Digital investigation software helps law enforcement collect, process, review and make sense of digital evidence, from CCTV and audio to images, video and seized device data. It automates repetitive processing, surfaces the material that matters and keeps investigators in control, so teams can work through growing evidence volumes without missing key leads.
Semantics 21 builds this software specifically for investigators, across both CSAM and ICAC investigations and general digital forensics.
When digital evidence volumes keep growing, investigators need tools built for operational reality. Unsupported formats, failed processing and evidence that never becomes searchable create critical blind spots within digital investigations, and investigators may make decisions without visibility of the full dataset.
Semantics 21 tools are designed to reduce those gaps, helping investigative teams review more evidence, surface relevant intelligence faster and work with greater confidence.
Review large volumes of image and video evidence, identify visual connections and prioritise the material that matters for CSAM investigations.
Rapid frontline triage that helps investigators explore, filter and prioritise complex CSAM evidence and surface leads faster.
Review, enhance and analyse CCTV and digital video evidence up to 400 times faster than manual review.
Secure offline transcription of audio and video evidence, so investigators can search and report spoken content without the cloud.
Automate repetitive forensic processing, from imaging to data carving, to move evidence from raw to review-ready faster.
Surface cross-case intelligence at scale, drawing on over 3.5 billion law-enforcement-contributed intelligence records.
For child protection and ICAC teams, Semantics 21 helps investigators review digital evidence faster, prioritise high-risk material, support victim identification workflows and reduce unnecessary investigator exposure.
For wider digital investigations, S21 tools are built for investigators reviewing CCTV, audio, video and digital evidence under operational time pressure, turning fragmented processing tasks into clearer, faster investigative workflows.
Sensitive evidence stays in your environment, with no reliance on cloud services.
Designed for the evidence volumes and time pressure investigators actually face.
Guided workflows work for frontline officers and forensic experts alike.
Automation handles the repetitive work while professional judgement stays in charge.
Semantics 21 tools are used by specialist investigative teams worldwide, including British Transport Police, the Metropolitan Police, HM Revenue & Customs, the Royal Canadian Mounted Police and the U.S. Department of Defense.
See more in our case studies.
Evidence stays in your environment, with nothing sent to the cloud.
Runs without additional hardware or third-party plugins.
Designed so any investigator can review video evidence, not just specialists.
AI surfaces the key moments so urgent investigations move faster.
Digital investigation software helps law enforcement process, review and understand digital evidence such as CCTV, audio, images, video and seized device data. Semantics 21 software automates repetitive processing, surfaces relevant material and keeps investigators in control.
Yes. Semantics 21 is built specifically for law enforcement, investigators and approved related organisations, not as a general-purpose tool. Access to intelligence such as the S21 Global Alliance Database is restricted accordingly.
Yes. S21 tools run fully offline, so sensitive evidence stays in your environment with no reliance on cloud services.
Yes. S21 Discovery supports rapid triage and victim identification workflows, while S21 VisionX supports large-scale visual review, prioritisation and investigator-led assessment.
