Amazon's Echo Show 21, the company's largest and most ambitious smart display to date, is currently available for $319.99 at Best Buy and Home Depot—a $80 discount that matches its lowest price ever. The deal, reported by The Verge and others, comes as the device continues to garner praise for its versatility as a smart home hub, kitchen TV, and digital photo frame. But beyond the sale, the Echo Show 21 represents a pivotal moment in Amazon's strategy to dominate the smart home ecosystem, blending a 21-inch 1080p display with robust support for Matter, Thread, and Zigbee protocols.

What Is the Echo Show 21?

Launched alongside the updated Echo Show 15 in late 2024, the Echo Show 21 is a wall-mountable smart display that functions as a central command center for connected devices. Its 21-inch screen is designed for visibility from across the room, making it suitable for kitchens, living rooms, or home offices. According to Tom's Guide, the device doubles as a Fire TV, allowing users to stream content from Netflix, Prime Video, and other services. TechRadar notes that while it won't replace a dedicated television, its integration with Alexa and smart home controls transforms how users interact with their environment.

“The Echo Show 21 is all of those things in one, with a huge 21-inch screen. You can use it to control your smart lights, glance at recipes, watch TV shows, and more.” — The Verge

Smart Home Capabilities: Matter, Thread, and Zigbee

One of the standout features of the Echo Show 21 is its support for multiple smart home protocols. PCMag highlights that the device acts as a Matter and Thread controller, enabling local control of compatible devices without relying on cloud servers. This reduces latency and improves reliability. The inclusion of Zigbee further expands compatibility with older smart home devices. Reviewed.com calls it a “future-proof” choice for those building a smart home.

However, not all reviews are unanimous. TechRadar's review of the Echo Show 15 (Gen 2) points out that the device struggles to excel as either a Fire TV or a smart home hub, falling into a “middle of the road” category. The Echo Show 21, with its larger screen and improved internals, seems to address some of those criticisms, but some users may still find it lacks the dedicated functionality of a standalone streaming device or a purpose-built hub.

Alexa+ and the AI Upgrade

With the rollout of Alexa+, Amazon's generative AI-powered assistant, the Echo Show 21 gains enhanced conversational abilities. T3.com reports that Alexa+ improves the smart display experience by making interactions more natural and context-aware. PCMag's review of the Echo Show 8 with Alexa+ describes it as a “game changer,” noting that the AI can now understand follow-up questions and perform multi-step tasks. This upgrade is expected to roll out to the Echo Show 21, further cementing its role as a smart home brain.

Privacy Concerns and Trade-offs

Despite the advancements, privacy remains a concern. TechRadar's review of the Echo Show 8 (4th gen) criticizes Amazon for removing a physical camera shutter, a feature many privacy-conscious users consider essential. The Echo Show 21 includes a built-in 13-megapixel camera with auto-framing for video calls, but the lack of a shutter on some models may deter users. Amazon has stated that the camera can be disabled via software, but critics argue that a physical cover is more reassuring.

Comparison with Other Smart Displays

The Echo Show 21 competes directly with Google's Nest Hub Max and Lenovo's Smart Display, though Google recently announced it will end software updates for older third-party smart displays, as reported by PCMag. This could push users toward Amazon's ecosystem. Wired's smart home expert recommends the Echo Show 21 for its size and protocol support, while Tom's Guide lists it among the best smart displays of 2026. For those on a budget, the Echo Show 15 (currently $299.99) offers a similar experience in a smaller form factor.

Deals and Availability

The $319.99 price is available at Best Buy and Home Depot, with the adjustable stand sold separately (also discounted). The Verge notes that a bundle with the stand has seen its biggest discount yet. Other retailers may offer similar pricing during promotional events. As with any smart home purchase, buyers should consider their existing ecosystem—Amazon's Alexa vs. Google Assistant—before committing.

The Bottom Line

The Echo Show 21 is a compelling option for anyone looking to centralize their smart home control. Its large screen, multi-protocol support, and AI-powered Alexa make it a versatile addition. However, potential buyers should weigh the privacy trade-offs and consider whether a dedicated TV or hub might better suit their needs. At its current discount, it's an attractive entry point into Amazon's smart home universe.