Prices verified May 28 · Always confirm at the retailer before buying.
The Amazon Smart Plug wins for Alexa simplicity, but the Kasa 4-Pack is the better value for most homes — $29.99 for 4 plugs with Google support and 2-year warranty.
The Verdict
Winner
Amazon Smart Plug
Amazon Smart Plug vs Kasa Smart Plug HS103P4 4-Pack, side by side
Pros:
- Seamless Alexa integration with simple setup
- Compact design leaves second outlet free
- Reliable reconnection after power outages
Cons (honest weight):
- Only works with Alexa, not Google Assistant
- Single plug only, higher per-unit cost
- No energy monitoring features
Pros:
- Cost-effective 4-pack at $7.50 per plug
- Dual voice assistant support (Alexa & Google)
- UL certified with 2-year warranty
Cons (honest weight):
- Larger footprint compared to mini plugs
- No energy monitoring
- Requires 2.4GHz Wi-Fi only
Where each one wins
8 dimensions scored head-to-head. Amazon Smart takes 2; Kasa Smart takes 4.
| Dimension | Amazon Smart Plug | Kasa Smart Plug HS103P4 4-Pack | Winner |
|---|---|---|---|
| Price per plugKasa offers 4 plugs for only $5 more than Amazon's single plug. | $24.99 (single) | $7.50 (4-pack) | Kasa Smart |
| Voice assistant compatibilityKasa supports both major assistants; Amazon locks you into Alexa. | Alexa only | Alexa & Google Assistant | Kasa Smart |
| Number of outletsKasa wins with 4 plugs in one box. | 1 plug | 4 plugs | Kasa Smart |
| Customer ratingAmazon edges ahead by 0.1 stars with 570K+ reviews. | 4.7 stars | 4.6 stars | Amazon Smart |
| WarrantyKasa offers a 2-year warranty; Amazon does not list one. | Not specified | 2-year limited | Kasa Smart |
| Setup simplicityBoth take under 2 minutes to set up via their respective apps. | Very easy (2 mins) | Very easy (2 mins) | Tie |
| CompactnessAmazon's compact design keeps the second outlet usable. | Compact, leaves second outlet free | Larger footprint | Amazon Smart |
| Energy monitoringNeither plug tracks energy usage. | No | No | Tie |
| Overall | 2 wins | 4 wins | Kasa Smart |
Price per Plug — Kasa saves you money
The Kasa 4-pack costs $29.99, or $7.50 per plug. The Amazon plug is $24.99 for just one. If you need more than one outlet automated, Kasa is the clear winner.
For most households, you'll want at least two smart plugs. Buying two Amazon plugs costs $49.98 — $20 more than the Kasa 4-pack. That difference can buy a smart bulb or two.
If you only need one plug and your main concern is reliability, the Amazon plug's price is reasonable. The setup is slightly simpler for Alexa fans.
Voice Assistant Compatibility — Kasa works with both
The Amazon Smart Plug only supports Alexa. If you use Google Assistant or switch platforms later, you're locked in.
The Kasa plug works with both Alexa and Google Assistant. It also works with IFTTT and Vera, giving you more flexibility. Most smart home hubs support Kasa out of the box.
For multi-assistant homes, Kasa is the obvious choice. Amazon's plug is best for Alexa-only households.
Number of Outlets — Kasa gives you four
The Kasa 4-pack includes four identical plugs. Each is controllable separately in the Kasa app. You can automate a lamp, a fan, a coffee maker, and a holiday light string at once.
Amazon sells only single plugs. To match Kasa's count, you'd spend $99.96 on four Amazon plugs. That's a $70 premium.
For budget-minded buyers, Kasa's per-plug cost is unbeatable.
Customer Rating — Amazon leads slightly
The Amazon Smart Plug has a 4.7 rating from over 570,000 reviews. Users consistently praise its drop-dead simple setup and reliable reconnection after power outages.
Kasa scores 4.6 from over 150,000 reviews. Users love the value and dual-assistant support, but some note the larger size and 2.4GHz Wi-Fi requirement as minor drawbacks.
Both are highly rated, but Amazon's sheer volume of positive feedback gives it an edge.
Warranty — Kasa offers peace of mind
Kasa includes a 2-year limited warranty. Amazon does not officially list a warranty period for its Smart Plug, though Amazon typically provides a 1-year warranty for many devices.
If warranty coverage matters to you, Kasa's 2-year term is a tangible benefit.
Setup — Both are nearly effortless
Amazon: Plug in, open Alexa app, follow the prompts. Most users report being done in 2 minutes. No hub required.
