Quick Answer: Choose SimpliSafe if you want a self-installed alarm system with no contract, the lowest starting equipment cost around $250, and the freedom to cancel monitoring anytime, according to SimpliSafe. Choose ADT if you’d rather put little or no money down today and have a technician handle the entire setup — its equipment is typically bundled into the monthly bill, but that convenience comes with a 36-month contract and $49.99-$59.99/month monitoring, per SafeHome.org. SimpliSafe is the budget, no-commitment DIY alarm; ADT is the $0-down, professionally installed one.
Last updated August 7, 2026.
ADT and SimpliSafe sit at opposite ends of the security-system spectrum. ADT is the professionally installed, professionally monitored incumbent — a technician sets everything up, and the equipment cost disappears into a monthly bill you’re contracted to pay for three years. SimpliSafe is the self-install alternative built specifically to avoid that model: order equipment, peel-and-stick the sensors yourself, and pay for monitoring month to month with no commitment at all. Both dispatch real monitoring agents when an alarm is confirmed. Here’s how the two actually compare.
ADT vs SimpliSafe: at a glance
| Factor | ADT | SimpliSafe |
|---|---|---|
| Core product | Professionally installed system, equipment typically bundled into monthly bill | Self-install alarm system (base station + sensors), cameras as add-ons |
| Starting equipment cost | Packages start ~$599, can exceed $1,500 for larger builds | ~$250 for basic equipment; $500-$800 fully equipped w/ cameras |
| Installation | Professional only — technician required, fee $99-$199 | DIY self-install, no technician needed, no installation fee |
| Contract | 36 months, nearly always required | None, ever — cancel monitoring any month |
| Early termination fee | Remainder of 36-month balance | None |
| Professional monitoring | $49.99-$59.99/mo | Standard $22.99/mo, Core $32.99/mo w/ video-verified alarms |
| Indoor camera price | Nest Cam Indoor (wired) — $99.99 | Wireless Indoor Camera — $149.99 |
| Outdoor camera price | Nest Cam Outdoor / Floodlight — $149.99-$279.99 | Outdoor Camera Series 2 — $199.99 |
| Camera hardware | Rebadged Google Nest (Pro Install) or ADT-branded Blu | SimpliSafe-branded, budget-positioned add-ons |
| Best for | $0-down buyers who want a technician and don't mind a contract | DIY buyers who want the lowest cost and zero commitment |
ADT vs SimpliSafe by the numbers
- $599-$1,500+ vs ~$250: ADT’s packages start around $599 and can exceed $1,500 for larger builds, according to SafeHome.org, though that cost is typically bundled into the monthly bill rather than charged upfront. SimpliSafe’s basic equipment starts around $250, and a fully equipped system with cameras for a typical three-bedroom home usually totals $500-$800, according to SimpliSafe.
- 36 months vs no contract: ADT requires a 36-month monitoring contract in nearly every case, according to SafeHome.org. SimpliSafe never requires a contract at any price point and can be canceled without a fee at any time.
- $49.99-$59.99/mo vs $22.99-$32.99/mo: ADT’s monitoring floor sits well above SimpliSafe’s ceiling. SimpliSafe’s Core plan at $32.99/month adds video-verified alarms and live-agent Intruder Intervention — a comparable feature set to ADT’s mid-tier monitoring for roughly half the price.
Price: SimpliSafe is cheaper to start and cheaper to finish
ADT’s packages start around $599 and can climb past $1,500 for larger builds with more sensors and cameras, according to SafeHome.org — but that equipment cost is typically bundled into the monthly bill, so most ADT customers pay little or nothing out of pocket on day one. SimpliSafe’s basic equipment starts around $250, and a fully equipped system for a typical three-bedroom home — sensors, a base station, and cameras — usually totals $500-$800, according to SimpliSafe. On cameras specifically, SimpliSafe’s Outdoor Camera Series 2 runs $199.99 against ADT’s Nest-sourced Nest Cam Outdoor at $149.99-$279.99 depending on model. Securing a business property alongside either system? A free Amazon Business account unlocks quantity discounts and tax-exempt purchasing on cameras and accessories you buy separately.
