Frequently asked questions

Not all of them. Some brands (Ring, Arlo) store recordings in the cloud and require a paid plan to save clips. Others (Wyze, eufy, Reolink, TP-Link Tapo) record locally to a microSD card or a base station with no monthly fee. If avoiding a subscription is your goal, buy a local-storage camera and check that free recording covers the features you need.

Local storage keeps footage on a microSD card or a base station in your home — no monthly fee, and the video never leaves your network, which is better for privacy. Cloud storage keeps footage on the manufacturer's servers, which is convenient and offsite-safe but usually needs an ongoing subscription. Many people prefer local storage precisely because it avoids a recurring bill.

Yes. DIY systems like SimpliSafe, Ring Alarm, eufy and Abode all let you self-monitor for free: you install the sensors, and your phone gets an instant alert when one trips, with full app control to arm, disarm and sound the siren. A subscription adds professional dispatch — a staffed center that answers the alarm for you — but the alarm itself works with no fee.

You lose the 24/7 staffed monitoring center that answers the alarm and can call police or fire on your behalf when you're asleep or away. With self-monitoring, you're the one who reacts to the phone alert. For many households that's enough; if you travel often or want around-the-clock coverage, keep optional professional monitoring within reach — several systems let you switch it on month-to-month.

Start with the phones in your household. Apple Home is the natural fit if everyone's on iPhone and you value privacy; Alexa has the widest device support and the cheapest hardware; Google Home sits in between and is strong if you use Android and Google services. Pick the ecosystem first, then buy devices that work with it — that one decision prevents most compatibility headaches.

Matter is a common language for smart-home devices, backed by Amazon, Apple, Google and Samsung, that lets a device work across different ecosystems instead of being locked to one app. You don't strictly need it, but it's worth preferring: when two similar products are close in price and one supports Matter, choose that one, because it protects your flexibility later at no real cost.

They're layers, not rivals. Thread, Zigbee and Z-Wave are low-power wireless networks that carry the signal; Matter is the application language devices speak on top. Many Matter devices run over Thread or Wi-Fi. Zigbee and Z-Wave are older but still widely used and need a hub that speaks them. A modern hub that bridges several of these lets you mix devices freely.

Not always. Many Wi-Fi devices — plugs, some cameras, some bulbs — connect directly to your router and your phone with no hub. You need a hub when you use lower-power devices (Zigbee or Z-Wave sensors and bulbs) or want local, offline automation. A smart speaker like an Echo, HomePod mini or a SmartThings hub can double as a basic hub for many households.

For most beginners, a smart speaker (an Echo Dot or HomePod mini) plus one smart plug is the ideal starter kit. The speaker sets your ecosystem and can act as a basic hub; the plug makes any lamp or appliance controllable. It's cheap, it's useful on day one, and nothing about it strands you when you add more devices later.

Good smart locks are as secure as a quality traditional deadbolt, and most keep a physical key or a keypad as backup. If the batteries run low, the lock warns you well in advance; if Wi-Fi drops, local methods (key, code, or Bluetooth) still work — you just lose remote control until it reconnects. Choose a lock that fails gracefully, and keep a backup entry method.

They can, mainly by not heating or cooling an empty house. The U.S. Department of Energy and ENERGY STAR both note that programmable and smart thermostats save energy when used with sensible setback schedules. Actual savings depend on your climate, home and habits, but for many households a smart thermostat pays for itself within a couple of heating and cooling seasons.

A C-wire (common wire) provides continuous power to a thermostat. Many smart thermostats need one, and a missing C-wire is the most common installation snag. Some models include an adapter (like ecobee's PEK) that solves this for homes without one. Before buying, check your existing thermostat's wiring — it's the first thing to confirm.

They're as safe as you make them. Use a strong, unique password and turn on two-factor authentication, and keep the firmware updated. Local-storage cameras have a privacy edge because footage never leaves your home network. The FTC and CISA both publish short, practical guides on securing home cameras — it's worth two minutes.

It depends on the brand, exactly like cameras. Ring doorbells store recordings in the cloud and need a Ring Protect plan to save clips. eufy's doorbells record to built-in local storage with no fee. If you want a no-subscription doorbell, look for one with local storage rather than cloud-only recording.

Often, but not always — which is why we publish a compatibility matrix. Two devices work together when they share an ecosystem (both support Alexa, say) or both support Matter. Before buying a device from a different brand than the rest of your setup, check that it supports your ecosystem. That single check avoids most returns.

It can be almost nothing, or a few hundred dollars a year, depending on how many subscriptions you sign up for. The electricity a handful of smart devices draws is negligible; the real recurring cost is cloud storage and monitoring plans. Buy local-storage cameras and self-monitored alarms and you can run a capable smart home for close to zero per month.

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No — and we don't claim to. We don't run a hands-on test lab, so our picks are built on published specifications, manufacturer documentation, retailer listings and cited independent authorities, plus running-cost math we show in full. Every price is pulled live and dated. Our full method, and what we refuse to claim, is on the 'how we test' page.