In the world of digital forensics, time is critical, accuracy is everything, and the toll on investigators is all too real. At Semantics 21 (S21), we understand that, because we’ve been working alongside digital forensics professionals for over a decade. Our mission is simple: rescue more victims, accelerate investigations, and protect the mental wellbeing of those who carry out this vital work.
We’re not a faceless software vendor. We’re a specialist team of engineers, former investigators, and AI experts based in the UK with a growing international presence across the USA, Canada, Europe and further afield. Since our founding in 2015, our goal has been to bridge the ‘semantic gap’ – helping AI to think and operate more like investigators do. We’ve quietly developed the most advanced tools in the market, and now, as we expand rapidly, it’s time you discovered why so many professionals call us digital forensics’ best kept secret.
We’re also a multi-award-winning company, proudly recognised with the King’s Award for Enterprise in 2024, the Queen’s Award in 2019, and many others. We’ve built a proven track record of helping law enforcement around the world rescue thousands of children every year through innovative technology and investigator-first design.
To date, our growth has been entirely fuelled by word of mouth – a reflection of the trust and results we deliver. But as we continue to expand globally, we want to get our tools into your hands too – to help you protect the public and save more lives, faster.
Engineered for Real-World Investigations
Our flagship product, S21 LASERi-X, has redefined how investigators approach CSAM categorisation and victim identification. For those familiar with Magnet GriffEye, we’re the alternative. Used by law enforcement agencies worldwide, S21 LASERi-X is a powerful AI-driven platform built specifically to meet the demands of CSAM cases. Unlike traditional tools, it doesn’t just process data – it thinks like you do.
Through intelligent automation, intuitive workflows, and precision filtering, S21 LASERi-X reduces media review time significantly, enabling teams to focus on finding victims, not wrestling with software.
Its integration with the S21 Global Alliance Database (GAD) – the largest CSAM intelligence database in the world, with over 3 billion law enforcement records – means S21 LASERi-X can pre-categorise over 80% of media automatically, accelerating your triage and making an immediate impact on case progression.
And yet, despite its power, S21 LASERi-X remains cost-effective, deployable without servers, and is remarkably easy to learn. Whether you’re a seasoned investigator or new to the field, you’ll be up and running quickly – empowered to save children that other tools might miss.
Watch our short video about the S21 Global Alliance Database (GAD):
Pricing starts from just $999 per licence for site deployments, or $1,999 standalone, with no servers or special hardware required.
Check out our website, watch our latest webinar, or request your complimentary license at www.semantics21.com to experience the power of S21 LASERi-X first-hand.
Revolutionising CCTV Review
Our second standout tool is S21 CCTV – a forensic game-changer that’s transforming how agencies handle video evidence. For those familiar with AmpedFive and BriefCam, we’re the alternative. Originally deployed for free during the UK riots, S21 CCTV enabled forces to review thousands of hours of CCTV footage in just weeks – a task originally estimated to take over two years.
Powered by custom-built AI models, S21 CCTV identifies vehicles, number plates, faces, clothing and on-screen text (OCR) in seconds. It includes powerful video enhancement tools like deblur, recolour, super-resolution, shadow removal, and our exclusive anti-shake stabilisation – ideal for fast-moving bodycam footage. Built-in automatic redaction protects identities, allowing GDPR-ready exports.
Designed to run on standard police hardware, S21 CCTV offers both Frontline Mode (for rapid access on operational terminals) and Pro Mode (unlocking deep forensic analysis). There’s no need for servers, special hardware or a steep learning curve – it’s intuitive, fast, and completely offline.
This isn’t theory – it’s working in the field every day:
Police Service of Northern Ireland (PSNI) originally estimated a two-year CCTV review following the UK riots. With S21 CCTV, they completed the investigation in a matter of weeks.
In a major international murder case, officers missed a crucial suspect vehicle during weeks of manual review. S21 CCTV found the van in seconds – visible for just three seconds, rounding a corner – playing a vital role in securing conviction.
It’s already being used in investigations into missing persons, gang violence, trafficking, homicide and more.
Pricing starts from just $149 per licence for site deployments, or $1,999 standalone, with no servers or special hardware required.
Watch our latest webinar, request your free trial, or learn more at www.semantics21.com.
Human-AI Transcription, Done Right
The latest addition to our suite is S21 Transcriber, developed in collaboration with the UK’s National Crime Agency (NCA). It allows you to transcribe audio from interviews, phone messages, bodycams and more – all completely offline.
Supporting UK, US and international languages, S21 Transcriber enables real-time playback, precise adjustments, easy search and report generation. On average, it’s up to 80x faster than manual transcription, while our human-AI hybrid approach ensures higher accuracy than automated-only solutions. It’s been a game-changer for forces under time pressure or operating in sensitive environments.
Pricing starts from just $99 per licence for site deployments, or $699 standalone, with no servers or special hardware required.
Explore the tool on our website, sign up for our upcoming webinar, or get started today with your complimentary licence.
Tools That Just Work – No Gimmicks, No Servers
All our tools are designed to run offline, with no hidden server costs or over-engineered systems. No bolt-ons. No app stores. No endless add-ons to make it work. Everything you need is included in the product – out of the box. We’ve built our solutions to do one thing exceptionally well: help you work smarter, faster, and more effectively in the face of rising digital caseloads.
You shouldn’t have to compromise between speed, accuracy and wellbeing. At S21, we believe you deserve software that meets you where you are, supports your workflow, and helps you go home on time.
We are trusted daily by major agencies, including the UK’s NCA, MET Police, Merseyside Police, and Staffordshire Police, as well as the RCMP, OPP and almost all Canadian forces, not to mention significant and specialist units across the USA and beyond. These organisations not only use our tools – they recommend us every single day. If you’d like to speak directly with an existing user, just ask – they are incredibly supportive of our shared mission.
We’re proud to support and work alongside all of the tools in your digital forensics toolkit, because history has shown us that one-tool solutions don’t work and cost lives. Only by creating an open community and through collaboration can we together offer experts like yourselves the best support possible.
Your Next Step: Let’s Talk
We’re proud to support digital forensics professionals around the world – but we want to do more. If you’re involved in CSAM investigations, CCTV review, or transcription, we invite you to get in touch for a complimentary licence to try any of our tools. Training is included, and our dedicated support team will make sure you get the most out of the experience.
We’ll smash any like-for-like quote and never hit you with expensive annual price rises. What you see is what you get – powerful, reliable, investigator-driven software that just works.
We’ve spent years developing software to meet your needs. Now it’s your turn to see the difference for yourself.
Visit www.semantics21.com, watch our webinars, or email info@semantics21.com to request your complimentary licence today.
Let’s rescue more victims. Let’s close more cases. Let’s protect those who protect us.
