Boundary vs Simplisafe

boundary vs Simplisafe2

Simplisafe launched in the UK last year, making their self-install burglar alarm available through their website. In this article we look at the key differences between the Boundary smart alarm and Simplisafe’s.

Alarm Systems

We compared the Boundary Small House Bundle with the equivalent Simplisafe alarm system. Here’s a table to illustrate the components in each bundle:

Boundary Price per unit Simplisafe Price per unit
Central Hub 1 £219 1 Varies
Contact Sensors 2 £30 2 £14.99
Movement Sensors 4 £30 4 £29.99
External Siren 1 £90 1 £59.99
Key Fobs 2 £20 for 2 1 £24.99

*Simplisafe Base Stations cannot be bought separately. It must be bought as part of a bundle.

PIR Motion Sensors

Motion sensors are the watchmen of your home. From the corners of rooms, they scan for burglars by detecting changes in infrared heat.

Both Boundary and Simplisafe offer motion sensors which are pet-friendly, but with different specifications:

Boundary Motion Sensor Simplisafe Motion Sensor
Ignores pets up to 35kg  23kg
How to make sensors pet-friendly With the Boundary phone app Adjust physical switch on sensor and turn upside-down
Recommended installation height 2.25m 1.2m – 1.5m
Max detection range 20m 9.1m

Outdoor SirenBoundary Alarm Outdoor Siren

The Boundary external siren is fully IP45 rated and will withstand harsh weather including heavy rain or snow. The Simplisafe external siren is “not weatherproof”, and needs to be mounted under an eve or overhang to stop rain or snow hitting it.

Installation options

With the Boundary alarm you can choose between self-installation and pro installation (for an additional fee). With our Complete plan you also get a free annual maintenance, done by a Boundary engineer.

Currently Simplisafe only offers self-installation.

Costs of ownership

On average, homeowners keep their alarm system for seven years or more. Here we compare the Total cost of ownership* (TCO) over time, including upfront purchase costs and ongoing monthly subscriptions.

In the table below, ‘Monitored’ refers to 24/7 monitoring by an alarm receiving centre (ARC) and police response if a burglar is confirmed,

Boundary Simplisafe
Initial Hardware Cost £509 £494
Non-Monitored Monthly Fee £8 £12.99
Monitored Monthly Fee** £25 £19.99
TCO (1 year) £605 £650
TCO (2 years) £701 £806
TCO (3 years) £797 £962
TCO (7 years) £1,181 £1,585
TCO Monitored (1 year) £1,008 £738
TCO Monitored (2 years) £1,308 £974
TCO Monitored (3 years) £1,608 £1,214
TCO Monitored (7 years) £2,808 £2,173
Cost for 2 extra movement sensors £60 £60

*Total cost of ownership: an estimate of all the direct and indirect costs involved in buying and using a product over its lifetime.

**Does not include unpredictable expenses, like Simplisafe’s Guard call-out fee.

24/7 Monitoring and Police Response

Boundary Simplisafe
Who monitors the alarm? An alarm receiving centre (ARC) An alarm receiving centre
When are the police requested? Two activated sensors e.g. front-door contact sensor and hallway motion sensor. On visual verification of the burglar with Simplisafe camera.
How are they requested? The ARC will have a direct line to the police. By calling 999. The ARC will go through an operator.
ARC response if alarm is triggered but burglary is not confirmed? The ARC will contact the homeowner and any nominated keyholder. Guard dispatched. With the Simplisafe Pro Premium plan this costs £75 for the first 15 minutes at the address.

Alarm Standards and Certification

Boundary Simplisafe
Product Grading 2* None
NSI/SSAIB Approved Company? Yes – SSAIB** No
NSI/SSAIB Approved Installation? Yes – SSAIB No
NSI/SSAIB Approved Monitoring? Yes – NSI Gold No
Approved for Level 1 Police Response? Yes No

* Product grading currently in progress and will be complete shortly after launch
** SSAIB certification only applies to our professionally installed product and does not extend to DIY installs

For your alarm system to be professionally monitored and registered with your local police force it must:

  • Be a system that has a minimum grade 2 rating
  • Have the system installed by an NSI or SSAIB certified company
  • Be monitored by an Alarm Receiving Centre that is also certified by the NSI or SSAIB
  • The supplying company be registered with the local Police force on their Compliant Systems list
  • Have a URN (Unique Reference Number) issued by the local Police force after installation

This criteria must be met for a Level 1 police response in the event of a break-in.


The Boundary system is packed with features and the table below shows a direct comparison with Simplisafe:

Boundary Simplisafe
Remote ‘over the air’ updates Manual process
Mobile App
Mobile App Quality Excellent Poor
Cellular Backup Optional Upgrade
Mains Failure Battery Backup
Neighbourhood Watch App In development
Smart Home Integration
IFTTT Support
Occupied Home Simulation
Geofencing Alarm Reminders
Automated Keyholder Calling
Contract Length 30 Days 30 Days
Optional Annual Maintenance

Why choose Boundary?

Boundary is an alarm system that prioritises reliability and ease-of-use, with our phone app. The Boundary alarm has been designed and built from the ground up by UK security experts and software designers. We combine decades of alarm system knowledge with modern IoT technology.

Information in this Comparison

All of the data has been gathered between December 2019 to January 2020. We have tried to make sure the systems are similar to Boundary but this isn’t always possible. All features and other comparisons are taken from publically available information displayed on the company website.

Our other comparisons:
Read Boundary vs Verisure