You can find smart home security solutions in the dedicated section of our catalog. Among other basic devices, we also highlight smart bulbs, sockets, and remote-controlled thermostats. We also recommend reading “10 sensors your smart home can’t be smart without” and “Saving electricity with a smart home: which devices help cut costs?”.

1. What is a smart home protocol and why do you need it?

A smart home is an automated system where many devices work in sync— various household and climate appliances, bulbs and light fixtures, security sensors, smartphones, etc. To operate as a single whole, these nodes must interact.

Let’s take a simple, familiar scenario for all of us—seamless pairing between a phone and same-brand smartwatches or TWS earbuds. But when manufacturers differ, nuances can arise. A smart home can use many devices from different brands. To work correctly across scenarios, they need common protocols that essentially solve two tasks—pairing and interaction. For example, a protocol links the entryway sensor with a bulb in another part of the room. Plus, it helps them interact, such as sending commands to turn on, change brightness, etc.

A protocol’s task is to transfer data between devices and ensure they interact.

What a properly chosen smart home protocol gives the user:

  • Broad compatibility. In other words, the ability to combine various devices from different manufacturers into one system.
  • Reliability. Data transmission between devices is fast, without delays or failures.
  • Energy efficiency. The less energy needed for data exchange, the longer sensors and other devices will run without replacing batteries.
  • Security. Protocols don’t just send signals—they encrypt them, which is crucial for security systems and privacy so your smart home doesn’t get hacked.
  • Scalability. Two aspects stand out here: first—the ability to add dozens or hundreds of devices to a smart home system at once without overloads and failures. The most popular protocols can handle this. The second is long-term scalability, meaning compatibility with a wealth of gadgets not only today but in a year, five, or ten. Many leading electronics manufacturers are tackling this “long-game” perspective now.

Smart home protocols serve to transfer data and ensure seamless operation of all system devices. If they do their job well, you won’t notice them—just like athletes and spectators don’t notice a referee who makes no mistakes and doesn’t interfere with the game. To extend the analogy, a smart home protocol is like a language for people or a road for a town.

2. Popular smart home protocols

Not long ago, Matter wasn’t among the most popular protocols, and Z-Wave was in the Top 5.

Today, when building home automation systems, the focus is on wireless data transmission, so the basic protocols include technologies familiar to most—Wi‑Fi and Bluetooth, specifically BLE—Bluetooth Low Energy. In addition, Zigbee and Thread are very popular, and the Matter standard is gaining momentum. Among other alternatives for smart homes, the Z‑Wave protocol stands out, as well as WiZ— a specialized lighting solution. There are other targeted communication standards and professional wired technologies (say, KNX for engineering systems).

Popular smart bulbs

3. Protocols and smart home ecosystems: what’s the difference?

Newcomers sometimes struggle with the abundance of smart home technologies and names. This often leads to confusion between protocols and ecosystems. Sure, people don’t confuse Zigbee or Bluetooth with Google Home or Apple HomeKit, but it’s easy to mix up protocols like WiZ—or the still fairly young Matter—with an ecosystem. The difference is significant:

  • Smart home protocols serve to transfer data (connectivity) between devices. A motion sensor detecting activity outside the house sends a Zigbee command to turn on the lights in a room (or trigger the alarm). For users, protocols are the “invisible” part. Think language or a road.
  • An ecosystem is a layer on top that simplifies setting up even complex interaction scenarios between different devices, and boosts user comfort with handy smartphone apps, voice assistants, etc. With ecosystems—say Apple HomeKit or Google Home—the user interacts directly through an intuitive interface. They’re the visible part of the smart home. Continuing the analogy, an ecosystem is like the Telegram messenger or Zoom app that lets us communicate. Or if the protocol is a road, the ecosystem is the supporting infrastructure and other layers—traffic rules, traffic lights, parking, gas stations, roadside cafes.

