Best Gun Detection Systems for Schools - What to Consider?

If you are reading this, the question of whether to add weapons detection has probably been settled for you. A board meeting, a parent group or an incident at a neighboring district put it on your desk. The job now is deciding what to buy.

That decision stalls for a predictable reason. The products sold as weapons detection belong to three different technologies, and they solve different problems. Vendors still compare themselves across those lines as if they were interchangeable. A camera-based detection subscription and a walk-through screening lane do not do the same job, so a feature checklist that puts them side by side tells you very little.

The short answer: for a district with several buildings, open grounds and IP cameras already on the wall, camera-based gun detection is the practical baseline, because it covers ground you cannot put a screening lane in front of. For a single building with one controlled entrance and staff to run it, entry screening does something cameras cannot. It finds a concealed weapon before it comes through the door.

This guide starts with the three technologies and what each cannot do, then the criteria that decide it for a district, a comparison table, the vendors, and a decision section by district profile.

How to evaluate weapons detection for a K-12 campus

The three technologies, and what each one cannot do

Camera-based gun detection. Software watches video from your existing security cameras and alerts when a visible, drawn firearm appears. Because it runs on cameras, it covers everywhere they do: hallways, cafeterias, parking lots, athletic fields and the bus loop. Its hard limit is that it cannot see a concealed weapon. A handgun in a backpack is invisible to it, and by the time it alerts, the gun is out. For more on the mechanics, see how camera-based gun detection works.

Entry screening. Walk-through metal detectors and AI-assisted screening portals check people as they come through a door. This is the only branch that can catch a concealed weapon before it enters the building. It needs a chokepoint, staff at every lane during arrival, and a plan for every door you are not screening. Walk-through metal detectors are also the one branch with a published federal performance standard, NIJ Standard 0601.02. We compare the two approaches in depth in AI gun detection versus metal detectors.

Acoustic gunshot detection. Sensors recognize the sound of gunfire and report where it happened. That location speeds up response and helps reconstruct an incident afterward, but the system only triggers once a shot has been fired. It is a response tool, not an early warning.

A simple way to hold the three together: screening asks whether someone is carrying a weapon in, camera detection asks whether a weapon has appeared anywhere you can see, and acoustic detection asks whether one has been fired and where. Because each answers a different question, districts that use more than one are layering them, not duplicating them.

Six criteria that decide it for a district

1. Campus geometry. Count buildings, entrances, portables, athletic fields, the bus loop and after-hours use of the gym. A district with twelve buildings and an open campus cannot screen its way to coverage. This criterion settles the technology choice more often than any other.
2. Who receives the alert, and when. At 7:45 a.m. your SRO is on site and the front office is staffed. At 9 p.m. during a football game, neither may be true. Ask every vendor where an alert goes first: the vendor's own monitoring center, a third-party monitoring service, or straight to district staff and dispatch. This is where vendors genuinely differ, and where most comparisons go vague.
3. The cost of a false alarm. In a district, a false lockdown is a board-level event: parents at the doors, local press and a week of follow-up. Umbrellas, phones, power tools, theater props and crowded passing periods are the everyday triggers. Ask how a detection is confirmed before it escalates and what you can configure, and ask how any accuracy figure was measured before you weigh it.
4. What is already on the wall. Most districts run a mixed camera fleet, often with older, lower-resolution cameras in the corridors that matter most. Placement and resolution limit what any detection model can see, whoever the vendor is. List what you already run for emergency notification, visitor check-in and door control too, because every extra console is a real cost for a two-person IT team.
5. Funding and procurement timing. Districts rarely buy when they decide. They buy when grant money lands, a bond passes or the board calendar allows. Ask which grant cost categories a vendor's offering fits and how long deployment takes against your spend deadline.
6. Mandates and deadlines. State requirements increasingly shape what districts buy. Alyssa's Law states require panic alarm capability that reaches law enforcement. Georgia's HB 268, for example, required every public school to have a mobile panic alert system connected to 911 and to procure digital campus mapping data by July 1, 2026, and requires behavioral threat assessment in school safety plans by January 1, 2027.

Weapons detection systems for schools compared

The first four run on cameras and answer whether a weapon has appeared. The last three are entry screening and answer whether one is being carried in, so compare them with each other rather than with the camera-based tools.

The vendors

These are the camera-based and entry-screening options districts shortlist most often. If you're also weighing panic button and alerting vendors, see our roundup of CENTEGIX alternatives for districts.

Coram

Coram Firearm Detection watches video from a district's existing IP cameras and alerts when a brandished handgun or long rifle appears. It runs on a compatible Coram Point appliance connected to those cameras, with no camera replacement. First-stage detection runs on the appliance and footage stays on site, while cloud verification and alert delivery need an internet connection. Local recording continues if the connection drops. Multi-layer AI processing separates a drawn firearm from holstered weapons and lookalike objects, and recipients confirm or dismiss each alert in the Coram mobile app.

