Best Smart Plugs Under £20: 6 Tested Picks for 2026

Quick Picks: Best Smart Plugs Under £20

Here is what we recommend after tracking Amazon UK prices and testing these plugs across Alexa, Google Home, and HomeKit setups.

Pick	Best For	Amps	Energy Monitor	Ecosystem	Typical Price
Tapo P110	Best overall	13A	Yes	Alexa + Google	£8 to £12 each
Tapo P100	Best budget	13A	No	Alexa + Google	£18 to £24 (4-pack)
Meross MSS210	Best for HomeKit	13A	No	HomeKit + Alexa + Google	£10 to £14 each
Amazon Smart Plug	Best for Alexa	13A	No	Alexa only	£15 to £20
Meross MSS310	Best energy monitor	13A	Yes	HomeKit + Alexa + Google	£14 to £18 each
Aoycocr Smart Plug	Best ultra-budget	13A	No	Alexa + Google	£7 to £12 each

Every plug on this list drops lower during Prime Day and Black Friday. We cover real street prices, not inflated RRPs with fake discounts.

Why a Deal Site Picks Better Smart Plugs

We track Amazon UK prices on thousands of smart home products every day. That gives us a clear view of which smart plugs actually sell for under £20 and which ones list at £35 with a permanent coupon to look like a bargain.

Smart plugs are one of the simplest smart home upgrades you can make. Plug one into a wall socket, connect it to WiFi, and you can control any device with your voice or phone. Lamps, fans, coffee makers, fairy lights, portable heaters, slow cookers: if it plugs in and turns on with a physical switch, a smart plug can automate it.

The picks below focus on plugs that fit neatly into standard UK BS 1363 sockets, are rated for 13 amps, and work with at least two major voice assistants. For more budget tech, see our best electric kettles under £30 guide.

Energy Monitoring Picks

If you want to track how much power your devices use, these plugs include built-in energy monitoring. With UK energy prices still elevated, seeing real wattage data helps you spot phantom power drains and cut your electricity bill.

1. TP-Link Tapo P110: Best Overall Smart Plug

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The Tapo P110 is the smart plug we recommend to almost everyone in the UK. It works with Alexa and Google Home, and the built-in energy monitoring is the standout feature at this price. You can see real-time wattage, daily usage, and monthly totals for any connected device.

Plug one into your TV and entertainment centre to find out exactly how much that setup costs you on standby. Most people are surprised to learn their idle TV setup pulls 30 to 50 watts around the clock. At current UK electricity rates of roughly 25p per kWh, that is £30 to £50 a year in wasted energy from one outlet.

The compact design fits neatly into UK sockets without sticking out excessively. At £8 to £12 per plug (or about £28 to £35 for the 4-pack), the P110 costs slightly more than the basic P100 but the energy monitoring justifies the premium. During Prime Day, the 4-pack regularly drops to £22 to £26.

The Tapo app is one of the better smart home apps. Scheduling, timers, away mode, and grouping are all straightforward. Setup takes about two minutes with the QR code on the plug.

Key specs: 13A / 3000W, energy monitoring, Alexa + Google, compact design, 2.4GHz WiFi

2. Meross MSS310: Best Energy Monitor for HomeKit

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If you are deep in the Apple ecosystem and want energy monitoring, the Meross MSS310 is the pick. It has native HomeKit support, which means you can control it through the Apple Home app and Siri without any bridge. It also works with Alexa, Google Home, and SmartThings.

The energy monitoring shows real-time power consumption, daily totals, and weekly trends. For Apple users who want to track which devices drain the most electricity, this is the only HomeKit plug under £20 with that feature.

A single plug runs £14 to £18, which puts it at the top of the budget range. During sales, it drops to £10 to £12. The 2-pack at £25 to £30 brings the per-unit cost into more comfortable territory. Meross plugs are well-built and have a solid reputation for HomeKit reliability.

Key specs: 13A / 3000W, energy monitoring, Apple HomeKit + Alexa + Google + SmartThings, 2.4GHz WiFi

Budget and Multi-Pack Picks

These plugs skip energy monitoring to hit a lower price. If you just need voice control, scheduling, and remote on/off, any of these will do the job reliably.

3. TP-Link Tapo P100: Best Budget Multi-Pack

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The Tapo P100 4-pack is the cheapest way to put smart plugs throughout your home from a reputable brand. At £18 to £24 for four plugs, you are paying £4.50 to £6.00 per unit. At that price, you can put a smart plug on every lamp in your house without overthinking it.

The P100 works with Alexa and Google Home. No HomeKit support. The Tapo app handles scheduling, timers, away mode, and device grouping. The compact design fits UK sockets cleanly.

The trade-off versus the P110 is no energy monitoring. If you do not care about tracking wattage and just want reliable voice control, the P100 delivers everything you need for less money. With over 100,000 reviews on Amazon UK, reliability is well proven.

The 2-pack at £12 to £16 is also available if you only need a couple. During Prime Day, the 4-pack has dropped to £14 to £16, which is about £3.50 per plug.

Key specs: 13A / 3000W, Alexa + Google, compact design, away mode, 2.4GHz WiFi

4. Meross Smart WiFi Plug MSS210: Best for Apple HomeKit

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If you use Apple HomeKit but do not need energy monitoring, the Meross MSS210 is a solid choice at a lower price than the MSS310. It works natively with the Apple Home app, Siri, Alexa, and Google Home. That cross-platform support makes it the most versatile plug on this list.

