The best alarm systems, compared.
Top pick: X-Sense AS05 – Highest score, 90, at about £59.49, with 4.5 from 137 reviews and a counted indoor kit. Best value: Yale HSA Essentials – About £81.88 includes an external siren, six AAA cells and 4.4 from 997 reviews, with no monitoring fee on the bullets. Updated 20.10.2026.
An alarm system is a complete wireless kit: a hub or panel, sensors, a siren or a sounder in the base, and a keypad, remote or app. You are buying a self-fitted system on amazon.co.uk that you answer yourself. It is not a police unique reference number, and a typical listing does not state an EN 50131 grade. Judge a kit by how many contacts it has against your doors, whether an outside siren is in the box, what still works after a power or broadband cut, and what the fee actually buys. The order of response path, sensor count and fee is in the [alarm systems buying guide](/hub/burglar-protection/alarm-systems/sub/alarm-systems-buying-guide). A siren plus a phone push is self-monitoring.
An alarm system is a complete wireless kit: a hub or panel, sensors, a siren or a sounder in the base, and a keypad, remote or app. You are buying a self-fitted system on amazon.co.uk that you answer yourself.
42 products checked · 64 hrs invested · +18,600 readers
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Personal buying guide
Question 1 of 2
What has to be in the first carton?
The X-Sense AS05 is a corded kit priced at £59.49, with two door sensors, one motion sensor, a keypad and a base the bullets rate at 100 dB. Across 137 amazon.co.uk reviews it sits at 4.5, the highest star line in this set. Reviewers describe a fit measured in minutes for a flat, a garage or a workshop, using Home, Away and Disarm from the keypad and the app. The title names Alexa, and the bullets do not state a monitoring fee or a maximum number of extra sensors. There is no outdoor siren in the kit, and reviewers say the base is the only sounder, so someone outside may not hear it. There is no battery backup on the base: a power cut also drops Wi-Fi, and a power bank does not bring the alerts back. It is the top pick here for a small place you can hear from indoors, and the wrong kit if the siren has to sit on an outside wall.
Pros
Cons
Best for: You want a small corded kit for a flat, garage or workshop, and an indoor sounder is enough.
Less suitable: You need an outside siren, or alerts that survive a power cut.
Specifications
Common questions
Can you use it in a flat?
The bullets say it suits bedrooms, apartments and rental properties. It includes two door sensors, one motion sensor and a keypad.
Is the keypad wireless?
The listing describes a wireless kit and a keypad used with the app. A separate keypad cable is not listed.
Does it include an outdoor siren?
The bullets quote a 100 dB alarm from the base station. Reviewers say there is no external siren in the kit.
The Yale HSA Essentials kit is a battery five-piece alarm priced at £81.88, with two PIR sensors, one door contact, a keypad and an external siren the listing rates at 104 dB. Across 997 amazon.co.uk reviews it sits at 4.4. The bullets say there are no monitoring fees and no contracts, and that you can add up to 20 HSA accessories, with a stated range of 30 m. Six AAA cells are included, and reviewers praise the battery fit and the tamper-proof siren box. The keypad flip-cover hinge failed within minutes for one buyer, and other reviewers say the siren is quieter than they expected. Changing those siren batteries means a ladder. It is the best value in this set when you want an outside box without a contract on the listing, and a weaker match if you need a phone path that stays up when the broadband drops, because no GSM or 4G path is stated.
Pros
Cons
Best for: You want an outside siren and a battery Yale without a monitoring fee on the listing.
Less suitable: You need more than one contact on day one, or a SIM path when the broadband fails.
Specifications
Common questions
Is the alarm loud?
The listing states 104 decibels. Some reviewers still describe it as quieter than other sirens they have used.
Does it include a keypad?
Yes. The included-components line lists a keypad, a siren, two PIRs and one door contact.
Are there monitoring fees?
The bullets say there are no monitoring fees and no contracts. That is a listing claim, not a police-response service.
The X-Sense AS08 is a corded kit priced at £84.99, with four door sensors, two motion sensors, a keypad and a base the bullets rate at 100 dB. Across 154 amazon.co.uk reviews it sits at 4.4. Buyers describe about 30 minutes to fit, and they use both the app and the keypad, including a panic button on the keypad. One buyer linked a workshop at the bottom of a garden, and another mentions extra X-Sense smoke or leak devices; the title names Alexa. Reviewers say there is no outside siren, so neighbours may not hear an indoor sounder, and some wanted the alarm louder. A reviewer mentions an optional paid notification tier, which the bullets do not price, and the listing does not state how many extra sensors you can add. It suits a house that needs four doors covered without an outside box, and it is the wrong spend if the siren has to be visible from the street.
