Find Your perfect system

Interstate Alarm Company – We are a full service alarm company specializing in monitoring, residential and commercial security, fire, system service, inspections, access control and camera systems

Contact Our Office

Call: (800) 344-4546
Email: [email protected]



24/7 Monitoring

We’ll Build A System For Your Needs

We don’t just ‘unbox’ a system and put it up, we find out first what will meet your needs. We then use our many years of experience, trained technicians, and quality equipment to create a system that will help keep your loved ones safe and protect your property against expensive damages.


DSC Neo Alarm System Touchscreen Keypad

No Landline – No Problem!

With the latest technology driven by, DMP, DSC and Honeywell, monitoring and interactive services are combined using cellular or network communicators, providing the fastest and most reliable signaling and control

Get a Free Estimate & Let Us Do the Rest

Interested in getting a security system from Interstate Alarm? Click the button below to let us know how to get in touch. We will reach out to discuss your needs, set up a time with you to do a walk-through and provide you with a free estimate.


Featured Products

We use equipment from the leading industry manufacturers to provide trouble-free installations and years of service. Check out some of our featured products below:

DSC Power Series Neo


DMP Virtual Keypad


Reliable 24/7 monitoring, professional and courteous installation, kind and helpful staff and the best part – LOCAL. Can’t say enough good things about our experience with Interstate Alarm Company!”

Debbie Crawford

Happy Customer

We have been with Interstate Alarm Company for many years and like that they are a local business. Over the years we’ve had questions, upgrades and regular maintenance and each experience has always been professional and pleasant. I would highly recommend Interstate Alarm company to anyone thinking about a security system for their home or business.”

Tom Stone

Happy Customer

Facebook Posts

Whether from a burst pipe, an overflowing washing machine or a crack in the foundation, a water sensor detects the presence of water and alerts you to potential flooding before extensive and costly damage may occur.Contact us today for more information. Offices in Missoula and Kalispell at your service. ... See MoreSee Less
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One of our favorite customers Big Sky Waterpark opens on June 19th - check them out! ... See MoreSee Less
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Great Father's Day gift idea from one of our favorite customers Canyon River Golf Club ⛳️Gift Certificates Available!Stop in the pro shop, call 721-0222 or purchase online at ... See MoreSee Less
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Congratulations to one of our favorite customers Kalispell Brewing Company 🍻🎉7 Days of 7 Years continues! We are so proud of our brewers and staff for bringing home some wins at the Montana Brew Fest!Gold: Two Ski Brewski PilsnerGold: Snowslip StoutBronze: Polka Bear GPANow let’s cheers to all of the amazing Montana brewery families out there!🍻 Congratulations to a job well done! ... See MoreSee Less
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An Alarm Company You Can Trust

For close to 50 years our family has provided friends, neighbors, small businesses and large with the best systems around. Now, with our third generation learning the ropes, we hope to continue for many more. Our employees live, play and work here, giving back to the community, supporting other local businesses.


No Hidden Fees

We don’t use bait and switch sales tactics. We don’t quote a minimal system and try to upsell you at the time of install. We set out all options and pricing up front and deliver guaranteed pricing for 30 days. These are important factors to keep in mind while comparing estimates which often contain variances like minimal or even missing equipment in order to show a low price.

We care about more than your tools

Sure a burglar alarm system is a great protection tool but we care a lot about people’s lives. Monitored combination smoke/carbon monoxide detectors can provide critical notification if someone is overcome by smoke inhalation, breathing poison gas, or gone from home when a fire starts. And those nasty water leaks! They can cause thousands of dollars of damages if not caught quickly. To us, those are some of our most important tools.


Insurance Discounts

Most insurance companies offer homeowners a premium discount for having a monitored alarm system, and an additional discount for fire devices. These discounts are often greater than the expense of monthly central station monitoring. Check with your insurance agent about available savings.

Find out about joining our family today