Smart plugs are the easiest entry point into home automation. For $15–$40 each, you can control any appliance, monitor energy usage, and build automations that save real money on your electricity bill.
May 11, 2026 | 11 min readBest Overall: TP-Link Kasa KP125M — Matter support, energy monitoring, and under $20. Best Premium: Eve Energy Strip — Thread/Matter, 3 outlets + 2 USB, individual monitoring. Best Budget: TP-Link Kasa HS103 — Reliable Wi-Fi plug under $12.
Smart plugs occupy a unique position in the smart home ecosystem: they're cheap, universally useful, and surprisingly powerful. In 2026, the latest generation adds Matter support, improved energy monitoring, and Thread networking for instant response times.
Here's what makes them essential:
| Product | Protocol | Energy Monitor | Max Load | Price |
|---|---|---|---|---|
| TP-Link Kasa KP125M | Matter over Wi-Fi | Yes | 15A / 1800W | $18 |
| Eve Energy Strip | Thread / Matter | Yes (per outlet) | 15A total | $100 |
| TP-Link Kasa HS103 | Wi-Fi | No | 15A / 1800W | $12 |
| Wemo WiFi Smart Plug | Wi-Fi | Yes | 15A / 1800W | $25 |
| Eve Energy (single) | Thread / Matter | Yes | 13A / 3000W | $40 |
| Amazon Smart Plug | Wi-Fi (Alexa only) | No | 15A / 1800W | $15 |
The KP125M is the sweet spot of price, features, and compatibility. It's one of the first affordable smart plugs with native Matter support, meaning it works with SmartThings, Alexa, Google Home, and Apple HomeKit without needing separate integrations for each.
If you want the most detailed energy monitoring and the fastest response times, the Eve Energy Strip delivers. It uses Thread (with Matter) for sub-50ms response times — you press a button and the plugged-in device responds instantly, with zero cloud dependency.
The strip offers 3 individually controllable outlets plus 2 USB-A ports, each outlet reporting its own energy consumption. The Eve app provides beautiful energy visualizations, and data flows into HomeKit and Home Assistant with full granularity.
At under $12, the HS103 is the smart plug I recommend to everyone starting their smart home journey. It doesn't have energy monitoring or Matter support, but it's dead simple: plug it in, connect to Wi-Fi, and you're controlling a lamp or fan from your phone in 2 minutes.
I've had a dozen HS103s running continuously for over 3 years without a single failure. They just work — and that reliability at this price point is unbeatable.
Here's how to get the most from smart plugs with SmartThings:
Auto-off after 2 hours or when room hits 72°F via temperature sensor. Saves $15-30/month on heating.
Kill power to entertainment centers and chargers at midnight. Eliminates standby power drain (5-10% of your bill).
Plug turns on 5 minutes before your alarm. Dumb coffee maker becomes "smart" for $12.
Sunset to 11pm schedule for outdoor decorations. No more forgetting to turn them off.
Auto-off after 30 minutes. Check from your phone if you left the iron on. Peace of mind for $12.
Turn on lamp, fan, and phone charger when Ring doorbell detects arrival.
After monitoring energy usage across dozens of devices with smart plugs for 6 months, here are the surprises:
| Device | Standby Power | Monthly Cost (Standby) |
|---|---|---|
| Cable box / DVR | 25W continuous | $2.60 |
| Gaming console (idle) | 15-45W | $1.56–$4.68 |
| Desktop computer (sleep) | 3-5W | $0.31–$0.52 |
| Old refrigerator | 120-200W (cycling) | $12.48–$20.80 |
| Phone charger (plugged, no phone) | 0.1-0.5W | $0.01–$0.05 |
Based on $0.12/kWh average. A smart plug on your entertainment center that cuts vampire power from 10pm to 6am can save $50-100 per year — paying for itself in 2 months.
Smart plugs remain the best bang-for-buck smart home device in 2026. Start with 4-6 TP-Link Kasa KP125M plugs ($18 each) for your most-used lamps and biggest energy vampires. Add energy monitoring to understand your real consumption, then build automations that save money automatically. For premium setups, the Eve Energy Strip's Thread/Matter performance and per-outlet monitoring justify the $100 price tag.
Matter smart plug with energy monitoring. Best overall pick.
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