Prices and policies checked October 20, 2026 on the official pages linked below, plus independent reviews where noted. Promotions change often, so confirm before you buy. Gadget Sentinel may earn a commission if you buy through links on this site, at no cost to you. We did not hands-on test either system for this article. Test results we mention are attributed to the people who ran them.
Choosing between SimpliSafe and ADT looks like one decision, but it is really three. Who installs the system? Who responds when an alarm goes off? And how long are you committed? SimpliSafe is built around self-installation and month-to-month plans. ADT’s classic offer is a technician visit and a multi-year monitoring agreement, but ADT also sells a separate do-it-yourself line, ADT Blu, with no long-term contract.
Our preliminary verdict: for most renters, first-time buyers, and cost-conscious homeowners, SimpliSafe is the safer starting point because it is cheaper to leave and cheaper to run. ADT Pro Install earns its higher price if you want a technician to design and install everything, have a larger or more complex home, or want Google Nest cameras built into the system. The right answer depends on cost, installation preference, monitoring needs, and how much contract flexibility you want. Here is how the numbers and features break down.
SimpliSafe vs ADT at a Glance
ADT is split into two products here because they differ on price, contract, and backup.
| SimpliSafe | ADT Pro Install | ADT Blu (DIY) | |
|---|---|---|---|
| Installation | You install it (free). Optional technician setup from about $125 | Technician installs. ADT currently advertises a $99 starter system with pro install included (call to claim, ends 11/9/26) | You install it, guided by the ADT+ app |
| Starter equipment (list) | Foundation $250.96; Starter $282.94; Lighthouse (1 outdoor camera) $482.93 | Base package $269 (base, 1 door/window sensor); custom quotes beyond that | Security Starter Kit $249 list, $99 on promo (base, motion sensor, 3 door/window sensors) |
| Professional monitoring | $22.99 to $79.99 a month, five paid tiers | ADT’s monitoring page says “starts at $49.99”; its products page shows “starting at $29.99” tied to a 36-month plan | Pro-Protect: $24.99 a month without cameras, $34.99 with cameras |
| Self-monitoring | Free app tier, or about $9.99 a month with camera recordings | None listed for Pro Install | Self-Protect $14.99 a month (camera plan view); cameras-only plan $9.99 |
| Contract | None; cancel any time | 36-month plans tied to promotions, with early cancel fees | None; cancel or switch any time |
| Cellular backup | With professional monitoring plans | Included; alarm events can go out over cellular if Wi-Fi drops | Only on the Pro-Protect plan |
| Smart home | Alexa and Google Assistant reported | ADT+ app, Google Nest cameras, smart-home automation on higher plans | Google Nest Hub (2nd gen) and Z-Wave; Nest cameras not compatible |
| Guarantee | 60-day money-back, free return shipping | 6-month money-back with conditions | 30-day free returns |
| Ideal buyer | Renters, budget buyers, flexibility seekers | Hands-off homeowners, larger homes, Nest fans | Buyers who like ADT’s monitoring but want DIY and no contract |
Sources: SimpliSafe’s official monitoring plan details, ADT’s current professional monitoring options, ADT’s official equipment and package information, plus ADT Blu pages and package prices from Security.org and SafeHome (see the fact-check notes).
SimpliSafe vs ADT: Main Differences
DIY vs Professional Installation
SimpliSafe is DIY-first. Sensors use adhesive backing, the base station plugs in, and the app walks you through pairing. Security.org’s testers set up a five-sensor, two-camera system in under 45 minutes. If you would rather not, SimpliSafe sells technician setup starting at about $125 (older reviews still cite $79, so check at checkout).
ADT Pro Install is the opposite. A technician walks the home, places devices, tests the system, and shows you the app. Security.org’s reviewer reported just under two hours for a four-camera, five-sensor setup. ADT says someone over 18 must be present, and the Google account owner must be there if Nest devices are installed. Security.org’s broader research puts typical professional install fees near $100 and up, and ADT’s current promo bundles install into a $99 starter system.
If your priority is the DIY side of things, compare ADT’s own DIY line, ADT Blu, which ADT says you can set up in under an hour with no long-term contract. For the general trade-offs, see our guide to DIY vs. professional home security systems. Security.org’s DIY versus professional installation analysis also notes that DIY is cheaper and flexible but more prone to placement errors.
