What is Amazon Alexa?

Amazon Alexa is Amazon's voice assistant and the smart home platform built around it. You talk to Alexa through an Echo speaker or display, or type to it in the Alexa app on your phone, and it plays music, answers questions, runs timers and controls your smart devices. Its main draw is reach: Alexa works with one of the broadest ranges of third-party smart home gear of any platform, from lights and plugs to locks, cameras and TVs.

Alexa, Echo and the app: how it fits together

Three things share the Alexa name, loosely. Alexa is the assistant, the voice that answers. Echo is Amazon's hardware brand, the speakers and displays Alexa lives on. And the Alexa app is where you set devices up, build routines and, increasingly, type to Alexa directly. You do not strictly need an Echo, since plenty of third-party speakers and TVs have Alexa built in, but an Echo is the usual way in.

The Echo range and hubs

The Echo line spans a wide range of prices. At the small end are the Echo Pop and Echo Dot, palm-sized speakers for a bedroom or hallway. The Echo Show adds a screen for video calls, recipes and camera feeds, in sizes from the compact Show 5 up to the larger Show 11 and Show 15. The Echo Studio is the big speaker for sound, and the Echo Hub is a wall-mounted panel built specifically to run a smart home.

Some of these double as a smart home hub. The Echo (4th generation), the Echo Show 10, the Echo Studio and the Echo Hub have a Zigbee radio built in, so Zigbee sensors and bulbs can pair straight to them without a separate bridge. Several also act as a Thread border router for newer Matter devices. If a built-in hub matters to you, check the specific model, because the cheapest Echoes leave the radios out.

Alexa+: the AI upgrade

In 2025 Amazon began rolling out Alexa+, a rebuilt version powered by generative AI. It is meant to be more conversational, to remember context, and to carry a task across your Echo, your phone and the web. It also adds agentic "experts" that can act for you, booking a table or reordering groceries, rather than just answering.

Alexa+ launched in Australia on 5 August 2026, though as an invitation-based Early Access programme rather than a full release. It costs nothing while Early Access runs, and afterwards it is included with Amazon Prime, or A$29.99 a month without. Regular Alexa keeps working either way, including on the older Echo hardware that is not eligible for Alexa+. We track what changes each month in our Alexa update hub.

What works with Alexa

Alexa's real strength is compatibility. It is a Matter controller, so Matter lights, plugs, locks and sensors pair directly, and a Matter device can be shared with Alexa, Apple Home and Google Home at the same time. The hub-equipped Echoes also pair Zigbee gear directly, and support Thread for Matter-over-Thread devices.

Beyond Matter, Alexa has Skills: small add-ons built by other companies that teach Alexa new tricks, from a news briefing to controlling a particular brand of appliance. Amazon's own Ring doorbells and Blink cameras tie in closely, so you can pull up a doorbell feed on an Echo Show. And because so many products carry a "works with Alexa" badge, Alexa often slots in alongside another system rather than replacing it.

The cloud and your privacy

Alexa is cloud-first. The Echo listens locally for its wake word, but once you start talking, the request goes to Amazon's servers to be understood. That is what lets Alexa answer almost anything, but it also means Alexa needs the internet to do most of its job, and your voice requests pass through Amazon. In 2025 Amazon removed a setting that a few US Echo models had offered to keep that processing on the device, so all Echoes now work this way. You can still delete your voice history and set it to delete automatically in the app. Matter devices are the exception to the cloud reliance: once set up, they can be controlled locally over your own network.

Where Alexa falls short

Alexa's openness comes with rough edges. The always-listening design occasionally trips on a word from the telly and wakes by mistake. Echo Show displays have drawn criticism for pushing ads and shopping suggestions, and the Alexa app nudges you towards Amazon's store. And because everything routes through Amazon's cloud, Alexa is a poor fit if local control and privacy are your priority: for that, Apple Home keeps more on-device, and Home Assistant runs entirely on hardware you own.

Who Alexa is for

Alexa suits people who want to control their home by voice, value the widest possible device compatibility, and like that Echo hardware is cheap and frequently on sale. It is a natural fit for existing Amazon and Prime customers, and for anyone happy to lean on the cloud in exchange for reach and convenience. If you want everything private and local, or you are already deep in Apple's world, another platform will suit you better.

How Alexa compares

Here is how the five main smart home platforms line up.