Best Smart Plugs for Energy Monitoring 2026

Your TV is probably costing you more than you think. Most 65-inch sets draw 40-80W in standby — every hour, quietly. The gaming PC left on sleep mode. The mini-fridge in the garage. The space heater on a timer someone set two winters ago and never revisited. The only way to know is to measure.

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Smart plugs with energy monitoring sit between your outlet and your device, track power draw in real time, and report it back to an app. The data alone changes behavior. When you can see that your home office monitor draws 28W in standby overnight, you start scheduling it off.

The problem is most energy monitoring plugs are ugly. Thick, industrial-white blocks that jut from the wall and swallow the second outlet. The five picks below don't have that problem.

What Makes a Smart Plug Good at Energy Monitoring?

The best smart plugs for energy monitoring measure power draw in real time (not averaged), report historical usage to an app, and support Matter for compatibility with any smart home platform. Measurement accuracy to 0.1W matters — plugs that round to the nearest watt miss the phantom loads worth caring about. Local processing is a bonus for privacy-conscious buyers. And size matters: a plug that blocks the adjacent outlet is only half-useful.

The 5 Best Smart Plugs for Energy Monitoring in 2026

1. Kasa EP25 — Best Overall

At $18, the Kasa EP25 does everything you'd want from an energy monitoring smart plug. It's Matter-certified, which means it works with Apple Home, Google Home, Amazon Alexa, and Samsung SmartThings — pick one or use all four simultaneously. Energy monitoring is accurate to 0.1W and reports in real time via the Kasa app, which tracks daily, weekly, and monthly usage with full historical graphs.

The design is worth calling out. Compact square, matte white, doesn't shout "smart gadget." More importantly, it doesn't block the second outlet. That sounds minor until you're standing in front of a double socket trying to fit two plugs.

It runs on Wi-Fi, so it adds one more device to your network. For most setups that's irrelevant. If you have an aging router struggling with a lot of connected devices, the Eve Energy (Thread-based) is the alternative — but for everyone else, the EP25 is the pick.

Buy it if: You want the best all-around option at a fair price.

2. Eve Energy — Best for Apple HomeKit

Eve Energy costs more than twice the Kasa ($40 vs $18). For Apple HomeKit users, it's worth every dollar.

It uses Thread rather than Wi-Fi — communicating through a mesh directly to a HomePod Mini or Apple TV 4K acting as a Thread border router. No cloud dependency, sub-second latency, and power monitoring that processes locally on-device rather than on a remote server. If privacy matters to you, this is the only plug in this list that never sends your usage data to a third-party cloud.

The physical form factor is also the smallest here. Matte white, nearly flush to the outlet plate. In a designed room, this is the plug that disappears.

One honest caveat: it delivers full value only in the Apple ecosystem. It does support Matter, so it'll technically work with Google Home and Alexa too — but Thread's speed and privacy benefits only activate with an Apple or Google Thread border router already in the home.

Buy it if: You're Apple HomeKit-first and want the cleanest, most private energy monitoring setup available.

3. Tapo P125M — Best Budget Pick

Twelve dollars. Matter-certified. Energy monitoring. That's the Tapo P125M in one sentence.

It's also the smallest plug in this list — barely larger than the outlet blade itself. Behind a TV stand or in a corner outlet, it nearly disappears. The Tapo app shows real-time wattage, historical usage graphs, and full schedule and automation support.

The tradeoffs are real. Cloud dependency is more pronounced than on the Kasa EP25, and the app is slightly less polished. But at $12, you can put one on every major appliance in the house for the cost of two Eve Energies. For first-time energy monitoring buyers who want coverage across multiple outlets without much upfront spend, start with Tapos.

Buy it if: You want energy monitoring across multiple outlets without spending much per plug.

4. Shelly Plug S Gen3 — Best for Home Assistant

The Shelly Plug S Gen3 is for buyers who've heard the phrase "Home Assistant" and felt something stir.

No Matter support natively, but it runs a full local API with MQTT, integrates directly into Home Assistant and similar platforms, and requires zero cloud at any point. The monitoring data is detailed — voltage, current, power factor, frequency — more than any other plug here by a significant margin. You can build dashboards that show not just wattage but power quality over time.

The form factor is compact and well-built for $15, with a European aesthetic that looks less like a gadget and more like quality electrical hardware.

If you're not running Home Assistant, skip it. If you are, it's the most capable energy monitoring plug at any price.

Buy it if: You use Home Assistant or want complete local control with no cloud dependency whatsoever.

5. Meross MSS115 — Best for Google Home

The Meross MSS115 is a reliable Matter-certified plug at $14 that tends to integrate cleanly with Google Home — more reliably, in practice, than some competing plugs in this price tier. Energy monitoring is accurate to ~0.5W, which is sufficient for household device tracking even if it's not as granular as the Kasa or Eve.

It's slightly bulkier than the Tapo P125M but still compact enough to leave the adjacent outlet clear. If your home runs on Google Home and you want a proven budget option without the TP-Link brand, this is the alternative.

Buy it if: You're Google Home-first and want a dependable Matter option at budget pricing.

Do Smart Plugs Actually Save Energy?

Not directly — the plug doesn't reduce power draw. What it does is reveal phantom loads and make you aware of them.

The math is real. A device drawing 10W in standby for 8 hours overnight costs about $35/year at average US electricity rates. Most households have 5-10 such devices, totaling $100-200/year in standby waste. Once you can see which devices are the worst offenders, scheduling them off takes five minutes in any smart home app.

The smart home starter kit build covers where energy monitoring fits in a first-time setup — it's typically a natural second or third step after smart lighting.

Can Smart Plugs Track Individual Device Usage?

Each plug monitors the one device plugged into it — that's the design. If you want per-socket monitoring across a power strip, look at the Kasa EP40M, which adds individual monitoring per socket.

For appliances with built-in smart features (newer washers, EV chargers), those devices often report their own usage data to their own apps. An energy monitoring plug adds redundancy in those cases, not new information.

The Right Pick by Setup

Start fresh: buy two or three Kasa EP25s and put them on the outlets you're most curious about — the home theater setup, the gaming rig, the home office monitor. The data will answer "what's actually driving my electric bill" faster than any estimate.

Apple HomeKit users wanting Thread: Eve Energy, no hesitation. The extra $22 buys local processing and privacy the Kasa can't match.

Home Assistant builders: Shelly Plug S Gen3. Nothing else comes close for local data depth.

Everything else: the Tapo P125M at $12. Start there, upgrade the interesting outlets later.