Home Security Systems

A home security system is really two purchases wearing one name: the hardware you buy once, and the monitoringyou may pay for every month afterward. The sticker price on a starter kit tells you about the first and almost nothing about the second — and it’s the second that decides what the system actually costs you over five years. So this hub compares systems the way you’ll live with them: what you pay on day one, what (if anything) you pay every month, and whether you’re locked into a contract to get it.

The single biggest fork is who watches the system. With a self-monitoredsetup, your phone is the alarm: a sensor trips, you get a push notification, and it’s on you to call for help. With professional monitoring, a staffed monitoring center sees the alert and can dispatch police or fire on your behalf, around the clock. Neither is automatically right — they’re different trade-offs between money and peace of mind — but knowing which one you want tells you almost everything about which system to buy.

DIY or professionally monitored?

DIY systems — SimpliSafe, Ring Alarm, eufy, Abode — ship as a box of peel-and-stick sensors you install yourself in an afternoon, with no technician visit and no drilling. They’re the systems you can buy today and set up tonight, and they’re the ones we can price and link directly, because they sell as products. Professionally-installed systems are a different animal: a company sends a crew, wires the home, and signs you up for service. They can be excellent, but they’re sold as a contract, not a product on a shelf. Our best home security systems roundup covers the DIY field in full, ranked by what it really costs to own.

Self-monitoring is free; dispatch is the paid part

Here’s the detail the marketing tends to blur: with most modern DIY systems, self-monitoring is free. Arm and disarm from the app, get an instant alert when a door opens, control the siren — all of that works with no monthly bill. What the monthly fee buys is the dispatch service: a professional center that answers the alarm 24/7 and calls the authorities so you don’t have to. Some systems make that optional and month-to-month (SimpliSafe, Ring, Abode); one here has no professional option at all and is self-monitored by design (eufy). If you never want a recurring bill, start with our no-subscription systems — the ones you can run entirely for free.

No contracts — mostly

The old alarm industry ran on multi-year contracts with early-termination fees, and that reputation still scares people off. The DIY brands broke that model: their monitoring, where you want it, is month-to-month — turn it on for a vacation, turn it off when you’re home for a stretch, cancel any time. That flexibility is a real part of the value, and it’s why we lead every system’s write-up with whether a plan is required, optional, or absent. A no-contract system you self-monitor for free is genuinely a buy-once purchase.

The monitored giants: ADT, Vivint and Brinks

You’ll also see the big professionally-installed names — ADT, Vivint, Brinks. These are quote-based, contract-based services rather than boxed products, and they are not sold on Amazon, so you’ll find no buy button for them here — we cover them editorially, to help you decide whether the installed-and-monitored route is worth it for you. They tend to suit larger homes, people who want a hands-off install, and buyers who value a single company owning the whole system. If that’s the route you’re weighing, our Vivint review walks through what the monthly commitment really looks like and who it actually fits.

What it actually costs to own

Add it up over five years and the picture changes. A DIY kit you self-monitor for free can cost almost nothing after the hardware; the same kit with professional monitoring adds a monthly fee that, over five years, can exceed the price of the hardware itself; and a professionally-installed, contracted system sits higher again. None of that makes any option “wrong” — it makes them answers to different questions about how much you want to do yourself. We lay the numbers out in the home security system cost guide, so you can see the five-year total before you commit. Below, every system leads with its hardware, its monitoring options, and a live price, so the running cost is on the table from the start.