How a no-fee alarm system works
A DIY alarm consists of a central hub, door/window sensors, a siren and a mobile app. When a sensor is triggered, the hub activates the siren and sends a push notification to your phone. Everything works over your home WiFi โ no monitoring company, no monthly contract.
A monitored alarm (with CRA โ security company) costs โฌ20โ50/month but ensures a trained operator responds even if you're unavailable. A DIY alarm sends alerts only to your phone. For most homes, a DIY system is perfectly adequate.
System options by budget
Starter kit
โฌ80โ150
- Hub + 2 door sensors
- Internal siren
- App alerts
- Battery backup
- Easy self-installation
Full home kit
โฌ200โ350
- Hub + 4โ6 sensors
- External siren (110 dB)
- Motion detector
- Camera integration
- Optional professional monitoring
Smart home alarm
โฌ300โ600
- Full sensor coverage
- Smart lock integration
- Video doorbell
- Amazon Alexa / Google Home
- Remote arm/disarm
Recommended systems
Ajax StarterKit
Premium wireless alarm. Encrypted radio protocol (can't be jammed). Expandable. Optional professional monitoring. From โฌ200.
See price โReolink Alarm Kit
Good value kit with hub, sensors and siren. Integrates with Reolink cameras. App alerts, no monthly fee. From โฌ100.
See price โRing Alarm
Well-known brand, excellent app, easy installation. Professional monitoring optional (โฌ8/month). Works standalone for free. From โฌ150.
See price โSomfy Protect
French brand, premium build quality. Indoor and outdoor siren. Optional professional monitoring (โฌ5/month). From โฌ180.
See price โ