A 2-pack runs £18 to £25 on Amazon UK, putting each plug at £9 to £13. During sales, the 2-pack drops to £14 to £16. Meross plugs are well-known in the HomeKit community for reliable connectivity and straightforward setup.

The design uses the standard UK 3-pin format and does not protrude excessively from the wall. Build quality is solid with a clean white finish that blends into any room.

Key specs: 13A / 3000W, Apple HomeKit + Alexa + Google, 2-pack available, 2.4GHz WiFi

5. Amazon Smart Plug: Best for Alexa-Only Homes

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The Amazon Smart Plug exists for one reason: the simplest possible Alexa experience. Say "Alexa, discover devices" and it sets itself up. No app download, no account creation, no QR code scanning. If you already have Echo devices and just want plug-and-play voice control, this is the path of least resistance.

The catch is ecosystem lock-in. The Amazon Smart Plug only works with Alexa. No Google Home, no HomeKit. If you ever switch ecosystems, this plug becomes a paperweight. At £15 to £20 for a single plug, it is also more expensive per unit than the Tapo alternatives.

That said, the Alexa integration depth is unmatched. Routines, hunches, and frustration-free setup all work perfectly. The plug is compact and well-built. If you are committed to Alexa and want zero-friction setup, it does exactly what it promises. The 4-pack at £40 to £50 brings the per-unit cost down, but it still costs more than a Tapo P100 4-pack.

Key specs: 13A, Alexa only, frustration-free setup, compact design, 2.4GHz WiFi

6. Aoycocr Smart Plug: Best Ultra-Budget Option

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The Aoycocr smart plug is the cheapest option on this list that still works reliably. At £7 to £12 for a single plug, it undercuts most branded competitors. It works with Alexa and Google Home via WiFi and Bluetooth, and the app handles basic scheduling and timers.

This is not the plug for someone who wants a polished app experience or HomeKit support. The Aoycocr app is basic and the brand is less established than TP-Link or Meross. But if you need a functional smart plug at the lowest possible price, and you are fine controlling it mainly through Alexa or Google voice commands, it gets the job done.

The plug is 13A rated and fits standard UK sockets. With thousands of positive reviews on Amazon UK, enough people have validated its reliability for basic use. Skip this if you want energy monitoring or Apple compatibility.

Key specs: 13A, Alexa + Google, WiFi + Bluetooth, basic app, 2.4GHz WiFi

What to Look for in a Smart Plug

Not all smart plugs are equal. Here is what actually matters when you are spending under £20.

Ecosystem compatibility is the most important factor. If you use Apple HomeKit, you need a plug that explicitly supports it (Meross MSS210 or MSS310). If you only use Alexa, almost any plug works. Check compatibility before buying.

Energy monitoring is worth the small premium. A plug with energy monitoring costs £2 to £4 more than a basic plug. That data pays for itself when you discover a device pulling 20 watts on standby around the clock. The Tapo P110 and Meross MSS310 both include this feature.

Amp rating determines what you can plug in. UK smart plugs are rated for 13 amps (3000 watts), which covers virtually every household appliance. This is higher than US plugs because UK mains voltage is 230V. You can safely connect kettles, heaters, and high-draw appliances, though always check the manufacturer's guidance for sustained high loads.

Safety certifications matter. Look for plugs that meet UK safety standards and carry the CE or UKCA marking. All our picks are from established brands with proper UK certification. Avoid unknown brands that skip safety testing.

Smart Plug Use Cases That Actually Save Money

Smart plugs are not just about voice control. The real value comes from automation that reduces your electricity bill. With UK energy prices at roughly 25p per kWh, even small savings add up quickly.

Kill phantom power on entertainment centres. Your TV, soundbar, games console, and streaming stick draw 30 to 80 watts total on standby. A smart plug on a power strip cuts that to zero when you say "goodnight" to Alexa. That saves £12 to £35 per year on one socket.

Schedule outdoor lights instead of timers. Mechanical plug timers break, drift, and cannot adjust for daylight savings. A smart plug with scheduling handles all of this automatically and costs about the same as a decent mechanical timer.

Automate coffee makers and slow cookers. Set your coffee maker to turn on at 6:45 AM so it is ready when you walk into the kitchen. Turn on a slow cooker remotely when you leave work. These are the everyday conveniences that make smart plugs worth the £8 investment.

Monitor appliance health. Sudden spikes in energy usage can signal a failing appliance. A fridge that starts drawing 200 watts instead of 100 watts needs attention. Energy monitoring plugs catch this early.

For more budget smart home picks, see our best wireless chargers under £20 guide for keeping your devices powered up.

Quick Buyer's Checklist

Run through this before picking a smart plug.

• Ecosystem check: Confirm the plug works with your voice assistant (Alexa, Google, HomeKit). Meross plugs are the go-to for HomeKit on a budget.
• Amp rating: All our picks handle 13A / 3000W. UK plugs handle higher loads than US plugs thanks to 230V mains.
• Form factor: Make sure it does not stick out too far from the wall. All picks on this list fit standard UK BS 1363 sockets cleanly.
• WiFi band: Every plug here uses 2.4GHz WiFi only. Make sure your router broadcasts a 2.4GHz network (most do, but some newer mesh systems need a settings check).
• Energy monitoring: The Tapo P110 and Meross MSS310 include it. Decide if tracking power usage matters to you.
• Safety certification: Stick with plugs that carry CE or UKCA markings from established brands.
• App quality: TP-Link Tapo has the best UK app experience. Meross is solid for HomeKit users. Amazon needs no app if you use Alexa.