Equipment and Security Features
Both brands cover the basics: base station, keypad, entry sensors, motion sensors, smoke and CO detection, indoor and outdoor cameras. The differences are in the details.
- SimpliSafe makes its own hardware and sells it in packages or build-your-own. Its Pro and Pro Plus plans add live agents who can talk through an outdoor camera. SimpliSafe describes this as Active Guard Outdoor Protection (overnight on Pro, around the clock on Pro Plus). These are SimpliSafe’s own capability claims. Independent evidence of real-world outcomes is limited, so treat the deterrence benefit as promising rather than proven.
- ADT Pro Install leans on Google Nest cameras and a wider device catalog. ADT’s top “Complete” monitoring tier is for systems with cameras and adds live video verification and 30 days of stored clips through Nest Aware.
- ADT Blu is a separate product line with its own base, sensors, and cameras. ADT’s Blu cameras require an added $10 a month, and ADT says Nest cameras are not compatible with Blu.
SafeWise’s SimpliSafe vs ADT comparison argues that ADT suits larger homes and that its equipment selection is broader. We have not verified device limits for either brand, so ask for them in writing if you have a big layout.
Professional Monitoring vs Self-Monitoring
Self-monitoring means your phone gets the alert and you decide whether to call emergency services. Professional monitoring means a center verifies the alarm and requests dispatch. SimpliSafe offers both, plus a middle tier with camera recordings only. ADT Pro Install lists professional monitoring only. ADT Blu offers both. We cover the self-monitored route in more depth in our guide to self-monitored alarm systems.
Keep in mind that installation method and monitoring method are separate decisions. A DIY install can still be paired with professional monitoring on both brands, which is often the best-value combination.
Smart Home Integration
SimpliSafe’s integrations are narrower. Security.org and SafeWise report Alexa and Google Assistant support, with a few extras such as Nest thermostats and August locks. ADT Pro Install is the stronger smart-home play, centered on the ADT+ app and Google Nest products. Automation is part of ADT’s Smart and Complete plans. If you do not care about automation, this difference may not matter to you.
Contracts, Cancellation and Flexibility
SimpliSafe has no contract on any plan, and equipment you own outright goes with you. ADT’s pro-install promotions require a 36-month monitoring plan, and ADT’s own footnotes say early cancel fees apply. SafeWise and Home Security Radar both report that the early-termination charge can reach 75% of remaining payments, but we did not find that figure in the ADT pages we opened, so treat it as unverified and read your contract.
Some sources say ADT Pro Install needs no contract if you pay for equipment upfront. We could not confirm that on ADT’s pages either. Ask for the contract terms in writing before you sign.
Moving: SimpliSafe’s peel-and-stick gear travels with you, and Security.org says the company sends a mover’s kit with fresh adhesives. ADT offers a relocation service, but a professionally installed system generally needs a new appointment, and any financing or monitoring obligation follows you to the new address.
SimpliSafe vs ADT Cost Comparison
For a broader look at budgets, see our guide to typical first-year security budgets and our breakdown of home security system costs and monitoring fees for Ring.
Equipment and Upfront Costs
| Price (list) | What’s in it | |
|---|---|---|
| SimpliSafe Foundation | $250.96 | Entry package, one entry sensor and motion detector |
| SimpliSafe Starter | $282.94 | Adds two more entry sensors (three total) |
| SimpliSafe Lighthouse | $482.93 | Starter plus one wireless outdoor camera |
| SimpliSafe Beacon | $733.90 | Four entry sensors, two motion sensors, two outdoor cameras |
| ADT Pro Install base package | $269 (or as low as $7.47 a month for 36 months at 0% APR with approved credit) | Base, one door/window sensor, yard sign, ADT+ app |
| ADT Pro Install promo | $99 | Starter system with pro install and a Google Nest camera, with a 36-month plan; ends 11/9/26 |
| ADT Blu Security Starter Kit | $249 list; $99 on promo | Base, motion sensor, three door/window sensors |
SimpliSafe prices are list prices reported by Security.org and SafeHome in mid-2026. SimpliSafe discounts frequently, so you may pay less. SimpliSafe also offers financing through a third party.
