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Displays · Head to head

Amazon Echo Show 21 vs Amazon Echo Show 8 (3rd Gen)

Full Smart Displays comparison in 2026

Updated September 2026
Data from Amazon.
2026 verdict
Amazon Echo Show 21 is the pick of these two Alexa smart displays when screen size matters, with a 21-inch Full HD screen and 6 GHz Wi-Fi.
Amazon Echo Show 21
Winner
Amazon Echo Show 21
$349.99$499.9930% OFF
Buy on Amazon USACheck price
It adds a wall mount and built-in Fire TV, turning it into a kitchen TV and family noticeboard, while the Amazon Echo Show 8 (3rd Gen) offers an 8-inch 1280 x 800 screen meant for a counter or nightstand. Underneath they match: both have a camera with a physical shutter, a motion sensor, Alexa and a Zigbee coordinator, Thread border router and Matter bridge. The Amazon Echo Show 8 (3rd Gen) is far more affordable, weighs about a fifth as much and is praised for its room-filling spatial audio, where Amazon Echo Show 21 owners often add a soundbar. Buy the Amazon Echo Show 21 to replace a kitchen TV, and the Amazon Echo Show 8 (3rd Gen) for a compact display that sounds great.
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FeatureAmazon Echo Show 21Amazon Echo Show 8 (3rd Gen)Winner
Price$349.99$149.99Amazon Echo Show 8 (3rd Gen)
Connectivity2.4 GHz WiFi, 5 GHz WiFi, 6 GHz WiFi, Bluetooth2.4 GHz WiFi, 5 GHz WiFi, BluetoothAmazon Echo Show 21
Screen Size21"8"Amazon Echo Show 21
Rating4.44.4Tie
Warranty1 year1 yearTie
IntegrationsAlexa, Home AssistantAlexa, Home AssistantTie
HubZigbee Coordinator, Thread Border Router, Matter BridgeZigbee Coordinator, Thread Border Router, Matter BridgeTie
Voice AssistantAmazon AlexaAmazon AlexaTie
CameraYESYESTie
SensorsMotion, Ambient LightMotion, Ambient LightTie

What the differences mean

Screen

21 inches at 1920 x 1080 against 8 inches at 1280 x 800. The Amazon Echo Show 21 is readable from across a room and big enough to watch shows on; the Amazon Echo Show 8 (3rd Gen) is a screen you glance at up close.

How big is the Echo Show 21

The Amazon Echo Show 21 measures 540 x 350 x 38 mm, the footprint of a small TV, and is meant for a wall or a stand. The Amazon Echo Show 8 (3rd Gen) measures 200 x 139 x 106 mm and weighs 1034 g, a counter or nightstand device.

Placement

The Amazon Echo Show 21 wall-mounts; the Amazon Echo Show 8 (3rd Gen) has no wall mount option and sits on a surface.

Wi-Fi

The Amazon Echo Show 21 adds 6 GHz Wi-Fi to the 2.4 and 5 GHz bands both support, useful with a Wi-Fi 6E router in a crowded network.

What stays the same

Camera with a physical off switch, motion sensor, Alexa, and the Zigbee, Thread and Matter hub are identical, so moving between them changes the screen, not the smart home side.

Which one to buy if

What owners say

Owners of both Echo displays share two things: they use them as a smart home dashboard that shows Ring and other camera feeds, and they are frustrated with Alexa+, which Amazon Echo Show 21 owners describe as misreading words and refusing portrait mode, and Amazon Echo Show 8 (3rd Gen) owners blame for breaking speaker groups and music preferences. Where they differ is sound and scale. Amazon Echo Show 8 (3rd Gen) owners single out spatial audio that fills a room and a snappy processor, but find multi-room audio drifts out of sync. Amazon Echo Show 21 owners love a screen readable across the room, Fire TV that streams every major app, synced calendars and a photo frame that looks like art, yet call the built-in sound only okay and report updates that broke features such as album art.

Upgrading from the Amazon Echo Show 8 (3rd Gen)?

Going from the Amazon Echo Show 8 (3rd Gen) to the Amazon Echo Show 21 is not a step up in the smart home: the camera, the motion sensor, Alexa and the Zigbee, Thread and Matter hub are the same. What changes is the screen, from 8 inches to a 21-inch Full HD panel with Fire TV, plus a wall mount and 6 GHz Wi-Fi. Make the move if you want the display to become your kitchen TV and family calendar. If you mostly use your Echo Show 8 for music, timers and a quick look at a camera, keep it.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Amazon Echo Show 21
  • Amazon Echo Show 8 (3rd Gen)

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Frequently Asked Questions

Which is better: Amazon Echo Show 21 or Amazon Echo Show 8 (3rd Gen)?

The Amazon Echo Show 21 if you want a big screen: 21 inches at Full HD, 6 GHz Wi-Fi, a wall mount and Fire TV. The Amazon Echo Show 8 (3rd Gen) is the better choice for a compact, more affordable display with strong sound.

How big is the Amazon Echo Show 21 compared to the Amazon Echo Show 8 (3rd Gen)?

Much bigger. The Amazon Echo Show 21 has a 21-inch screen in a 540 x 350 x 38 mm body, while the Amazon Echo Show 8 (3rd Gen) has an 8-inch screen in a 200 x 139 x 106 mm body that weighs 1034 g.

Do the Amazon Echo Show 21 and the Amazon Echo Show 8 (3rd Gen) have the same smart home hub?

Yes. Both are Zigbee coordinators, Thread border routers and Matter bridges, so the choice between them comes down to the screen, not the hub.

Can the Amazon Echo Show 8 (3rd Gen) be mounted on a wall?

It has no wall mount option and sits on a surface. The Amazon Echo Show 21 is the one of the two designed to go on a wall.

Who should buy the Amazon Echo Show 21?

Alexa households that want one large screen in the kitchen or a common room to stream shows, keep a family calendar, display photos and watch camera feeds.

Who should buy the Amazon Echo Show 8 (3rd Gen)?

Anyone who wants a compact Alexa display with a camera, good sound and a full Zigbee, Thread and Matter hub for a kitchen counter, desk or nightstand.

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