Alarm.com vs. ADT: Which Security System Is Right for Your Home?
Looking to secure your home with the right solution?
You’ve come to the right place—St. Louis Alarm Company is here to help.
When it comes to home security systems, two of the most well-known names are Alarm.com and ADT. While both offer robust protection and smart technology, they differ significantly in how they operate, integrate, and serve your home.
In this comparison, we’ll break down the key differences so you can make an informed decision about which system best fits your needs.
Alarm.com Overview
Alarm.com is a cloud-based security platform that works with a range of professional-grade equipment. At St. Louis Alarm Company, we’re proud to be a certified Alarm.com service provider, delivering smart security and automation features that are second to none.
Key Features:
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Professional installation by our licensed team
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100% wireless with cellular communication—no landlines needed
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Crash & Smash protection: system keeps communicating during break-in attempts
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Geo-Services: automations triggered by your smartphone’s location
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Smart home integration: lights, locks, thermostats, and more
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Self-monitoring or central station monitoring
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Mobile app access: view cameras, arm/disarm system, receive alerts
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Battery backup in case of power loss
Alarm.com also supports automation scenes and custom notifications, giving you total control over your home from anywhere.
Alarm.com Service Plans
At St. Louis Alarm Company, we offer three flexible plans:
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Standard: 24/7 monitored security
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Gold: Basic + app control and automation
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Elite: Control + video monitoring and storage
Both Gold and Elite plans include cellular backup, remote access, and customizable options to grow with your home.
ADT Overview
ADT is one of the oldest names in home security, known for its national presence and long-term contracts. Their recent partnerships with Google Nest have introduced more smart home compatibility, and their systems are professionally installed.
Key Features:
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Long-standing reputation with over 150 years in the industry
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Professional monitoring and emergency response
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Equipment includes motion detectors, entry sensors, CO/smoke detectors
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Smart home control through the ADT+ mobile app
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Integration with Google Assistant and Nest products
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24-hour backup battery for outages
ADT works well for customers who want a well-known brand and are comfortable with longer service commitments.
ADT Packages
ADT typically offers:
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Secure Home: Basic security equipment
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Smart Home: Adds automation features
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Video & Smart Home: Includes video monitoring and smart home control
Each package can be expanded, but initial equipment costs and monthly fees can vary significantly.
Mobile App Comparison (2025)
Today, mobile control is at the heart of every home security system. Here’s how Alarm.com and ADT stack up in 2025:
| Feature | Alarm.com | ADT+ App |
|---|---|---|
| Device compatibility | Works with multiple manufacturers | Primarily Google Nest ecosystem |
| Custom scenes & automation | ✔️ Yes | ✔️ Yes |
| Multi-location management | ✔️ Business + Home | ❌ Residential only |
| Real-time alerts | ✔️ Instant + customizable | ✔️ Instant + AI verification |
| Video integration | ✔️ Live/recorded viewing | ✔️ Live with some AI features |
| Geo-fencing | ✔️ Location-triggered automations | ❌ Not available |
Camera Systems: Alarm.com vs. ADT
Alarm.com excels in advanced camera tech with customizable motion zones, smart detection, and full integration with home automation features. When your camera spots movement, it can automatically trigger your lights or lock your doors.
ADT provides reliable, durable cameras with live monitoring and direct access by their monitoring center for quick response—but it may lack the fine-tuned control and AI capabilities that Alarm.com offers.
Pros and Cons at a Glance
| Feature | Alarm.com (via St. Louis Alarm Co.) | ADT |
|---|---|---|
| Local customer service | ✔️ Yes | ❌ Nationwide call centers |
| Custom smart home control | ✔️ Full customization | ⚠️ Limited to Google/Nest |
| Self-monitoring option | ✔️ Available | ❌ Not standard |
| Contract flexibility | ✔️ Flexible terms /No Contracts | ❌ Long contracts required |
| DIY option | ✔️ Self-install available | ✔️ Self-install available |
| Equipment quality | ✔️ High-quality options | ⚠️ Varies by package |
So, Which Should You Choose?
If you’re looking for a customizable, smart home-compatible, professionally installed security system with local support, Alarm.com through St. Louis Alarm Company is the clear choice.
If brand recognition and Google Nest integration are your top priorities, and you’re okay with national service and long-term contracts, ADT is a solid option.
Frequently Asked Questions
Are Alarm.com and ADT the same company?
No. Alarm.com is a technology platform used by many independent providers, including St. Louis Alarm Company. ADT is a national security provider with its own proprietary systems.
Does ADT use Alarm.com?
No. ADT uses its own platform and mobile app (ADT+), not Alarm.com.
Can I use Alarm.com without a provider?
No. Alarm.com works through licensed service providers like St. Louis Alarm Company.
Is Alarm.com compatible with other smart devices?
Yes! Alarm.com integrates with brands like Yale, Kwikset, LiftMaster, and Z-Wave-compatible devices.
Get Your Free Quote Today
We’ve been protecting homes and businesses in Missouri for over 20 years. As your local, family-owned security provider, we offer personalized service you won’t find with the big national names.
📞 Call us today at 636-942-5276
🌐 Visit us at www.stlalarmco.com
📍 Proudly serving St. Louis and surrounding areas
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