An ecosystem is a layer that gives you access to the smart home and convenient settings from your smartphone.
Important! Ecosystems can support different data transmission protocols. For example, Samsung’s SmartThings initially emphasized Zigbee and Z-Wave, while Google Home and Apple HomeKit focused on Wi‑Fi. Plus there was a trend toward closed systems, limiting device compatibility and automation capabilities overall. Now it’s different: the more “omnivorous” an ecosystem is, the easier it is for the user to work with a smart home. Still, if you have many devices with Zigbee and don’t plan to abandon them, until recently it was easier to unite them under Samsung’s ecosystem rather than Google or Apple. Only the launch and growing popularity of Matter helps remove this barrier. But let’s take it step by step.

4. Wi‑Fi and Bluetooth Low Energy protocols

The wireless data protocols Wi‑Fi and Bluetooth are well known and need no special introduction. We’ll simply list the pros and cons of each for building a smart home.

Pros of Wi‑Fi for a smart home: Cons of Wi‑Fi for a smart home:
  • wide availability;
  • high data transfer speeds;
  • familiar and understandable for users.
  • the need to use a router and increased load on it;
  • low energy efficiency—Wi‑Fi devices on batteries or accumulators drain quickly;
  • reduced stability due to various factors, from the “star” topology itself (two devices don’t interact directly but via the router) to interference, speed drops due to many clients, etc.

Many smart home devices rely on Wi‑Fi, including speakers, sockets, security cameras, various climate and kitchen appliances (air conditioners, ovens, refrigerators). But this protocol is definitely not the best choice for battery-powered sensors and systems with numerous nodes.

Pros of BLE for a smart home: Cons of BLE for a smart home:
  • low power consumption;
  • familiar and understandable for users;
  • easy to connect (no router setup needed).
  • short range;
  • relatively low data transfer speed;
  • not all Bluetooth devices support Mesh, which means a “star” topology and interaction via an intermediary (usually a smartphone).

The “star” topology distinguishes Wi‑Fi and BLE from the main rivals.

BLE is widely used in various autonomous sensors, and sometimes in smart bulbs and locks, and other compact gadgets. Overall, though, it loses out to Zigbee, Thread, etc.

Popular Wi‑Fi surveillance cameras

5. The Zigbee protocol

Zigbee is one of the most widespread and time-tested (in operation since 2004) wireless smart home protocols. Today, over a billion devices support it. Compared to Wi‑Fi and Bluetooth, it’s less known to the masses because it’s specialized—tailored for smart homes.

An even more important difference: Zigbee uses a mesh topology. Every node (device) can act as a signal repeater and interacts with others directly, so there’s no intermediary needed for data exchange. Mesh brings several benefits—expands coverage, mitigates interference risks (it uses the same 2.4 GHz frequency as Wi‑Fi and Bluetooth), and boosts fault tolerance. If one sensor’s battery dies or a bulb fails, an alternative chain is found through other nodes to deliver the signal.

Pros of Zigbee for a smart home: Cons of Zigbee for a smart home:
  • mesh topology (long range, fault tolerance, etc.);
  • low power consumption—battery sensors can work for up to 10 years;
  • scalability and wide availability, with lots of Zigbee devices from different manufacturers;
  • data security through encryption;
  • ability to operate locally—without an internet connection.
  • requires a dedicated hub (gateway). Without it, you can’t integrate into an ecosystem, use remote internet access, etc.;
  • compatibility issues can arise between brands. For example, a Xiaomi sensor may not always work correctly with a Philips bridge.

Many manufacturers’ devices support the Zigbee protocol.

Today, the protocol is supported by a wide range of gadgets, including lights from Philips Hue and IKEA Tradfri, numerous sensors from Aqara, Xiaomi, etc., smart sockets and switches, and some appliances and TVs (with a Zigbee module).

6. The Thread protocol

You could consider Thread an evolution of Zigbee—it launched in 2014. It also runs at 2.4 GHz and uses a mesh topology, so each node (device) extends coverage. Other core features—security and low power consumption—are preserved and even improved.