Pros
Cons
Best for: You need four door contacts and two PIRs indoors, and you do not want an outside box.
Less suitable: You need a street-facing siren, or a fee-free outdoor sounder in the first carton.
Specifications
Common questions
Does it include a panic button?
The bullets say you can press a panic button on the keypad.
Can you add sensors?
The listing does not state a maximum. It already includes four door sensors and two motion sensors.
Is there an outdoor siren?
Reviewers say no outside alarm connects with this kit. The stated sound is 100 dB from the base station.
The Yale IA-320 Sync is a mains six-piece kit priced at £199.04, with one door or window contact, two PIR sensors, a keypad and an external siren. Across 1,766 amazon.co.uk reviews it sits at 4.3. Buyers describe a wire-free fit with the fittings in the box, and they use it as a local bell and as a phone alert. The listing says you can arm it from an iOS or Android app, names Alexa, Google Assistant and Philips Hue, and claims up to 40 devices with a stated range of 200 m. The page does not state a GSM or 4G path, so a broadband drop takes the app with it even if the bell still sounds. Reviewers call the app clunky and short of features, and early buyers mention beeps while the system was new. The starter carton still has only one contact, so a house with a back door needs an extra sensor before the kit matches the building.
Pros
Cons
Best for: You want a mains Yale with an outside siren and Philips Hue, and you will add contacts for the other doors.
Less suitable: You want a battery kit at a lower price, or a phone alert that does not depend on broadband.
Specifications
Common questions
Can you control it from a phone?
The listing says you arm, disarm and manage it from an iOS or Android app, and the title names Alexa and Google Assistant.
Does the kit include a motion detector?
Yes. The included-components line lists two PIR motion sensors and one door or window sensor.
Can you add sensors?
The bullets say the kit can connect up to 40 devices.
The XUK A107F is a 21-piece touchscreen kit priced at £139.99, with eight contacts, four PIRs, a siren the bullets rate at 120 dB, three remotes, three RFID tags and an SOS button. Amazon shows 4.2 from 19 reviews, and many of those reviews are in French, so the UK file is thin. The bullets claim Wi-Fi and 4G, a 500 m range, Alexa and Google Assistant, and up to 200 sensors, with no alarm-company subscription. A 4G path still needs a SIM and a mobile plan. One UK review says the wired sounder has to sit close to the panel because the cable is short. That buyer disabled the panel after constant errors and no reply from support. It is the carton to consider when you want many contacts and a 4G claim together, and a gamble if you want a large UK review file before you fit it.
Pros
Cons
Best for: You want a large counted sensor set and a 4G claim, and you accept a thin UK review file.
Less suitable: You want a well-reviewed UK brand, or a sounder you can mount far from the panel.
Specifications
Common questions
Does it work without a SIM?
The bullets describe Wi-Fi plus 4G. A 4G path needs a SIM and a mobile plan even where the brand says there is no alarm-company subscription.
How loud is the siren?
The bullets say 120 dB. One UK review says the wired sounder has to sit close to the panel because the cable is short.
The LWOHSI A108S is a corded panel priced at £39.99, rated 3.9 from 736 amazon.co.uk reviews. The bullets claim a 120 dB siren, a Wi-Fi mode with no monthly fee, a separate SIM mode, Alexa and Google, and the option to add door sensors, infrared sensors and SOS buttons. The included-components line says one A108S alarm system only, so the contact and PIR counts are not itemised. Some buyers say it worked from the box with devices already linked, and that extra fobs were easy. Others report a sensor that would not connect, fobs that stopped after two months, a seller who wanted a long setup video before a return, and support that did not answer. It is the lowest shelf price in the set. It is a poor bet if you need a counted sensor list before you stick or screw anything to the frame.
Pros
Cons
Best for: You want the lowest shelf price and you have checked what is actually in the carton.
Less suitable: You need a stated contact count, or a seller who answers when a sensor fails.
Specifications
Common questions
Can you use it without a landline?
