Fleet trackers with a kill switch, compared honestly.
Updated July 2026 - every vendor claim below is cited to that vendor's own public documentation.
If you run trucks and want the power to shut one down - after a theft, or when a terminated contractor will not bring it back - you have five real options. They are not the same. The biggest difference is one most sales pages never mention: what happens when the truck is already running.
The short version
- Pick Samsara, Motive, or Verizon Connect if you want an all-in-one platform - ELD, cameras, maintenance, dispatch - and engine shut-off is a nice-to-have on top. They are strong platforms with starter-interrupt add-ons.
- Pick a consumer tracker (Spy Spot, Trackhawk class) for a personal car or a single low-value asset on a tight budget.
- Pick Horus GPS if the job is truck theft and unauthorized-use control: it is the only option here whose kill switch shuts down a running engine (once the vehicle is stationary - parked or idling), with no extra gateway hardware and no long-term contract. It also runs alongside any of the platforms above without touching them.
| Samsara | Motive | Verizon Connect | Consumer trackers | Horus 3800 | |
|---|---|---|---|---|---|
| Engine shut-off type | Starter interrupt - blocks the next start | Starter interrupt - blocks starts and restarts | Starter relay - immobilizes only after ignition is off | Starter disable relay | Active kill switch - shuts down the running engine once stationary (parked or idling) |
| Works on an idling or running truck | No | No | No | No | Yes - once the vehicle is stationary |
| Extra hardware required | Vehicle Gateway (~$420, public reseller pricing) | Motive platform hardware | CalAmp tracker + immobilisation kit | None beyond the tracker | None - one device |
| Upfront, per vehicle | $79-$180 immobilizer + gateway | Not published - quote | Not published - quote | Roughly $50-$150 retail | $100 activation - includes 24-month hardware rental, SIM, setup |
| Monthly, per vehicle | $27-$60+ license | Platform subscription - quote | Reveal subscription - quote | Roughly $20-$35 | $30 ($24.90 billed annually); as low as $14.99 for large fleets |
| Contract | 3-year minimum; no month-to-month (per Samsara's FAQ) | Quote-based - confirm the term | Quote-based - confirm the term | Often month-to-month | Month-to-month, 30-day notice |
| Built for | Full fleet-management platform | Full fleet-management platform | Full fleet-management platform | Cars and small assets | Truck theft and unauthorized-use control for fleets |
Prices are public vendor and reseller listings accessed July 2026; quote-based items are not published by the vendor. Confirm current pricing and terms with each vendor.
Samsara
A leading all-in-one platform - cameras, ELD, maintenance, dispatch. Its Engine Immobilizer is a starter-wire interrupt: per Samsara's own documentation, disable a moving vehicle and it takes effect only after the vehicle stops and turns off. Requires a Vehicle Gateway and a software license on a 3-year minimum term; fleets of 10 or fewer pay all three years upfront.
Motive
Samsara's biggest rival, with a similar platform breadth. Its Engine Immobilizer is relay-based on the starter line - it prevents starts and restarts, and per Motive's docs is not intended to stop a vehicle in motion. Solid choice if you're buying the whole platform; the shut-off has the same next-start limitation.
Verizon Connect
Enterprise fleet tracking under the Reveal platform. Immobilisation uses a relay attached to the starter: you can send the command while the vehicle moves, but per Verizon Connect's documentation the vehicle is not immobilised until the ignition is off. Requires a CalAmp tracker plus an immobilisation kit.
Consumer trackers (Spy Spot, Trackhawk class)
Inexpensive hardwired trackers with a starter-disable relay, sold mostly for cars, BHPH lending, and single assets. Fine for that job. They block the next start only, and are not built around fleet workflows, trailer tracking, or commercial-truck power systems.
Horus GPS
Built for one job: keeping fleet trucks under their owner's control. The hidden, hardwired 3800 pairs live tracking with an active kill switch that shuts down the running engine once the vehicle is stationary - parked or idling - then keeps it from restarting. One device, no gateway, $100 activation with hardware rental included, month-to-month. Ownership is verified before any activation, and it installs alongside any platform above - including your ELD - without touching them.
Why the idling point decides it for trucking: long-haul trucks idle roughly 1,800 hours a year (U.S. Department of Energy) - overnight for heat and AC - and some rarely shut off at all. A shut-off that waits for the next start protects the trucks that need protection least.
Common questions
Yes. Horus installs separately, on its own power path, and doesn't touch your existing telematics, cameras, or ELD. Many fleets keep their platform for compliance and dispatch, and add Horus for theft and unauthorized-use control — no rip-out, no migration.
No — by design. It engages only when the vehicle is stationary — parked or idling, engine on or off. Unlike starter-interrupt immobilizers that only block the next restart, it can shut down a running engine once the vehicle stops moving. It's there to keep a vehicle from being driven away, not to stop one on the road.
GPS alone shows you where your truck is — it doesn't get it back, and police often call it a civil matter when there was a contract. With Horus, it's your truck and your title: once it stops — parked or idling — you shut the engine down from your phone, and it stays down until you say so. The conversation changes once the truck can't move.
No. Horus installs alongside your ELD with no interference, and we never touch your ELD or HOS data.
No. Month-to-month with 30-day notice. Annual billing saves 17% if you want it.
Sources
- Samsara Help Center - Engine Immobilizer. Accessed July 2026.
- Samsara Help Center - Small Business FAQ (3-year minimum term). Accessed July 2026.
- Motive Help Center - Engine Immobilizer Overview (starter-line relay; not intended to stop a vehicle in motion). Accessed July 2026.
- Motive Help Center - Will the Engine Immobilizer stop the vehicle in motion? Accessed July 2026.
- Verizon Connect - Immobilisation (starter relay; vehicle not immobilised until ignition is off). Accessed July 2026.
- Public reseller pricing for Samsara hardware (LTT Partners, CDW, Sourcewell). Accessed July 2026.
- Trackhawk GPS - kill switch disrupts the starter. Accessed July 2026.
- U.S. DOE / Argonne - long-haul trucks idle ~1,800 hours per year. Accessed July 2026.