AT&T Digital Life only offers one home security equipment package at $549.99, with a single professional monitoring option at $39.99/mo. ADT’s pricing is much lower, starting at just $99 for equipment and $35.99/mo. for monitoring.

ADT charges its customers between $99 and $199 for professional installation, which is mandatory. With AT&T Digital Life, professional installation is also required, but it’s free.

ADT and AT&T Digital Life both offer comparable devices, including cameras, sensors, and smoke detectors. But AT&T is less transparent and doesn’t offer as many equipment customization options. AT&T’s security system doesn’t come inclusive with any smart home devices. ADT, however, offers a wider variety of customizable packages with easy add-ons like smart home devices.

AT&T Digital Life has a shorter service agreement than ADT. AT&T Digital Life customers have to sign a two-year service contract, while ADT requires customers to sign a three-year contract.

ADT is well-known for its six-month money-back guarantee. The guarantee refunds installation and monitoring fees if a system issue cannot be resolved. AT&T Digital Life offers a shorter trial period of just 14 days.

Both ADT and AT&T Digital Life have free mobile apps for smartphone control. These apps have similar functionality, allowing you to arm and disarm your alarm system, view live feeds of your security cameras and receive mobile notifications if sensors are triggered.