The bullets describe a Wi-Fi mode with no SIM and a second mode with a SIM. A landline is not listed as required.
Does it have a motion sensor?
The sensor line says PIR and the bullets mention motion sensors. The included-components line does not count them.
Can you add sensors?
The bullets say you can add door sensors, infrared sensors and SOS buttons. No maximum is stated in the spec block.
The Swokely panel is listed at £55.99 as a Wi-Fi and GSM auto-dial alarm, rated 3.9 from 62 amazon.co.uk reviews. The specification line states 110 dB, and the bullets claim Alexa, a Tuya app and up to 100 zones. The included-components line names a remote control only, while the unit count is 18, so you cannot tell how many contacts or PIRs are in the carton. One buyer could not make it work at all. Others say voice activation did not work, the installer code was hard to find, and the wall battery drained quickly. A review says Wi-Fi SMS or calls need a subscription, and the GSM path was described as needing a 2G or 3G SIM the buyer could not buy. False alarms are in the same file. Buy it only after the seller confirms the sensor count, and leave it if you need a counted kit you can compare with Yale or X-Sense.
Pros
Cons
Best for: You have confirmed the sensor list with the seller and only need a low-priced visible alarm.
Less suitable: You need a counted set of contacts and PIRs, or voice control that matches the listing.
Specifications
Common questions
Does it work with a voice assistant?
The bullets claim Alexa voice control. A UK review said voice activation did not work and the setup code was hard to find.
What siren level is stated?
The specification line says 110 decibels.
What is in the box?
The included-components line says remote control only, while the unit count is 18. Treat the sensor list as unclear.
The Ring Alarm Pack L with outdoor siren is an 11-piece kit priced at £269.99, with four contacts, three motion detectors, a keypad, a range extender and an outdoor siren. The listing says it is for two- or three-bedroom homes. Reviewers describe about 30 minutes to install with adhesive pads, and an outdoor siren that runs on batteries. This ASIN does not show an amazon.co.uk star rating or review count. The battery siren has fewer functions until it is wired to mains. One buyer had a noisy keypad within a fortnight that support then cleared. App or Alexa arming, Alarm Calls and cellular backup sit on a separate Ring subscription. It is the Ring pack to look at when the outside box has to be in the first carton, and a high price if the indoor base siren would have been enough.
Pros
Cons
Best for: You want a Ring pack for a two- or three-bedroom home with the outdoor siren already in the box.
Less suitable: You will not pay a Ring plan, or you do not need an outside box on day one.
Specifications
Common questions
Does it include an outdoor siren?
Yes. The 11-piece bundle adds an outdoor siren to four contacts, three motion detectors, a keypad and a range extender.
Is professional installation required?
The listing says you follow the Ring app. Reviewers describe adhesive pads and a DIY fit. A rented or shared wall still needs the landlord's permission.
Who is it for?
The listing says two- or three-bedroom homes.
The Ring Alarm Pack XL is a 13-piece kit priced at £309.99, with six contacts, three motion detectors, a keypad, a range extender and an outdoor siren. The listing says it is for homes with three bedrooms or more. This ASIN does not show an amazon.co.uk star rating or review count. Review notes praise the guided app setup, different door chimes, and using the alarm in the same app as other Ring devices. One buyer found the motion pattern narrower than PIRs they already knew, so they used two detectors in one room, and voice disarm rarely worked for them. App or Alexa arming, Alarm Calls and cellular backup are a Ring subscription sold separately, and this listing is not a police unique reference number. At this price it is the largest Ring carton in the set, and it is a heavy spend if you will not pay for the plan.
Pros
Cons
Best for: You already use Ring and want the largest sensor count plus an outdoor siren in one carton.
Less suitable: You want a no-fee app, a published UK star line, or a smaller home.
Specifications
Common questions
Does it include a keypad?
Yes. The 13-piece pack lists a base station, keypad, six contacts, three motion detectors, a range extender and an outdoor siren.
Is professional monitoring included?
No. Alarm Calls and cellular backup are described as a Ring subscription sold separately. This listing is not a police URN.
Who is the pack size for?
The listing says homes with three bedrooms or more.