Winner: SimpliSafe, for a lower starting price and a lower total cost building out a full system.
Installation & contract: SimpliSafe is DIY and commitment-free, ADT is professional and locked-in
ADT’s installation fee runs $99-$199 depending on package size, and a technician handles the entire setup, according to SafeHome.org. That professional install comes bundled with a 36-month monitoring contract in nearly every case, regardless of payment method — canceling early triggers an early termination fee equal to the remaining balance on that term. SimpliSafe is built for the opposite experience: sensors and cameras that self-install with basic tools in under an hour, no installation fee, and no contract at any price point — monitoring can be canceled any month with no penalty, according to SimpliSafe.
Winner: SimpliSafe, for zero installation cost, zero contract risk, and a same-day DIY setup.
Monitoring: SimpliSafe matches ADT’s dispatch capability for less
ADT’s professional monitoring ranges $49.99-$59.99/month, topping out with facial-recognition detection at the higher tier, according to SafeHome.org. SimpliSafe’s Standard plan runs $22.99/month, and its Core plan at $32.99/month adds video-verified alarms plus Intruder Intervention — a live agent can view a triggered camera and speak to an intruder directly to help deter a break-in and speed up police response, according to SimpliSafe. Both companies route confirmed alarms to real monitoring agents who can dispatch police, fire, or medical responders.
Winner: SimpliSafe, for matching ADT’s real-agent dispatch capability at roughly half the monthly price.
Camera hardware: ADT resells Nest, SimpliSafe sells its own budget lineup
ADT’s Pro Install camera lineup isn’t ADT hardware at all — it’s rebadged Google Nest cameras, the same Indoor ($99.99), Outdoor ($149.99), battery ($179.99), and Floodlight ($279.99) models Nest sells directly, according to SafeHome.org. ADT’s separate Blu line swaps in ADT-branded, self-setup equipment for buyers who want ADT’s monitoring without the Nest hardware or the 36-month contract. SimpliSafe’s camera catalog — Wireless Indoor Camera, Wireless Outdoor Camera Series 2, and Video Doorbell Pro — is priced and positioned as budget add-ons to the base alarm system rather than premium standalone hardware, according to SimpliSafe. Buyers who want the Nest ecosystem specifically, without ADT’s contract, can compare it directly in our best Nest camera guide.
Winner: Tie. ADT’s Nest-sourced hardware has broader third-party name recognition; SimpliSafe’s cameras are cheaper and purpose-built as add-ons rather than standalone products.
Which should you buy?
- Choose ADT if you want $0-down setup, a technician handling every step, and don’t mind that its cameras are the same Nest hardware Nest sells directly, bundled behind a 36-month monitoring plan.
- Choose SimpliSafe if you want to self-install today, keep total equipment cost under $800, and never risk a termination fee — start with Standard and upgrade to Core for video verification whenever you want.
- Skip ADT if price-sensitive. Its $0-down convenience is offset by the highest monitoring price in this comparison and a 36-month contract with a real early-termination penalty; SimpliSafe avoids both.
The bottom line
SimpliSafe wins on price, installation, and contract flexibility — cheaper equipment, a DIY setup in under an hour, no installation fee, and no contract at any price point, with a Core monitoring plan that matches ADT’s real-agent dispatch for roughly half the cost. ADT wins on convenience — a technician handles the entire install and equipment is bundled into the bill, so $0-down is realistic — at the cost of the highest monitoring price here and a 36-month commitment. Budget-conscious, DIY-comfortable shoppers get more for less from SimpliSafe; buyers who specifically want a technician and don’t mind a contract should budget for ADT. Still comparing options? Our ADT vs Ring comparison weighs ADT against a camera-first, no-contract alternative, our ADT vs Vivint comparison does the same against another professionally monitored system, our SimpliSafe vs Ring comparison puts SimpliSafe against the same camera-first alternative, our Vivint vs SimpliSafe comparison weighs it against Vivint, and our best SimpliSafe camera guide breaks down all three cameras in SimpliSafe’s lineup on their own.