The key difference versus Zigbee is that Thread is based on IPv6. Thanks to this, each device is assigned its own IP address. Thus, nodes can not only exchange data with each other but also access the internet or local network, interact with cloud services, etc.—without complex conversions.

To make this work properly, you need a special element—a Thread Border Router—but it’s not a separate hub like in Zigbee; it’s a function. It can be added to gadgets via a firmware update. Today, Thread Border Router is built into current Google and Apple smart speakers by default, including the HomePod mini and other household devices, which simplifies building a smart home and avoids extra spending on gateways or hubs.

Pros of Thread for a smart home: Cons of Thread for a smart home:
  • mesh topology;
  • low power consumption;
  • scalability;
  • security.
  • fewer devices than Zigbee;
  • limited functionality.

Many makers of smart devices have actively developed and continue to develop the Thread protocol.

Let’s dwell a bit more on that last drawback. Usually, smart home protocols transfer data between devices and ensure they interact. That latter part is the “application layer,” and Thread doesn’t implement it. What does that mean in practice? For example, a temperature sensor “sees” other smart home devices and can relay signals through them but doesn’t implement even basic interaction options—it “doesn’t know” which node is nearby—a smart speaker or another sensor. For Thread to work fully, you need an ecosystem—platforms and apps like Google Home and Apple HomeKit.

Popular smart speakers

7. Other protocols

There are plenty of alternatives to Zigbee, Thread, or Wi‑Fi. For example, Z‑Wave is very similar to Zigbee and also requires a hub, but it has fewer device options. Other pros—energy efficiency, mesh topology and solid security—are present. The cons of Z‑Wave include differing operating frequencies by country and higher device costs compared to Zigbee.

There are also quite a few specialized protocols. For instance, WiZ is a smart lighting solution created by Philips. This protocol is considered local and simple. Other brands have their own developments, too—security systems specialist Ajax has two protocols: the wired Fibra and the wireless Jeweller. But these are closed standards limited to their own products. To integrate anything beyond Ajax, you’ll need additional modules.

It makes sense to consider rarer protocols in two cases—when you need a specialized smart home with a limited set of devices, or when you have genuinely deep expertise in automation projects (i.e., you’re not a beginner and know how to solve compatibility issues in practice).

8. The Matter protocol

Open Matter lets you combine devices that support different protocols.

Matter is the result of accumulated experience in building smart homes and the combined efforts of leading global brands, including Google, Apple, Amazon, Samsung, Schneider Electric, and others. The protocol is young—fully launched in 2022, though work began in 2019. Matter isn’t revolutionary or innovative by nature; it relies on existing solutions, including Thread and Wi‑Fi, as well as Bluetooth (used for initial device setup). It was created with one goal—to “make friends” of devices from different manufacturers, ensure broad compatibility, and make smart home building as simple as possible.

By the way, if Thread is primarily about transport (data transmission), not about interaction, Matter is about the application layer—enabling “communication” between devices, whether they’re from Google, Apple, Samsung, or Aqara. Integrating Thread gadgets into a Matter smart home is seamless, as the protocols are natively compatible. At most, you’ll need a firmware update on the Thread device. With Zigbee sensors, integration with Matter happens via a gateway. But that doesn’t have to be another device. It’s assumed your existing Zigbee hub will get Matter support via software.

The diagram shows how Matter unifies the most common protocols.

For clarity, let’s use analogies again. If earlier smart home protocols were the language, Matter is the universal translator. It “sets up” interactions between “different languages”—devices from different brands and protocols. If a protocol is a road, Matter is the navigator that can route you over older pavement (Zigbee) or newer (Thread).