The Ring Alarm Pack M is a seven-piece kit priced at £159.99, with two contacts, two motion detectors, a keypad and a range extender. The base station is the siren. Review notes mention a straightforward setup beside a Ring doorbell, a backlit keypad, and a base-station siren heard outside the house. Buyers repeat a 24-hour battery backup. This ASIN does not show an amazon.co.uk star rating or review count. Door contacts need risers when the gap is large, and those risers were hard to find. The listing says a subscription is required for app or Alexa arming, and Alarm Calls are not the same as a police unique reference number from a former alarm company. It fits a two-bedroom home that already uses Ring, and it is short if you need an outdoor siren in the first box.
Pros
Cons
Best for: You have a two-bedroom home, already use Ring, and can live with the base station as the siren.
Less suitable: You need an outdoor siren now, or several more doors than two contacts will cover.
Specifications
Common questions
Can you control it from a phone?
The listing says you use the Ring app, and that a Ring subscription is required for app or Alexa arming. Check the current plan page as well, because Ring's own FAQ wording has differed.
Does it include a keypad?
Yes. The seven-piece pack lists a base station, keypad, two contacts, two motion detectors and a range extender.
Is professional monitoring included?
No. Alarm Calls and cellular backup are a separate subscription. The pack does not include a police unique reference number.
The Ring Alarm Pack L is a 10-piece kit priced at £209.99, with four contacts, three motion detectors, a keypad and a range extender, and no outdoor siren. The bullets say you can add a siren later. Buyers mention the app walking them through setup, and some cite battery backup in a power cut. This ASIN does not show an amazon.co.uk star rating or review count. The price rises as you add sensors. One reviewer found camera clips less available when power or internet failed. Alarm Calls and cellular backup are a separate subscription, and remote features depend on the path you have paid for. It suits a two- or three-bedroom home that will self-monitor from the base station, and it is the wrong carton if the siren has to be on the outside wall on day one.
Pros
Cons
Best for: You want Ring coverage for a two- or three-bedroom home and can add an outdoor siren later.
Less suitable: You need the outside box in the first delivery, or a kit with a published star line.
Specifications
Common questions
Does this pack include an outdoor siren?
No. The ten pieces are a base station, keypad, four contacts, three motion detectors and a range extender.
Is professional monitoring included?
No. The listing points to a separate Ring subscription for Alarm Calls and cellular backup.
Can you add a siren later?
The bullets say you can add an outdoor siren. It is not in this carton.
The Ring Alarm Pack S is a five-piece kit priced at £139.99, with one contact, one motion detector, a keypad and a range extender. The base station is the siren, and there is no outdoor sounder in the box. Review notes describe a short fit through the Ring app, and people who already own a Ring doorbell use one app for both. This ASIN does not show an amazon.co.uk star rating or review count. One contact is not whole-home coverage, and remote features depend on Wi-Fi. Sensor batteries come up as a later job. The listing says a subscription is required for app or Alexa arming, and assisted monitoring is thinner than some buyers expected from other countries. It fits a flat as a first Ring kit beside a doorbell, and it leaves a house short of contacts.
Pros
Cons
Best for: You live in a flat, already use a Ring doorbell, and only need one door covered at first.
Less suitable: You need several doors, an outside siren, or arming from the phone without a plan.
Specifications
Common questions
Does the pack include an outdoor siren?
No. The five pieces are a base station, keypad, one contact, one motion detector and a range extender. The base station is the sounder.
Will it work with other Ring devices?
The listing says you use the Ring app. Reviewers who already own a Ring doorbell describe one app for both.
Is monitoring included?
Assisted monitoring and cellular backup are optional and sold separately. The listing also says a subscription is required for app or Alexa arming.
Twelve amazon.co.uk listings were scored from the prices, star lines and review notes captured on 19 October 2026. There is no lab test, no siren measurement and no police-response trial. A stated decibel figure, a stated radio range and a review comment are three different claims. The three weights below sum to 100. Five Ring ASINs have no star line, so they cannot outscore a kit with a counted UK review file on evidence alone.
Evidence
35%Star rating, then the size of the UK review file. A 4.5 from 137 reviews does not out-prove a 4.4 from 997 on its own, and a 4.2 from 19 reviews, many of them not in English, is a thin file.
Fit for the stated job
40%Contacts and PIRs that are actually counted, a keypad, whether an external siren is in the carton, and an honest note on the response path. A contents line that does not itemise sensors is a deduction. A subscription required for app arming is part of the product.
Value
25%Shelf price against what the carton contains. The lowest price is not the best value when the sensor count is missing.
