Ring Alarm is the most popular DIY home security system in the UK by some margin. Ajax is what professional installers actually fit. They sit at opposite ends of the wireless alarm market, one designed for self-install on a budget, the other engineered for professional deployment.
If you’re trying to decide between them, here’s the honest comparison.
The headline difference
Ring is a smart home product that happens to include an alarm. Ajax is a security system that happens to have a great app. That distinction explains nearly every difference between them.
Hardware quality
Ring sensors are plastic, well-built for their price, and run on standard batteries that you’ll change every 1–3 years. Ajax sensors are larger, more premium, and the batteries last up to 7 years. Ajax is also Grade 2 certified to European standards (EN 50131), which Ring is not.
If you’ve ever had to deal with a wireless sensor that keeps disconnecting from your hub, you’ll appreciate Ajax’s Jeweller protocol, it’s encrypted, has anti-jamming, and reaches up to 2km in open space.
Installation
Ring is genuinely easy to self-install. You can have a basic setup running in under an hour with no tools beyond what came in the box. Great for renters and small flats.
Ajax is sold through installers. You can buy it online, but the sensible route is a professional install, the difference between “sensors stuck on with adhesive in random spots” and “a tidy system that covers your house properly” is the entire value of fitting it well.
Cost
A Ring Alarm 8-piece pack costs around £250–£300. Add Ring Protect Pro at roughly £10–£12 a month if you want professional monitoring and cellular backup.
A professionally-installed Ajax system starts from around £900 and scales up. There’s no subscription required, the app and notifications are free.
Over five years: Ring with Pro monitoring is roughly £900. Ajax with no monitoring is the upfront cost only. The break-even point depends on how much monitoring you actually want.
Insurance
Some insurers require a Grade 2 certified alarm for discounts or coverage. Ajax meets this standard. Ring does not. If your insurer cares about certification, that alone settles the question.
The app and day-to-day use
Both apps are good. Ring’s is more polished as a consumer product and integrates with the wider Ring ecosystem (doorbells, cameras). Ajax’s app is more powerful for users who want fine-grained control over zones, schedules and user permissions.
Who Ring is right for
- Renters who can’t fit drilled equipment
- Small flats where the bar for “good enough” is low
- People already invested in the Ring ecosystem
- Budget-conscious buyers who want a basic deterrent
Who Ajax is right for
- Homeowners who want a serious, long-term security system
- Anyone whose insurance requires Grade 2 certification
- Properties large enough that wireless range and reliability matter
- People who don’t want to mess with sensor batteries every other year
Our verdict
Ring is a great gateway product. Ajax is a destination product. If you’re buying for a house you plan to stay in, fit Ajax once and don’t think about it for a decade.