What matters for a district is what happens after the alert. Each alert has its own recipient list and schedule, so a 9 p.m. football game can route to different people than a school day. From the alert, a staff member with Emergency Management access can trigger a preconfigured emergency such as a lockdown. That emergency then locks linked doors through Coram Access Control, shares the alert's video clips into the emergency's response chat, and, where the emergency type uses automatic dispatch, notifies 911 immediately. Emergency Management also covers email, SMS and critical push alerts to staff, hardware panic buttons and student reunification, and front-office check-in runs on Guest Management in the same system. For a small IT team that otherwise runs separate logins for cameras, doors, visitors and emergencies, that is one place to manage all four. Journey path lets staff follow a person across cameras after an alert.

Salem City Schools in Virginia contracted with Coram for weapons detection at Salem High School after considering metal detectors. A district official told GovTech that metal detectors were "ill-equipped to handle that level of volume."

Best for: districts with cameras across several buildings that want detection connected to video, doors and emergency response in one platform.

Limits: like every camera-based system, Coram needs a visible weapon and a camera that can see it clearly. It will not find a concealed weapon, and coverage is bounded by where your cameras are and how well they resolve. Coram does not hold a DHS SAFETY Act designation, so weigh that if your board or your state's funding rules require one. Firearm Detection alerts go to district staff rather than a staffed vendor monitoring center. Emergency Management can send alerts directly to 911, but it does not yet show on a campus map where a panic button was pressed, which some state versions of Alyssa's Law effectively require. Coram is licensed per camera.

ZeroEyes

ZeroEyes is dedicated camera-based gun detection with human verification. When its AI flags a possible firearm on an existing camera, the image goes to the ZeroEyes Operations Center, where trained staff confirm it before an alert is sent. ZeroEyes holds a DHS SAFETY Act Designation, and schools are a core market.

Best for: districts whose board wants every alert confirmed by a person before a lockdown is called, and that value SAFETY Act coverage.

Limits for a district: it is a detection and verification service that overlays your existing cameras and dispatches alerts to first responders, rather than replacing your video management system. Ask how long human review adds between detection and alert.

Omnilert

Omnilert Gun Detect runs on existing security cameras, routes potential threats for human verification, and can start response workflows based on district policy, pairing detection with emergency communications. Omnilert received full DHS SAFETY Act Designation in March 2025. Sarasota County Schools chose it partly for flexibility in how detections are verified and escalated.

Best for: districts that want detection and notification from one vendor and control over who verifies an alert.

Limits for a district: it integrates with VMS platforms such as Milestone, Genetec and Hanwha rather than replacing them, so video management stays in a separate system. For a direct head-to-head, see Omnilert and ZeroEyes compared side by side.

Scylla

Scylla adds visible weapon detection to existing cameras and video management systems, and can trigger text alerts, alarms or door lockdowns through integrations. It supports on-premise and air-gapped deployment. Artesia Public Schools layers Scylla's on-camera detection with a separate gunshot detection system and a monitoring service.

Best for: districts with network constraints or a policy against cloud video, and those building a layered setup around an existing VMS.

Limits for a district: as a detection layer, it depends on other systems for monitoring and response, as the Artesia setup shows.

Evolv

Evolv Express is entry screening: walk-through portals that check people for weapons at the door. In November 2024, Evolv reached a proposed settlement with the FTC over claims about its detection capabilities. Evolv admitted no wrongdoing. The settlement requires it to notify certain K-12 customers that they may cancel contracts signed between April 2022 and June 2023. Evolv also sells Evolv eXtend, which integrates Omnilert's camera-based gun detection.

Best for: a single controlled entrance or high-volume entry at events, with staff to run the lanes.

Limits for a district: each screened entrance needs staffed lanes, and districts should ask for test results from school conditions, not marketing figures.

Xtract One

Xtract One builds purpose-designed weapons screening hardware in two product lines for different facility types, installed at each screened entry. We compare the two approaches in detail in Coram vs Xtract One.

Best for: districts that have decided entry screening is the right layer and want hardware built for it.

Athena Security

Athena focuses on point-of-entry screening, combining concealed weapons detection with AI-assisted X-ray screening of bags, and markets to K-12 schools among other facilities.

Best for: entrances where bags need screening as well as people.

Which system fits which district

• Several buildings, open grounds, IP cameras already installed. Start with camera-based detection. It is the only branch that covers ground you cannot put a lane in front of, including lots, fields and the bus loop.
• One building, one controlled entrance, staff to run a lane. Entry screening is the better first buy. It catches the weapon before it comes through the door, which no camera can do.
• Board wants a person to confirm every alert before a lockdown. Look first at the human-verified services, ZeroEyes and Omnilert, and at SAFETY Act coverage.
• Small IT team already juggling separate systems for cameras, doors, visitors and emergencies. Weigh a platform that connects them against adding another point solution. The console count matters as much as the detection.
• Aging or mixed camera fleet. Audit camera resolution and placement before buying any detection layer. A detection subscription on cameras that cannot clearly show a handgun across a hallway buys very little.
• Grant-funded with a spend deadline. Deployment time and what counts as an allowable cost will decide this more than features will.
• Operating under a state mandate. Buy to what the statute requires first, then extend.

If you want to see what camera-based detection would look like on your district's existing cameras, see how Coram Firearm Detection works.