dataset.
S21 tools are designed to reduce those gaps - helping investigative teams review more evidence, surface relevant intelligence faster, and work with greater confidence.
Trusted by investigators handling complex digital investigations
Semantics 21 develops investigator-led forensic intelligence tools for teams working with complex image, video, and digital evidence.
From victim identification and media review to CCTV analysis, transcription, and forensic automation, S21 helps teams surface relevant intelligence earlier - without disrupting existing workflows.
Designed for investigations where speed, clarity, and investigator wellbeing all matter.
These principles power every S21 product, from triage to victim rescue.
Intelligent Automation
Reduce repetitive investigative workflows and accelerate operational review without removing investigator control.
Victim-Centric Approach
Designed to help investigators surface relevant intelligence faster and support safeguarding-focused investigative workflows.
Investigator Wellbeing
Designed to reduce unnecessary exposure to traumatic material and support sustainable investigative practice.
CSAM/ICAC tools
CSAM / ICAC intelligence and victim identification tools
Tools designed to help child protection teams review high volumes of digital evidence, surface relevant intelligence, and support victim identification workflows.
S21 VisionX
S21 VisionX is designed to help investigators review large volumes of image and video evidence, identify visual connections, and prioritise material for further investigative review.
• Large-scale image and video review • Similarity, grouping, and prioritisation • Built for investigator-led workflows
S21 Investigator Wellbeing helps teams monitor exposure patterns, reduce unnecessary contact with traumatic material, and support healthier long-term investigative practices.
Global victim identification intelligence at unprecedented scale.
The S21 Global Alliance Database contains over 3.5 billion law-enforcement-contributed intelligence records from trusted partners worldwide, helping investigators identify victim status, uncover cross-case links, and surface critical investigative intelligence at global scale.
S21 Transcriber supports secure offline transcription of audio and video evidence, helping investigators search, review, and report spoken content without reliance on cloud services.
• Offline audio and video transcription • Search spoken content quickly • Maintain investigative control of evidence
S21 AutomateX helps teams automate repetitive digital forensic processing tasks, reduce manual workload, and support more consistent investigative processing workflows.
Specialist investigative tools for targeted workflows
Focused utilities for the investigative moments where a single visual clue, authenticity question, or repeated exposure burden can change the direction of review.
S21 School Badge Lookup
S21 School Badge Lookup helps investigators identify schools from badges, crests, and partial imagery that appear within digital evidence.
• Identify schools from partial imagery • Search badge and crest references • Support victim identification workflows
S21 AI Describe (for CSAM) generates structured image and frame descriptions designed to reduce repetitive exposure and support investigative review workflows.
• Structured image and frame descriptions • Reduce repetitive manual review • Support exposure reduction workflows
Trusted by investigators working complex digital investigations.
Operational feedback from investigators and forensic specialists using S21 tools in active investigative environments.
"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
"VisionX 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 categorisation process."
Cst. Fasullo, Chatham-Kent Police, Canada
Operational impact across real investigations
Operational results depend on the investigation, the dataset, and the investigator - but the right tools can materially change what teams are able to review, prioritise, and understand.
When digital evidence volumes keep growing, investigators need tools built for operational reality.
Support investigative teams with tools designed to review high volumes of digital evidence, prioritise what matters, and reduce unnecessary manual review burden.
