LOCAL. TRUSTED. PROVEN.

Home Alarms, CCTV & 24/7 Monitoring in Niagara

Expert Design • Professional Installation • 24/7 Local Support

Protect your family, home and property with a proactive security strategy. From new smart alarm installations to High-Definition CCTV systems, we design custom solutions that keep you connected to what matters most. Since 1985, Alliance has been the trusted partner for Niagara’s homeowners.

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Or Call Local: 905-688-3223

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In-House Technicians

Our team is 100% in-house and non-commissioned. You get honest security advice tailored to your home, not a high-pressure sales pitch.

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Local ULC Monitoring

We watch over your home 24/7. In an emergency, we dispatch Niagara police and fire services instantly.

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Custom System Design

We don't use generic "one-size-fits-all" kits. Our experts design a security plan specifically for your home's unique layout.

TOTAL HOME PROTECTION

Complete Residential Security Solutions

Security technology changes, but trust shouldn't. Since 1985, we have built our reputation on a simple promise: we treat you like family, not a number.

Smart Alarms & Automation

Protect your family with proactive intrusion and fire detection. Our systems integrate seamlessly with smart locks, lighting, and thermostats, giving you total home control and 24/7 monitoring from a single app.

View Alarm Systems

HD Home CCTV Systems

Keep a watchful eye on your property with professional High-Definition cameras and video doorbells. Enjoy crystal-clear night vision, AI detection, and secure local recording with zero monthly video fees.

View Camera Systems

THE ALLIANCE DIFFERENCE

Niagara’s Local Security Experts Since 1985

When it comes to protecting your home, local knowledge matters. Since 1985, Alliance Security has been the Niagara region's dedicated partner in safety. Unlike national call centres that treat you like a number, we are your neighbours in St. Catharines, Welland and Niagara Falls.

Professional Craftsmanship: We believe true security starts with a professional installation. Our in-house, non-commissioned technicians take the time to understand your property's unique layout—whether it’s a historic home in Niagara-on-the-Lake or a new build in Thorold. We ensure clean cabling, optimal camera and security sensor placements for total coverage and we don't leave until you feel completely comfortable using your new system.

FLEXIBLE INSTALLATION OPTIONS

Find the Right Security Solution for Your Home

Already Have A Security Alarm System?

Don't replace equipment that isn't broken. We specialize in taking over monitoring for existing DSC, Honeywell, and Paradox panels. We can often reuse your existing wired sensors while upgrading just the keypad and panel—giving you a modern smart system without the cost of a full rewire.

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Keep Your Hardwiring: We test and reuse your existing door and window contacts to save you money on installation.

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Upgrade the Brain: We replace outdated panels with a modern smart hub, giving you instant smartphone access and LTE reliability.

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Seamless Transition: We handle the upgrade and testing to ensure a smooth switch to our local monitoring.

Switch to Alliance

Need A New Alarm System?

Whether you are building, renovating, or securing an existing home, we design modern systems that fit your lifestyle. Enjoy top-tier wireless security using encrypted PowerG technology, providing massive range and reliability without the need for messy construction or drilling.

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Clean Installation: No drilling or unsightly wires running along baseboards.

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Reliable Wireless Tech: We use long-range, encrypted sensors (PowerG) for superior reliability.

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Flexible Protection: Easily add sensors to detached garages, sheds, or hard-to-reach windows.

Start Your Design

SMART HOME AUTOMATION

Total Control from Anywhere

Forget the panic of wondering if you locked the front door. With our top-rated mobile app, your security system, cameras, lights, and locks are always within reach—whether you are at work in Toronto or on vacation.

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Live Video

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Smart Locks

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Temp Control

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Instant Alerts

LOCAL REVIEWS

Trusted by Niagara Families

See why your neighbours in St. Catharines and beyond rely on Alliance for their safety and peace of mind.

      EXCELLENT  
   Based on 68 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Lisa 
 
 
 
 Trustindex verifies that the original source of the review is Google. From the very beginning my experience with Alliance has been exceptional.  They scheduled my appointment quickly. Kent (sales) was informative, and gave me a great price.  My installation was done when I wanted without any problems.  Mitch (the technician) was also informative, knowledgeable and thorough.  Also, the entire staff is friendly and highly accessible.  I would recommend Alliance Security Niagara without hesitation. Lisa
  
 
      Posted on Google  
   
   Roberto 
 
 
 
 Trustindex verifies that the original source of the review is Google. The owners and staff are always courteous and very focused on quality customer service. I recently interacted with the owner of the company and one of the IT technicians. Both of them were excellent, as usual, in helping to resolve/answer the questions we had and assist us with upgrades to our alarm equipment. Thank you, Alliance Security Niagara!
  
 
      Posted on Google  
   
   Jill Husak 
 
 
 
 Trustindex verifies that the original source of the review is Google. These guys are the best ! We love our new system! Can’t thank them enough for all the help ! We have recommended them to all our friends, colleagues and neighbours!
  
 
      Posted on Google  
   
   Liz Fortushniok 
 
 
 
 Trustindex verifies that the original source of the review is Google. Dealing with Alliance today to set up our home security was a real pleasure.   Their technician.Andrew, was professional and very informative.   Would highly recommend
  
 
      Posted on Google  
   
   Michael Deluca 
 
 
 
 Trustindex verifies that the original source of the review is Google. Alliance Security is a 5-star company.  Kent and his team worked around our tight schedule and helped us get secured.  Highly recommend!
  
 
      Posted on Google  
   
   Melissa Biancaniello 
 
 
 
 Trustindex verifies that the original source of the review is Google. 12/10 Service! Knowledgeable, friendly and supportive!
  
 
      Posted on Google  
   
   Pauline 
 
 
 
 Trustindex verifies that the original source of the review is Google. Mitch who installed my system was amazing. He patiently explained how to operate my new system (my old one was 30 years old!) and made modifications based on my individual needs. I am a senior and not that tech savvy, so having Mitch patiently walk me through the Alliance app was greatly appreciated. Other security service providers prior to this did not offered this level of attention to detail. I look forward to using my new system. Thanks Mitch and Alliance!
  
 
      Posted on Google  
   
   gail martin 
 
 
 
 Trustindex verifies that the original source of the review is Google. Alliance is extremely professional and always there to help. Andrew saw the problem and was very efficiently rectified it. Would highly recommend them.
  
 
  
  
 
     Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

LOCAL NIAGARA FLEET

Real People, Right Around the Corner

We aren't a remote call centre. We are based right here at 46 Niagara Street in St. Catharines. When you call Alliance, you are speaking to local experts who live in your community and know your neighbourhood’s specific security needs.

Serving: St. Catharines • Niagara Falls • Welland • Thorold • Lincoln • Beamsville • Grimsby • Fort Erie • Port Colborne • Niagara-on-the-Lake

Alliance Security Office and Van Fleet on Niagara Street St. Catharines

Experience the Alliance Security difference.

Call 1-877-427-7263 or