Pros of Matter for a smart home: Cons of Matter for a smart home:
  • All the strengths of the best predecessor protocols, including mesh topology, even stronger security, and local operation.
  • Flexibility. Devices that need fast data transmission (e.g., TVs or ovens with a built-in camera) connect via Wi‑Fi, while battery-powered sensors use power-sipping Thread.
  • Maximum compatibility, as Matter is an open protocol. You don’t have to buy all-new devices—you can integrate most existing ones. The same goes for ecosystems. Matter works with HomeKit, Google Home, and other platforms, and doesn’t rule out parallel use. For instance, a husband—an Android fan—can control devices via Google Home and Assistant, while a wife—an iPhone lover—can give commands with Siri.
  • Future-proof. Leading manufacturers are betting on Matter, so the protocol is expected to spread quickly.
  • For now, a limited selection of devices with native Matter support. The lineup is growing rapidly, though.
  • Other growing pains. Until Matter 2.0, the protocol doesn’t support security cameras and some other devices. Right after major updates, stability issues are possible.

The Matter logo on the box means a device natively supports another gadget with the same protocol.

The shift to Matter is a 2025 trend. Current products from TP-Link and Tuya support it, as do the Google Nest Wifi Pro router, the Apple TV 4K 64GB media player, and TVs from leading manufacturers, for example the Samsung QE-55S90D and Philips 55OLED769. These TVs can serve as the control center for a Matter smart home.

We’ve summarized the key features of the most popular protocols in a handy table:

Zigbee Thread Matter
Debut, year 2004 2014 2022
Topology mesh mesh Mesh + Wi‑Fi (star) topology
Internet connection via gateway (hub) direct, over IP direct, over IP
Energy efficiency high very high depends on transport; via Thread—very high
Data rate, Kbit/s 250 250 250 for Thread and hundreds of Mbit/s for Wi‑Fi
Compatibility with Zigbee devices with Thread devices with various devices
Current device lineup large medium small but growing rapidly
Security AES‑128 encryption AES‑128 encryption and IP authentication end-to-end encryption
Status the most reliable, time-tested protocol foundation for Matter the most universal and forward-looking protocol
Popular smart hub

9. Why the future of the smart home belongs to Matter

Right now, Zigbee is a reliable, mature technology with plenty of devices you can integrate into a smart home. But the need for a hub and compatibility issues across manufacturers pushed many market players to look for alternatives. Thread didn’t become a full-fledged Zigbee rival: it needs a higher-level layer likely envisioned in ecosystems. But that approach also led to fragmentation (forcing a choice between Apple or Google platforms), not unification.

What the spread of Matter promises in a “before-and-after” format.

As a result, major manufacturers opted for change and developed the new Matter protocol. It truly is open—this isn’t just marketing—which lets it run on top of other well-known data exchange technologies, including Thread and Wi‑Fi. In 2025, not all devices support Matter yet, but the “big four” (Apple, Google, Amazon, Samsung) and other serious players, including Philips and Aqara, are betting on it.

The table shows how key tech giants’ smart home strategies have evolved:

Player Initial stage, until early 2020s Transition stage, turn of the decade Situation as of 2025
Apple Bet on Wi‑Fi and Bluetooth plus a closed proprietary ecosystem Move to Thread, participation in developing Matter Bet on Matter and Thread, opening the ecosystem to third-party devices
Google Focus on Wi‑Fi Move to Thread, participation in developing Matter Bet on Matter and Thread
Amazon Bet on Zigbee. Use of Wi‑Fi Gradual move to Thread Emphasis on Matter
Samsung Hybrid approach developing Zigbee, Z‑Wave, and Wi‑Fi Step back from Z‑Wave, gradual move to Thread Multifaceted development of Matter + Thread + Zigbee

If market leaders stick to these trends, Matter will push out Zigbee and become the most widespread, go-to protocol for building smart homes in the coming years. Today it’s considered the most promising and universal. With Matter, users can build a smart home from devices by different manufacturers without worrying about intermediaries (gateways and hubs), compatibility problems, or being locked into a single ecosystem for control.