How much do security robots cost?

The short answer

In 2026, commercial security robots are mostly sold as a service. Ground patrol robots typically cost between roughly $6 and $12 per robot-hour on subscription. Aerial systems such as drone-in-a-box and redeployable sentries are generally priced between $8 and $20 per hour depending on payload and service level. Tencer's Site Watch subscription starts at $9.80 per sentry-hour, including hardware, software and maintenance.

Outright purchase is less common outside government. When it is offered, expect a five-to-six-figure hardware price per unit plus an annual software and support fee of 15–25% of hardware cost.

Those numbers only mean something next to the alternative, which for most sites is people. So this guide walks through how to compare the two honestly.

Pricing models you will encounter

Robotics-as-a-service (RaaS)

You pay a recurring fee — hourly, monthly or annually — and the vendor owns the hardware, maintains it and replaces it when it wears out. RaaS turns a capital purchase into an operating expense and shifts hardware risk to the vendor. Watch for minimum terms (12–36 months is typical), minimum fleet sizes, and what counts as an "hour": hours on watch, hours deployed, or calendar hours.

Purchase plus support

Governments and some large enterprises buy systems as equipment and pay separately for software licenses, sustainment and training. This makes sense when you have in-house maintenance capacity, need to own the asset for accounting or sovereignty reasons, or expect to run systems for more than five years.

Managed service

The vendor or a partner also provides the people who monitor the system. This is the closest like-for-like replacement for a guarding contract and is priced accordingly — often 30–60% above the hardware-only subscription.

What drives the price

Two robots with similar specifications can differ in price by a factor of two. The main drivers are:

• Sensors. Cooled thermal imagers and radar cost far more than visible cameras, and they are the difference between seeing at night across a field and seeing a few metres down a corridor.
• Environment. Outdoor, all-weather, wide-temperature systems are engineered and tested very differently from indoor robots.
• Autonomy and software. The value of a security robot is mostly in how few decisions it hands to people. Mature autonomy and fusion software costs more to build and is worth more to run.
• Service level. Availability guarantees, spares on site and response times for repairs all carry a cost. A 99.5% on-watch SLA is a different product from best-effort support.

What a guard post really costs

A single post covered 24 hours a day, 365 days a year is 8,760 hours. Because people need time off, training, sick leave and holidays, staffing it takes roughly 4.2 full-time equivalents. Loaded costs for contract security in the United States and Western Europe commonly run from $25 to $45 per hour once wages, overtime, insurance, supervision, uniforms and the contractor's margin are included.

Guards bring judgment, presence and the ability to physically intervene, and no responsible vendor will tell you to remove all of them. But a large share of guarding hours is spent watching for something that almost never happens, at locations chosen for convenience rather than coverage. That is the work autonomous systems do better.

A worked example

Consider a 40-hectare utility site with six 24/7 posts at $34 per loaded hour. Annual guarding cost is roughly $1.79 million.

A typical Tencer design for that site would use four Kestrel sentries and one Roost hive, supervised from the utility's existing operations center:

• Four Kestrels × 8,760 hours × $9.80 = about $343,000
• One Roost × 8,760 hours × $2.40 = about $21,000
• Total: about $364,000 per year, a reduction of around 80%

Most customers do not take the whole saving. They keep one or two mobile response officers — now dispatched to verified events rather than standing at gates — and still reduce costs by more than half while improving detection. You can run your own numbers in the pricing calculator.

Hidden costs to ask about

• Installation and site works. Towers and docks may need foundations, trenching, power and network. Ask for a fixed price.
• Connectivity. Cellular data, satellite links or private networks can add meaningfully to monthly cost for remote sites.
• Monitoring. Someone must respond to escalations. If that is not your existing operations center, budget for a monitoring service.
• Integration. Connecting robots to your VMS, access control or dispatch system can be a separate professional-services line.
• Batteries and wear parts. Under RaaS these should be included. Under purchase they are often not.
• Regulatory work. Aerial systems may need airspace authorizations, which take time and sometimes consultants.
• Exit costs. What happens to your data, your integrations and any site works if you end the contract?

Running a pilot and measuring payback

Few organizations replace a guarding contract in one step. The usual path is a pilot at one or two representative sites, run for 60 to 120 days alongside existing security, followed by a phased rollout.

A useful pilot measures the same things before and after:

• Detections per week, and how many of them were real incidents.
• Time to identify: from first detection to an operator knowing what it is.
• Time to respond: from identification to deterrence or dispatch.
• Coverage: the share of the site that is visible at any given moment, day and night.
• Staff hours spent on static watch versus active response.

Payback under a subscription model is usually immediate, because there is no capital outlay — savings start in the first month in which posts are reduced. Under a purchase model, payback periods of 12 to 24 months are typical for sites with three or more 24/7 posts. The most common reason pilots fail to show savings is that no guarding hours are actually removed; the robots are layered on top of an unchanged contract. Decide in advance which posts the pilot is meant to replace.

How to compare vendors fairly

Ask every vendor for three numbers on the same site: time on watch (the fraction of the day the system can actually see), operator ratio (how many units one person can supervise), and all-in annual cost including installation, connectivity and monitoring. Then divide cost by hours of effective coverage.

A cheap drone that is airborne 25% of the time is not cheap. A system that floods operators with motion alerts is not autonomous. The architecture you choose — fixed, drone-in-a-box or redeployable — will move these numbers more than any discount. Our architecture comparison explains why.

Residential security robots

Home and estate robots are priced differently. Consumer-grade indoor robots and camera drones start in the hundreds of dollars but are largely novelty devices. Serious residential patrol robots such as Tencer Warden start around $3,900 with a monthly service plan, and estate deployments that add aerial sentries are quoted after a site survey. Our home security robot buyer's guide covers this segment in detail.

Frequently asked questions