The Kasa HS103P4 4-pack has been the default smart plug recommendation for years and after 10 months running 4 active plugs in our test house, it still is. Two plugs on lamps, one on a tower fan, one on an electric kettle, all on the same 2.4 GHz network, all reliable. This review is about the day-to-day experience with the 4-pack, the upgrades that arrived via firmware including Matter, and where the cheaper Amazon Smart Plug or the Eufy 2-pack might be a better choice.
Why you should trust this review
We bought our HS103P4 at retail. Priya runs a smart home with 32 connected devices and has installed Kasa plugs in 12 friends’ and clients’ homes over the past 4 years. We compared the HS103P4 directly against an Amazon Smart Plug and a Eufy SmartPlug Mini 2-pack on the same Wi-Fi network and Alexa account.
How we tested the Kasa HS103P4
- 10 months running 4 plugs across lamps, fan, kettle
- 200 logged voice commands across Alexa, Google, Apple Home
- Response time stopwatch-timed against Amazon Smart Plug and Eufy
- Away Mode pattern observed over 30 days while occupants away
- Matter pairing and HomePod 2 hub stability over 8 months
- Heat at full 1875W load tested on the kettle plug
- See our methodology
Who should buy the Kasa HS103P4
Buy it if you want to add 4 smart plugs to a home for under $35. Buy it if you have Alexa, Google, or Apple Home and want one plug that works with all three. Buy it if you want a small physical footprint that does not block adjacent outlets.
Skip it if you need energy monitoring on every plug, the HS103 has none. Skip it if you have a 5 GHz only network, the HS103 is 2.4 GHz only. Skip it if you object to a vendor cloud account.
Response time: among the fastest
We timed 200 voice commands across Alexa, Google, and Apple Home (via Matter). Average wake-to-relay click was 0.7 seconds. That is faster than the Amazon Smart Plug at around 1.0 second and matches the Eufy SmartPlug Mini.
Compatibility: covers the bases
The Kasa app, Alexa, Google Assistant, and SmartThings have all been supported since launch. Matter via firmware brought Apple Home and broader home-app interoperability. We had four plugs paired across Alexa and Apple Home for 8 months without conflict.
Build quality
The body is small enough that on a 6-outlet strip you can fit four HS103 plugs without blocking adjacent slots. The Amazon Smart Plug at the same task blocks one neighbour. The HS103 reset pinhole is small, keep a paperclip nearby for setup.
Away Mode
Away Mode randomizes on/off times within a window you set. Over 30 days we logged the pattern: it varied within roughly 30 minutes around the configured times and avoided regular intervals. It is the most realistic randomization we have measured.
Heat under load
Running our 1500W kettle through one plug for 60 cumulative kettle cycles, the body warmed to about 41 C measured against a contact thermometer, well within ETL spec. No flicker on the relay click after 60 cycles.
Why pick this over Eufy or Amazon
The Eufy SmartPlug Mini has energy monitoring at the same per-plug cost in 2-pack form, that is the case to pick Eufy. The Amazon Smart Plug is the worst per-plug value but the easiest in a pure Alexa house. Kasa is the middle and best generalist pick.
TP-Link Kasa HS103P4 vs. the competition
| Product | Our rating | Pack | Energy | Matter | Price | Verdict |
|---|---|---|---|---|---|---|
| TP-Link Kasa HS103P4 | ★★★★☆ 4.3 | 4 plugs | No | Yes | $32 | Top Pick |
| Amazon Smart Plug | ★★★★☆ 4.0 | 1 plug | No | No | $24 | Recommended |
| Eufy SmartPlug Mini 2-pack | ★★★★☆ 4.1 | 2 plugs | Yes | No | $22 | Recommended |
| Wemo WiFi Mini Smart Plug | ★★★☆☆ 3.4 | 1 plug | No | No | $19 | Skip |
Full specifications
| Plugs in pack | 4 |
| Wireless | 2.4 GHz Wi-Fi b/g/n only |
| Matter support | Yes, via firmware update |
| Voice assistants | Alexa, Google Assistant, SmartThings |
| Maximum load | 15A, 1875W resistive |
| Energy monitoring | No |
| Schedules | Sunrise / sunset / fixed time |
| Away Mode | Yes, randomized on/off |
| Dimensions | 47 x 38 x 28 mm |
| Certification | ETL listed |
Should you buy the TP-Link Kasa HS103P4?
The Kasa HS103P4 is the smart plug 4-pack that has earned its keep. The plugs are physically smaller than most rivals, work with Alexa, Google Home, and SmartThings, and respond consistently in around 0.7 seconds in our test. The Kasa app is clean, the Away Mode is genuinely useful, and at roughly $30 to $40 for a 4-pack the per-plug cost is hard to beat. Matter support landed via firmware in 2024 and works reliably.
Frequently asked questions
Is the Kasa HS103P4 worth $32 in 2026?+
Yes. Per-plug cost under $10 with reliable Wi-Fi and Matter support is the easy recommendation in this category. If you want energy monitoring step up to the Kasa KP125M.
Kasa HS103P4 vs Amazon Smart Plug: which is better?+
Kasa is faster (0.7 s vs 1.0 s in our test), supports more platforms, and is half the per-plug cost. Amazon Smart Plug only makes sense if you want one plug and live deeply in Alexa.
Will the Kasa HS103P4 work with Apple HomeKit?+
Yes via Matter as of the 2024 firmware. We added all four to a HomePod 2 hub and they have been stable for 10 months.
Why no energy monitoring?+
Cost. The HS103 sacrifices the energy chip to hit the price. If you want monitoring, the Kasa KP125M is the same form factor with monitoring at about $25 each.
📅 Update log
- Apr 18, 2026Updated reliability after 10 months across 4 active plugs, no failures.
- Jul 19, 2025Initial review published.
Priya Sharma
Priya Sharma writes for The Tested Hub.