These twelve kits are self-fitted wireless sets from amazon.co.uk, not a staffed receiving centre. A siren plus a phone push is self-monitoring. Cellular backup, SMS, Alarm Calls and a staffed centre are different, and police attendance needs an NSI or SSAIB installer, PD 6662:2017, BS 8243, a compliant centre and a URN. Do not put 999 in a dialler. Prices below are the captured shelf prices on 19 October 2026.
An alarm system in this comparison is a complete wireless kit you fit yourself: a hub or panel, door and window contacts, passive infrared sensors, a siren or a sounder in the base, and a keypad, remote or app. On amazon.co.uk you are buying a system you answer yourself. It is not a police unique reference number. None of the twelve listings states an EN 50131 grade. The response path is the first split. A siren plus a phone push is self-monitoring.
Pack S is one contact and one PIR. That is a flat or a first door, not a house. Ring’s own labels step up: M is two and two, L is four and three, XL is six and three. A missing door stays open to a quiet entry.
A phone alert over Wi-Fi stops when the broadband stops. Cellular backup, SMS and a staffed centre are different. A 4G or GSM bullet still needs a SIM. Ring sells cellular backup on a plan. The X-Sense AS05 has no battery backup on the base.
Do not screw a siren to a shared wall, and do not point a PIR at a radiator. Do not copy Ring’s pet note (lowest sensitivity, from 2.1 metres, under 22 kg) onto other brands. Renters need a written yes before screws or an outside box. A neighbour’s long siren, with no crime in progress, is a council noise issue.
The first test is who answers. A local siren and a push to your phone is self-monitoring: you, or someone you have asked, have to respond. Cellular backup, an SMS, Ring Alarm Calls and a staffed centre are separate, and an app bullet does not mean the police are coming. Police attendance needs an NSI or SSAIB installer, PD 6662:2017, BS 8243, a compliant centre and a URN. Do not put 999 in a dialler. None of these twelve listings states an EN 50131 grade. Then the fee, checked on the day.
Count contacts against the doors you use, then the PIRs, then ask whether the outside siren is in this carton. Ring’s labels are a sketch: Pack S is one contact and one PIR, M is two and two, L is four and three, XL is six and three. The Yale IA-320 and the Yale HSA each start with one contact and two PIRs, plus an external siren. The X-Sense AS05 has two contacts and one PIR. The AS08 has four and two. XUK lists eight contacts and four PIRs. LWOHSI and Swokely do not count the sensors.
Three typical situations, each with a recommendation from this comparison.
You want one contact, one PIR and adhesive pads, and you will answer the phone yourself. You need written permission before screws or an outside box. Ring Alarm Pack S is that small carton. The base station is the siren, and the listing says a plan is required for app arming.
Match the pack to the bedrooms, then read the plan. Ring Alarm Pack L with outdoor siren is listed for two- or three-bedroom homes and puts the outside box in the first carton. App or Alexa arming, Alarm Calls and cellular backup are a separate subscription.
You want Yale’s outside siren and the 200 metre claim, and you accept that a distant garage may still be out of range. The Yale IA-320 Sync is mains, with two PIRs and one contact. The listing does not state a GSM or 4G path.
The top pick is the X-Sense AS05, score 90, at about £59.49, with 4.5 from 137 reviews, two contacts, one PIR and a keypad. There is no outdoor siren and no battery backup, so a power cut drops the Wi-Fi alerts. The best value is the Yale HSA Essentials, score 88, at about £81.88, because that price includes an external siren, six AAA cells and 4.4 from 997 reviews, and the bullets state no monitoring fee. The X-Sense AS08 also scores 88 and does not take the badge: reviewers say there is no outside siren. None of these scores is a measured siren test or a police unique reference number.
X-Sense AS05
Highest score, 90, at about £59.49, with 4.5 from 137 reviews and a counted indoor kit.
Yale HSA Essentials
About £81.88 includes an external siren, six AAA cells and 4.4 from 997 reviews, with no monitoring fee on the bullets.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources used for this comparison. Listing prices, stars and review counts are from amazon.co.uk on 19 October 2026.
Expert source (DIY & tools): Charlie White (Charlie DIYte) (external profile) – public expert commentary used as a research source, not as a contributor to our pages.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the UK listing lines captured on 19 October 2026. We did not run a lab test.
