Guide · 3 min read · Oct 25, 2026
Security robots vs. security guards: an honest comparison
What patrol robots really cost per hour, what they can and can't do, and how to decide between a robot, a guard, cameras, or a mix.
Short answer: outdoor patrol robots are typically rented on annual subscriptions at an effective $9–$11 per hour for a 24/7 unit (the published numbers we found are from one vendor, Knightscope). Human overnight guards cost several times that per hour. But they're not doing the same job. A robot can see, record, light up and talk. It can't help someone who's hurt, calm down an argument, or chase anyone. (Please don't ask it to.)
The numbers
| What | Price | Source |
|---|---|---|
| Knightscope K5, marketed rate | "around $11/hour" (vs. "$30–$50/hour" for an overnight guard, by Knightscope's own comparison) | Knightscope, Aug 2025 |
| Knightscope line-up, older published range | effective $6–$12/hour on annual 24/7 contracts | Knightscope blog |
| K5 brochure | "as low as $545/month" (not a 24/7 rate) | Knightscope brochure |
| Independent tracker | NYC's 2023 subway pilot at ~$9/hour; annual rentals ~$70k–$80k reported | The Bot Scout |
Accessed October 2026. Note the guard comparison comes from a company that sells robots. Get a local guard quote before you trust anyone's comparison, including ours.
Read the per-hour number carefully
That "$11/hour" is an annual 24/7 subscription divided by 8,760 hours. If you only need night coverage, divide the annual price by your hours instead, and the robot gets a lot less cheap. (We wrote a whole section on this in RaaS explained.)
Also: the K5 brochure lists patrol time of about 2.5–3 hours between charges, with 20–30 minute autonomous charging. So "24/7" means a patrol loop with charging breaks built in.
What robots are genuinely good at
- Being seen. A five-foot glowing robot in a car park is a deterrent. That's most of the value.
- Never getting bored. Same route, every night, with full video, plate reading and thermal imaging, depending on model.
- Data. Timestamped records of what was where. Very useful for insurers and incident reviews.
- Boring, large, open spaces: car parks, logistics yards, campuses, data-centre perimeters.
What they're bad at
- Anything requiring hands or judgement: first aid, de-escalation, detaining, opening a door for a locked-out employee.
- Stairs, rough terrain, crowded indoor spaces (model-dependent; legged robots do better on terrain, at a higher price).
- Responding. A robot raises an alert. Someone still has to answer it. Ask who that is, at 3am.
Bot or not?
| Situation | Our honest suggestion |
|---|---|
| Small shop, one entrance | Good cameras + monitored alarm. No robot. |
| Large car park or yard with repeat theft | Robot or mobile camera tower, plus a remote monitoring centre |
| Site that needs a human to check IDs or help visitors | Guard, possibly supported by a robot for the boring rounds |
| Construction site overnight | Compare camera trailers, a robot, and a guard. Trailers often win on price |
What to ask in your RFQ
- All-in annual price for my coverage hours, not 24/7 unless I need it
- Who watches the alerts, and what's the response SLA?
- Terrain, weather and slope limits. Show me a site walk-through plan.
- Privacy: where is video stored, for how long, who can access it? Is facial recognition on or off, and is it legal here?
- Minimum contract term and exit clauses
- References from a site like mine
A note on rules: recording audio and video, and especially facial recognition, is regulated differently by country and state (GDPR in Europe, state biometric laws in parts of the US). Make the supplier explain how their setup complies where you are.
Request security patrol quotes. It's free.