Updated November 2026
Data from the official Eufy and Netatmo sites.
2026 verdict
Two indoor companion sirens tied to two different hubs: the Netatmo Smart Indoor Siren gets the nod over the Eufy Security Siren on sensor coverage, sound level and its distinctive presence-simulation sounds.
The Eufy Security Siren counters with a lower price and a higher owner rating, and both devices run on primary batteries rated for about the same couple of years of use, so power longevity is a wash. Both are genuinely indoor devices with no weather resistance, and both only work as an add-on, the Eufy Security Siren tethered to a Eufy HomeBase and the Netatmo Smart Indoor Siren tethered over Bluetooth to a Netatmo Smart Indoor Camera, so neither functions as a standalone alarm. Buyers already inside the Eufy ecosystem get the cheaper, better-reviewed option in the Eufy Security Siren, while existing Netatmo camera owners benefit more from the Netatmo Smart Indoor Siren's louder alarm and tamper-deterring vibration sensor.
Connectivity
- Wi-Fi 2.4 GHz
vs
Winner
Connectivity
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| Feature | Eufy Security Siren | Netatmo Smart Indoor Siren | Winner |
|---|---|---|---|
| Rating | 4.3 | 3.3 | Eufy Security Siren |
| Sensors | None | Vibration | Netatmo Smart Indoor Siren |
| Sound Level | 105 dB | 110 dB | Netatmo Smart Indoor Siren |
| Presence Simulation | NO | YES | Netatmo Smart Indoor Siren |
| Battery Life | 2 years | 2 years | Tie |
| Solar Charging | NO | NO | Tie |
| Connectivity | 2.4 GHz WiFi | Bluetooth | Tie |
| Light Level | NO | NO | Tie |
- + Rating: 4.3
- - Sensors: None vs Vibration
- - Sound Level: 105 dB vs 110 dB
Winner
£56.81
- + Sensors: Vibration
- + Sound Level: 110 dB
- + Presence Simulation: YES
- - Rating: 3.3 vs 4.3
Frequently Asked Questions
Which is better overall: Eufy Security Siren or Netatmo Smart Indoor Siren?
The Netatmo Smart Indoor Siren has the edge overall, winning on sensor coverage, sound level and its presence-simulation sounds. The Eufy Security Siren answers with a lower price and a higher owner rating, making it the stronger choice for anyone already committed to the Eufy ecosystem.
What is the biggest difference between Eufy Security Siren and Netatmo Smart Indoor Siren?
What each one connects to. The Eufy Security Siren pairs with a Eufy HomeBase over a sub-1GHz link, while the Netatmo Smart Indoor Siren connects exclusively over Bluetooth to a Netatmo Smart Indoor Camera. Neither works as a standalone device, and neither integrates with Alexa, Google Home or Apple HomeKit.
Does either siren have tamper or vibration sensors?
The Netatmo Smart Indoor Siren includes a vibration sensor to detect deactivation attempts. The Eufy Security Siren has no vibration sensor and no tamper sensor either, relying purely on its alarm sound.
Which siren is louder?
The Netatmo Smart Indoor Siren, rated up to 110dB, is louder than the Eufy Security Siren's rated 105dB peak. The Netatmo unit also plays presence-simulation sounds like barking dogs, while the Eufy Security Siren offers just a single beep tone.
Who should buy the Eufy Security Siren?
Choose the Eufy Security Siren if you already run a Eufy HomeBase and want a cheap, better-rated companion alarm, and do not need vibration sensing or presence-simulation sounds.
Who should buy the Netatmo Smart Indoor Siren?
Choose the Netatmo Smart Indoor Siren if you already own a Netatmo Smart Indoor Camera and want a louder alarm with vibration sensing and distinctive presence-simulation sounds to deter intruders.
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Compare all 8 Sirens side by side
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- 8 Sirens
- 36 specs compared
- 33 filters
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