Amazon Echo Show 15 vs Amazon Echo Show 21

The Amazon Echo Show 21 is better overall mainly for its larger 21-inch screen. The Amazon Echo Show 15 is the more affordable option, and the two are otherwise closely matched wall-mounted Alexa displays.

Screen size and price. The Echo Show 21 has a 21-inch Full HD display, while the Echo Show 15 has a smaller 15.6-inch screen and costs less. Both offer Fire TV, wall mounting, a camera, and a full hub.

Yes. Both the Echo Show 15 and the Echo Show 21 have built-in Fire TV for streaming and include a Zigbee coordinator, Thread border router, and Matter bridge for directly controlling smart home devices.

Yes. Both are designed to be wall-mounted, though the Echo Show 21 is larger and heavier, so it needs more wall space than the Echo Show 15.

Buy the Echo Show 21 if you want the biggest wall-mounted display to replace a kitchen or living-room TV and run the family calendar, and the larger screen is worth the higher price.

Buy the Echo Show 15 if you want the same Fire TV, camera, and full hub in a more affordable, slightly smaller 15.6-inch wall-mounted display.