SimpliSafe vs. ADT

SimpliSafe vs. ADT: What's the difference?

SimpliSafe has carved out a strong position in the affordable DIY security space. Its sensor lineup covers both intrusion detection and environmental hazards, and higher-tier plans include live agent intervention for real-time response.

ADT is the "set it and forget it" choice for homeowners who want a certified technician to handle everything. With more than 140 years in the industry and Google Nest integration, it pairs a long track record with modern smart home capabilities.

What we like about SimpliSafe

• Active Guard technology: The top-tier plans deploy live security agents alongside AI to actively deter intruders using two-way audio and camera sirens — a capability that typically comes only from premium providers.
• Scalable affordability: A low entry price and month-to-month service let you start with the basics and add components over time without committing to a long-term plan.

What to consider: SimpliSafe's professional monitoring plans run higher than some DIY rivals like Ring and Cove. Because setup is entirely self-directed, you're responsible for placing sensors correctly — though the process itself is simple.

What we like about ADT

• Service reliability: ADT backs its service with guarantees including theft protection and a six-month money-back guarantee.
• Smart integration: It connects with Google Nest cameras, doorbells and smart locks, unlocking features like facial recognition through the Complete plan.

What to consider: The three-year contract is the biggest trade-off when choosing ADT's professional service. Equipment costs are also relatively high compared to DIY alternatives.

SimpliSafe vs. ADT: System and installation

SimpliSafe is purpose-built for quick DIY setup, while ADT sends a certified technician to handle everything. Here's how the two approaches compare.

SimpliSafe system and installation

• System type: SimpliSafe runs on a wireless, modular architecture anchored by a base station with a built-in cellular chip and a 24-hour backup battery, keeping the system operational during power outages or tampering attempts.
• Installation options: Setup is DIY by default and requires no tools — most sensors attach with adhesive strips. If you prefer professional help, third-party services like OnTech are available, typically starting around $125.

SimpliSafe equipment costs

SimpliSafe is competitively priced and frequently runs sales. Prebuilt packages start around $250 for the basic Foundation kit and climb to over $700 for comprehensive bundles with multiple cameras and environmental sensors. You can also build a custom system by purchasing components individually.

ADT system and installation

• System type: ADT uses wireless equipment that communicates over cellular networks, and every plan includes professional monitoring from day one.
• Installation options: A certified ADT technician handles the full installation, typically priced between $99 and $199, though this fee is often waived during promotional periods.

ADT equipment costs

ADT equipment packages start at $599 and can exceed $1,500 depending on the size and complexity of your setup. Financing is available, letting you spread equipment costs across your contract term.

SimpliSafe vs. ADT: Monitoring plan costs

SimpliSafe offers month-to-month monitoring with no long-term commitment, while ADT locks customers into traditional multi-year contracts through its established monitoring network.

SimpliSafe monitoring plans

• Standard Monitoring: $21.99 per month. Covers 24/7 police dispatch and cellular backup, but does not include video verification or camera recording.
• Core (formerly Fast Protect): $31.99 per month. Adds visual alarm verification, unlimited camera recording and "Intruder Intervention" for indoor cameras.
• Pro / Pro Plus: $49.99 to $79.99 per month. Unlocks "Active Guard Outdoor Protection," giving live agents the ability to watch outdoor cameras overnight (Pro) or around the clock (Pro Plus) and intervene via two-way audio.

Contract commitment: SimpliSafe carries no long-term obligations. Every plan runs month-to-month, and you can cancel or switch tiers at any time without incurring a penalty.

ADT monitoring plans

• Secure Plan: Starts at $28.99 to $34.99 per month. Covers burglary, fire and carbon monoxide monitoring.
• Smart Plan: Starts at $39.99 to $44.99 per month. Adds smart home automation features and remote control through the ADT app.
• Complete Plan: Starts at $49.99 to $59.99 per month. Includes cloud video storage, video verification for cameras and doorbells and smart home automation through Google Nest integration.

Contract commitment: ADT requires a 36-month contract in most states, with a 24-month option available to California residents. Early cancellation means paying 75% of the remaining balance on your contract.

» COMPARE: SimpliSafe vs. Ring

SimpliSafe vs. ADT: Equipment and technology

SimpliSafe's proprietary sensor lineup is designed for easy self-management, while ADT's ecosystem leans into Google Nest integration and broader smart home compatibility.

Reputation on ConsumerAffairs

Bottom line: SimpliSafe or ADT

Choose SimpliSafe if you want no-contract DIY security with room to expand your setup over time — it covers more environmental hazards and offers more proactive monitoring than most DIY rivals, though its premium plans carry a higher price tag than Ring or Cove.

Choose ADT if you want hands-off, professionally installed security and are comfortable committing to a multi-year contract — you're paying a premium for a well-established monitoring infrastructure and a long operating history, so if cost flexibility matters more, DIY systems are the better fit.

» MORE: ADT vs. Frontpoint