Plugs · Head to head

Amazon Smart Plug vs TP-Link Kasa EP40

Full Smart Plugs comparison in 2026

Updated October 2026
Data from the official Amazon and TP-Link sites.
2026 verdict
For an outdoor outlet, the TP-Link Kasa EP40 is the better smart plug of this pair.
TP-Link Kasa EP40
Winner
TP-Link Kasa EP40
$22.99$24.998% OFF
Buy on Amazon USA
It puts two independently switched sockets inside an IP64 housing that owners run through Canadian winters, works with Alexa, Google Home, SmartThings and Home Assistant, and carries a two-year warranty. The Amazon Smart Plug is the simpler indoor plug: it is set up by an Echo in seconds inside the Alexa app and runs schedules and routines reliably, but it is a single indoor socket limited to Alexa, with no metering and no Matter. Take the TP-Link Kasa EP40 for a patio, a yard or anything two devices, and the Amazon Smart Plug for a lamp or fan in an Alexa home that wants the easiest setup going.
Amazon Smart Plug
Amazon
#2 Best Seller in Plugs

Amazon Smart Plug

Prime exclusive deal
$24.99
Buy on Amazon USA
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FeatureAmazon Smart PlugTP-Link Kasa EP40Winner
Price$24.99$22.99TP-Link Kasa EP40
Rating4.74.6Amazon Smart Plug
Warranty1 year2 yearsTP-Link Kasa EP40
Weather ResistanceNOIP64TP-Link Kasa EP40
IntegrationsAlexaGoogle Home, Alexa, Samsung SmartThings, Home AssistantTP-Link Kasa EP40
Plug FormatType BType BTie
Energy MonitoringNONOTie
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
Zigbee RouterNONOTie

What the differences mean

Indoor or outdoor

The TP-Link Kasa EP40 is IP64 rated against dust and splashing water and is built to live outside, with covers for unused sockets. The Amazon Smart Plug is specified for indoor use only and has no weather resistance at all.

Number of outlets

The TP-Link Kasa EP40 controls two grounded sockets, each with its own button, schedule and timer, so two things can run independently. The Amazon Smart Plug controls a single socket, so it handles one device.

Smart home platforms

The Amazon Smart Plug is an Alexa accessory and nothing else, with no Google Home, Apple Home, SmartThings or Matter support. The TP-Link Kasa EP40 works with Alexa, Google Home, SmartThings and Home Assistant.

Energy monitoring

Neither plug meters energy: the TP-Link Kasa EP40 and the Amazon Smart Plug can switch a load and run schedules but cannot report what it draws. For consumption data you need a different plug on either side.

Warranty

The Amazon Smart Plug carries a one-year warranty. The TP-Link Kasa EP40 comes with two years, which is a meaningful difference for a device that sits outside in the weather.

Load rating

The Amazon Smart Plug is rated 15A on a 120V supply, suitable for lamps, fans, purifiers and diffusers. The TP-Link Kasa EP40 is rated 15A and 1875W on 110 to 125V, enough for outdoor lighting, decorations and a small pump.

Which one to buy if

What owners say

Both groups describe a plug that behaves, but they reward different things. Amazon Smart Plug owners lead with setup: an Echo finds it almost as soon as it is plugged in, sometimes without opening a manual, and they trust the schedules and routines to run day after day, including for older users who want a hard-to-reach lamp on a voice command. Their complaints are that it is Alexa only, bulkier than rivals, and unable to measure anything. TP-Link Kasa EP40 owners talk about the housing instead, calling it heavy and weatherproof, and report it working outdoors for years and through deep cold, with the two sockets each having a button and its own schedule; a few mention connection hiccups or the need to keep unused sockets covered.

Frequently Asked Questions

Which is better overall: Amazon Smart Plug or TP-Link Kasa EP40?

They fit different jobs. The TP-Link Kasa EP40 is the better plug overall, with two outlets, an outdoor IP64 body, four platforms and a two-year warranty. The Amazon Smart Plug is the easier indoor pick for an Alexa household that wants the simplest setup for one lamp or fan.

What is the biggest difference between the Amazon Smart Plug and the TP-Link Kasa EP40?

Where it can live and how many things it controls. The Amazon Smart Plug is a single indoor socket tied to Alexa, while the TP-Link Kasa EP40 is an outdoor IP64 plug with two independently switched outlets and support for Alexa, Google Home, SmartThings and Home Assistant.

Do either of these plugs measure energy use?

No. Neither the Amazon Smart Plug nor the TP-Link Kasa EP40 has energy monitoring, so both can switch a device and run schedules but cannot report its consumption.

Which one works with Google Home or SmartThings?

The TP-Link Kasa EP40, which supports Alexa, Google Home, SmartThings and Home Assistant. The Amazon Smart Plug works with Amazon Alexa only, with no Google Home, Apple Home, SmartThings or Matter.

Who should buy the Amazon Smart Plug?

An Alexa household that wants one indoor lamp, fan or diffuser on voice control and a schedule with the least possible setup, especially for older or less technical users.

Who should buy the TP-Link Kasa EP40?

Anyone switching outdoor lighting, decorations or a small pump, or wanting two independent sockets that survive rain and cold on any of the major platforms.

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