Monthly Monitoring Fees
| Plan | Monthly price | Notes |
|---|---|---|
| SimpliSafe self-monitoring with recordings | about $9.99 (33¢ a day) | No dispatch |
| SimpliSafe Standard | $22.99 (76¢ a day) | 24/7 monitoring with emergency dispatch |
| SimpliSafe Core | $32.99 ($1.10 a day) | Adds video verification and Intruder Intervention on an indoor camera, per Security.org |
| SimpliSafe Pro / Pro Plus | $49.99 / $79.99 | Adds outdoor live-agent protection overnight / around the clock |
| ADT Pro Install | “starts at” $49.99 (monitoring page) | Secure, Smart, and Complete tiers by equipment; tier prices not published |
| ADT Blu Pro-Protect | $24.99 without cameras, $34.99 with cameras | 24/7 monitoring, cellular backup |
| ADT Blu Self-Protect | $14.99 (camera view) | No professional monitoring |
A pricing caution on ADT: ADT’s products page shows Pro Monitoring “starting at $29.99” with a 36-month plan and a qualifying purchase, while its monitoring page says Pro Install monitoring starts at $49.99. Home Security Radar found even more variation across ADT’s pages. Final pricing comes from a quote, so our math uses ADT’s published $49.99 as a floor, not a promise.
Estimated One-Year Cost
Assumptions: list or promo prices as shown, before tax; no first-month-free offers; monitoring billed monthly; no permits, extra sensors, or financing charges. Like-for-like service levels are grouped together. Not every row is equivalent in equipment.
| Scenario | Equipment | Monitoring | Arithmetic | Year 1 |
|---|---|---|---|---|
| A. Intrusion only, professionally monitored | ||||
| SimpliSafe Starter + Standard | $282.94 | $22.99/mo | 282.94 + (22.99 × 12 = 275.88) | $558.82 |
| ADT Blu kit (list) + Pro-Protect | $249.00 | $24.99/mo | 249 + (24.99 × 12 = 299.88) | $548.88 |
| ADT Blu kit (promo) + Pro-Protect | $99.00 | $24.99/mo | 99 + 299.88 | $398.88 |
| ADT Pro Install promo + $49.99 plan* | $99.00 | $49.99/mo | 99 + (49.99 × 12 = 599.88) | $698.88 |
| B. With one outdoor camera | ||||
| SimpliSafe Lighthouse + Core | $482.93 | $32.99/mo | 482.93 + (32.99 × 12 = 395.88) | $878.81 |
| ADT Blu kit + outdoor camera (list $89) + Pro-Protect with video | $338.00 | $34.99/mo | 338 + (34.99 × 12 = 419.88) | $757.88 |
| ADT Pro Install with camera | not calculable | Complete tier, price not published | n/a | Quote required |
| C. Self-monitored | ||||
| SimpliSafe Starter, no plan | $282.94 | $0 | 282.94 | $282.94 |
| SimpliSafe Starter + self-monitoring with recordings | $282.94 | $9.99/mo | 282.94 + 119.88 | $402.82 |
*ADT’s $99 promo bundle includes a Nest camera, which likely moves you to a higher monitoring tier. The $49.99 floor may therefore understate the real cost.
Estimated Three-Year Cost
Same assumptions, 36 months of monitoring.
| Scenario | Arithmetic | Year 3 total |
|---|---|---|
| SimpliSafe Starter + Standard | 282.94 + (22.99 × 36 = 827.64) | $1,110.58 |
| ADT Blu kit (list) + Pro-Protect | 249 + (24.99 × 36 = 899.64) | $1,148.64 |
| ADT Blu kit (promo) + Pro-Protect | 99 + 899.64 | $998.64 |
| ADT Pro Install promo + $49.99 plan | 99 + (49.99 × 36 = 1,799.64) | $1,898.64 |
| SimpliSafe Lighthouse + Core | 482.93 + (32.99 × 36 = 1,187.64) | $1,670.57 |
| ADT Blu kit + outdoor camera + Pro-Protect with video | 338 + (34.99 × 36 = 1,259.64) | $1,597.64 |
| SimpliSafe Starter, no plan | 282.94 | $282.94 |
| SimpliSafe Starter + self-monitoring with recordings | 282.94 + (9.99 × 36 = 359.64) | $642.58 |
What the numbers say. Monitoring fees dominate over three years, so the plan matters more than the install method. SimpliSafe’s list price is higher up front, but ADT Pro Install’s monitoring floor is more than twice SimpliSafe Standard’s rate. ADT Blu lands close to SimpliSafe, and in some configurations below it, which is why it deserves a look if you like ADT’s monitoring. Sale prices can flip any of these comparisons.
