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.
Kings Award for Enterprise: Innovation and 2019 Queen’s Award for Enterprise: Innovation in 2019
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.
Get The Latest DFIR News
Join the Forensic Focus newsletter for the best DFIR articles in your inbox every month.
Unsubscribe any time. We respect your privacy – read our privacy policy.
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.
evidence, main image and video categorisation interfaces
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.
is the world’s biggest CSAM intelligence database with over 3 billion law enforcement contributed records, and growing rapidly
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.
all persons detected in evidence, filtering by colour of clothing
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.