Kasa: Plug in, open Kasa app, follow the prompts. Also a 2-minute setup. Requires 2.4GHz Wi-Fi, which most routers support.
Both are equally simple, but Amazon's app integration is slightly smoother for Alexa-only users.
Compactness — Amazon wins for space saving
The Amazon Smart Plug is designed to leave the second outlet free. Its compact body does not block the adjacent plug.
Kasa's HS103P4 is larger, approximately 1.6 x 1.5 x 2.6 inches. It may block a second outlet in standard duplex receptacles.
If outlet space is tight, the Amazon plug is better.
Energy Monitoring — Neither does it
Both plugs lack energy monitoring. If you want to track power consumption, consider the Kasa KP115 ($15.99, single plug) which does offer this feature.
Which should you buy?
| Your situation | Pick | Why |
|---|---|---|
| You're all-in on Alexa and need one plug | Amazon Smart Plug | Amazon plug is the simplest, most reliable choice for Alexa users. |
| You use Google Assistant or want flexibility | Kasa Smart Plug HS103P4 4-Pack | Kasa supports both Alexa and Google, future-proofing your setup. |
| You need multiple plugs (3+ devices) | Kasa Smart Plug HS103P4 4-Pack | Kasa 4-pack costs less than two Amazon plugs. |
| Budget is your top concern | Kasa Smart Plug HS103P4 4-Pack | Kasa delivers 4 plugs for the price of 1.2 Amazon plugs. |
| You value a compact design | Amazon Smart Plug | Amazon's plug leaves the second outlet free. |
| You want a warranty for long-term use | Kasa Smart Plug HS103P4 4-Pack | Kasa offers a 2-year warranty; Amazon's is not listed. |
| You want energy monitoring | Amazon Smart Plug | Amazon plug is simple, but neither offers monitoring; consider Kasa KP115 instead. |
| You need outdoor-rated plugs | Kasa Smart Plug HS103P4 4-Pack | Kasa offers a 2-year warranty, but both are indoor-only; check the Kasa Outdoor Smart Plug EP40. |
Amazon plug is the simplest, most reliable choice for Alexa users.
Kasa supports both Alexa and Google, future-proofing your setup.
Kasa 4-pack costs less than two Amazon plugs.
Kasa delivers 4 plugs for the price of 1.2 Amazon plugs.
Amazon's plug leaves the second outlet free.
Kasa offers a 2-year warranty; Amazon's is not listed.
Amazon plug is simple, but neither offers monitoring; consider Kasa KP115 instead.
Kasa offers a 2-year warranty, but both are indoor-only; check the Kasa Outdoor Smart Plug EP40.
What if neither is right?
Kasa Smart Plug Mini EP10P4 4-Pack
$29.99
Smaller design than HS103P4, same great value and dual-assistant support.
Kasa Smart Plug KP115 with Energy Monitoring
$15.99
Single plug with real-time energy monitoring and smart scheduling.
Frequently Asked Questions
Amazon Smart Plug vs Kasa HS103P4 — which is better for most people?
The Kasa 4-pack is better for most people because it costs only $5 more and includes four plugs that work with both Alexa and Google Assistant. The Amazon plug is better only if you need one plug and are fully committed to Alexa.
Is the Amazon Smart Plug worth the higher per-plug price?
Yes, if you value seamless Alexa integration and a compact design that doesn't block the second outlet. But for most households, the Kasa 4-pack offers better value at $7.50 per plug.
Do either of these smart plugs work with Google Assistant?
Only the Kasa plug works with Google Assistant. The Amazon Smart Plug exclusively supports Alexa. If you use Google Assistant, go with Kasa.
Do I need a smart home hub to use these plugs?
No. Both plugs connect directly to your Wi-Fi network (2.4GHz) and require no additional hub. Setup takes about 2 minutes with their respective apps.
Can I use these plugs with outdoor lights or appliances?
No. Both plugs are rated for indoor use only. 49), which is weather-resistant and offers IP64 protection.
Which plug has better customer ratings?
The Amazon Smart Plug has a slightly higher rating (4.7 stars from 570,000+ reviews) compared to Kasa (4.6 from 150,000+). Both are highly reliable, but Amazon's volume of feedback indicates consistent satisfaction.
How we compared. We analyzed 720,000+ verified Amazon reviews across both products, cross-referenced manufacturer specs, and evaluated real-world user feedback. Prices update weekly from Amazon.
Who wrote this and where's the data from?
Mubboo Editorial Team — independent US-market consumer research. Picks based on verified buyer reviews and manufacturer data. Prices update weekly from Amazon.