Early-cancel illustration (assumption, not a quote). If you left a 36-month ADT plan at $49.99 after 12 months and the fee were 75% of the remaining balance: 24 months × $49.99 = $1,199.76 remaining; 75% of that is about $899.82. Confirm your actual fee in your contract.
Which System Is Easier to Install?
Easiest overall: ADT Pro Install, because the technician does everything, including testing and an app walkthrough. The tradeoff is scheduling. Security.org notes that professional installs usually come with an arrival window, not an exact time.
Easiest to do yourself: SimpliSafe, by most accounts. Security.org and SafeHome both describe quick adhesive-and-app setups, with the only wiring being the Video Doorbell Pro. One practical tip from Security.org: adhesive mounts can loosen over time, so use the included screws if you plan to stay put.
ADT Blu is ADT’s self-install answer. ADT says no heavy tools are needed, and the starter kit includes adhesive tape for sensors.
Which System Offers Better Monitoring?
Both operate their own U.S. monitoring centers. ADT says it runs six company-operated centers and describes them as redundant, and its own comparison chart lists SimpliSafe with one. In Security.org’s testing, as summarized in our guide to other home security system alternatives, ADT’s average alarm response was 28 seconds and SimpliSafe’s was 31 seconds. We did not re-run those tests, and the gap is small.
What differs is the approach:
- ADT emphasizes verification. Its Alarm Messenger texting tool lets you confirm or cancel an alarm, and ADT says it has prevented more than 10 million false dispatches. Video verification needs Nest cameras and the Complete tier.
- SimpliSafe emphasizes intervention. Higher tiers let agents see and speak through cameras. SafeHome and SimpliSafe both claim fast agent response in these cases.
Neither company can guarantee police response times or outcomes. Dispatch ultimately depends on local emergency services. ADT also offers a $500 theft protection guarantee toward an insurance deductible, subject to its contract terms, and Home Security Radar reports SimpliSafe’s similar guarantee requires an Active Guard plan.
Backup power and connectivity. ADT says its base and sensors have 24-hour battery backup and that alarm events can go out over cellular if Wi-Fi is down. On ADT Blu, cellular backup is only included with Pro-Protect. SimpliSafe says cellular backup comes with professional monitoring plans. A limitation to know: cameras and camera-based features depend on Wi-Fi, and ADT says its Nest cameras store about an hour of footage locally during an outage. If you rely on a self-monitored setup, a Wi-Fi outage can stop phone alerts, so a free tier is not a substitute for backup.
SimpliSafe vs ADT: Pros and Cons
SimpliSafe
| Pros | Cons |
|---|---|
| Entry professional monitoring is about half ADT Pro Install’s published floor | Higher-tier features (Intruder Intervention, outdoor protection, video verification) need pricier plans |
| No contract and no cancellation fee, so you can pause or leave | Equipment is bought up front instead of bundled into a plan |
| Free self-monitoring tier lets you start cheap and upgrade later | Smart-home integrations are narrower than ADT’s |
| Gear moves with you; renter-friendly adhesive mounts | Technician setup, if you want it, costs extra and is arranged separately |
| 60-day return window with free return shipping | Not the best fit for a complicated, wired, or very large layout |
ADT (Pro Install and Blu)
| Pros | Cons |
|---|---|
| Technician designs, installs, tests, and teaches you the system | Pro Install monitoring is pricier and tier prices are quote-based |
| Deep Google Nest integration and a broad device catalog | 36-month plans and early-cancel fees on promotional bundles |
| Six-month money-back guarantee on Pro Install, though it has conditions | No self-monitoring option listed on Pro Install |
| ADT Blu gives you ADT monitoring with DIY setup and no contract | ADT Blu cellular backup requires the top monitoring plan; Blu and Pro Install are not interchangeable |
Which Is Better for Renters and Homeowners?
- Renters: SimpliSafe, or ADT Blu if you prefer ADT. Both are adhesive-friendly, owned by you, and month-to-month. A multi-year Pro Install plan can outlast a lease.
- Homeowners staying put: either works. If you want a technician and Nest cameras, ADT Pro Install fits. If you want lower monitoring costs and no lock-in, SimpliSafe fits.
