From the largest banks & credit unions in the state, to the smallest cabin on the lake…Cayer Security is keeping Maine SAFE.

Financial Services

We take pride in providing an unsurpassed level of service to Maine banks and credit unions, with superior customer service and quality workmanship at an affordable price.

Learn more about our

Commercial Services

We can customize an alarm system to fit your individual business needs. With our wide variety of options, you’ll easily find a way to keep your company safe at a reasonable cost.

Learn more about our

Residential Services

Whether you are looking for a basic alarm system to protect your home or a complete custom system with multiple components, we are here to help!

Learn more about our


We have 25 years of experience in the security industry: designing, installing, and maintaining security systems. Our professional technicians are licensed and insured.

Our mission is to provide an unsurpassed level of service to our customers, ensuring that their safety and security needs are met efficiently.


“We had Cayer Security recently installed in our home. We have a big house with places I cannot see. I sleep better knowing we have Cayer Security watching over us.”

–Deb M.

Read more testimonials »