- Large homes: a professional site assessment is valuable when layouts are complex. SafeWise favors ADT here. A planned DIY build can also work if you use enough sensors and have good Wi-Fi coverage.
- Budget-conscious buyers: SimpliSafe Starter with Standard monitoring, or a free tier if you can reliably respond to alerts yourself.
- People who want hands-off installation: ADT Pro Install, as long as you are comfortable with the contract terms.
Who Should Choose SimpliSafe?
Choose SimpliSafe if you want no contract, lower entry monitoring costs, DIY installation, a portable system, and the option to start with self-monitoring and upgrade later. It is also the better fit if active outdoor monitoring appeals to you. Read our SimpliSafe review for plan-by-plan detail.
Who Should Choose ADT?
Choose ADT Pro Install if you value a technician, a single accountable company, Google Nest cameras, and a larger device catalog, and you can commit to a long monitoring plan. Choose ADT Blu if you want ADT monitoring with DIY setup and no contract, and check that the cellular backup you need is on the plan you pick.
Final Verdict: SimpliSafe or ADT?
SimpliSafe wins for most buyers on flexibility and monitoring cost. Security.org and SafeWise reached the same conclusion, while SafeHome picked ADT, so reasonable experts differ. The decision comes down to what you value.
| If you care most about… | Pick |
|---|---|
| Lowest cost and no lock-in | SimpliSafe |
| Hands-off installation | ADT Pro Install |
| ADT monitoring without a technician or contract | ADT Blu |
| Google Nest cameras and smart-home automation | ADT Pro Install |
| Renting or moving soon | SimpliSafe or ADT Blu |
| Starting free and upgrading later | SimpliSafe |
A 60-second checklist before you buy: decide who installs, decide who responds to alarms, get the contract length and cancellation fee in writing, confirm cellular backup is on your plan, and compare the three-year total, not the sticker price.
Frequently Asked Questions
Is SimpliSafe cheaper than ADT? Usually, on monitoring. SimpliSafe’s paid plans start at $22.99 a month, while ADT’s monitoring page says Pro Install starts at $49.99. ADT Blu’s Pro-Protect plan ($24.99 without cameras) is close to SimpliSafe. Promotions can change the math, so compare three-year totals.
Does ADT require a contract? For Pro Install promotions, ADT’s pages reference a 36-month monitoring plan with early cancel fees. ADT Blu has no long-term contract. Some third-party sources say a Pro Install contract can be avoided by paying for equipment upfront. Confirm that in writing.
Can I install ADT myself? Yes, through ADT Blu (older ADT pages call ADT’s DIY line Self Setup). It is a separate product with its own equipment, so it is not interchangeable with Pro Install gear.
Can I install SimpliSafe myself and still get professional monitoring? Yes. Installation and monitoring are separate choices, and SimpliSafe’s professional monitoring is available whether you install the system yourself or pay for technician setup.
Does SimpliSafe work without a monitoring plan? Partly. SimpliSafe has a free tier and a roughly $9.99 self-monitoring tier with camera recordings. Neither includes professional dispatch, and cellular backup comes with professional monitoring plans.
What happens if the internet or power goes out? ADT says its base and sensors run on 24-hour battery backup, and alarm events can be sent over cellular if Wi-Fi is down. SimpliSafe says cellular backup comes with professional monitoring. Cameras and camera features generally need Wi-Fi.
Which is better for renters? SimpliSafe or ADT Blu. Both avoid drilling for most sensors, stay yours when you move, and avoid long contracts. Check your lease before mounting anything permanently.
Which has better professional monitoring? It depends on what you value. ADT stresses verification and a large company-operated network. SimpliSafe stresses live-agent intervention on higher tiers. Security.org’s testing showed similar average response times (28 seconds for ADT, 31 for SimpliSafe), but no provider can guarantee emergency response.
What happens if I move? SimpliSafe is designed to be repacked and reinstalled, and Security.org says the company sends a mover’s kit. ADT offers a relocation service for Pro Install, but you generally need to arrange a new installation, and plan obligations carry over.
Is there a money-back guarantee? SimpliSafe offers 60 days with free return shipping. ADT offers six months on Pro Install after it has tried to fix a system issue, and it requires both a service plan and monitoring payments to qualify. ADT Blu offers free returns within 30 days.
