SimpliSafe works without a subscription, but what it does depends on whether you pay
SimpliSafe's system functions in two modes: self-monitored (no subscription) and professionally monitored (with subscription). If you do not pay for monitoring, your system still detects motion and door/window openings, sends alerts to your phone, and sounds a loud siren when triggered. You control everything through the SimpliSafe app. The catch is that nobody is watching your system 24/7 — if an alarm sounds while you are asleep or away, you have to call 911 yourself.
If you add professional monitoring, SimpliSafe's dispatch center watches your system around the clock. When an alarm triggers, they attempt to contact you, then dispatch police if you confirm a break-in or do not answer. This is the subscription part, and it costs money monthly. Many people choose monitoring because they want someone else to handle the 911 call, especially at night or when they cannot reach a phone quickly.
Key Takeaways
- SimpliSafe hardware works without any subscription — sensors detect motion and door openings, and you get phone alerts and a loud siren.
- Professional monitoring is optional and costs roughly $15 to $28 per month depending on your plan, but it is not required to use the system.
- Without monitoring, you must call 911 yourself when an alarm sounds; with monitoring, SimpliSafe's dispatch center handles the call.
- The self-monitored option makes sense if you are home most of the time or want a low-cost deterrent; monitoring makes sense if you want 24/7 response.
What the self-monitored system actually does
When you buy SimpliSafe without a subscription, you get the hardware: door and window sensors, a motion detector, a keypad, and a base station that connects to your Wi-Fi. These pieces talk to each other wirelessly. When someone opens a door or window, or when motion is detected, the base station triggers a loud alarm (around 105 decibels) and sends an alert to your phone through the SimpliSafe app.
You can arm and disarm the system from the app or the keypad. You can also set it to "home" mode, which monitors doors and windows but ignores motion inside (useful when you are home but want perimeter protection). The system logs every sensor trigger, so you can see a history of activity. This mode costs nothing beyond the initial hardware purchase — no monthly fees, no contracts, no hidden charges.
The limitation is that the system does not contact anyone for you. If an alarm sounds at 2 a.m. while you are asleep, your phone alerts you, but SimpliSafe does not call the police. You have to wake up, check the app, and decide whether to call 911. If you are traveling or your phone is on silent, you might not know an alarm went off until hours later.
What professional monitoring adds
SimpliSafe's professional monitoring service costs between $15 and $28 per month, depending on which plan you choose. The most common plan is around $24.99 per month. When you subscribe, SimpliSafe's dispatch center in the United States monitors your system 24/7. The moment an alarm triggers, their system logs it and a dispatcher attempts to call you at the phone number you provided.
If you answer and confirm there is a break-in, the dispatcher calls 911 when ready and gives police your address and the nature of the alarm. If you do not answer, most plans allow the dispatcher to call a trusted contact (a family member or neighbor) to check on your home. If nobody answers or confirms it is a false alarm, the dispatcher still has the option to call police, depending on your plan settings. This means someone is taking action even if you cannot reach a phone.
The monitoring service also includes a backup cellular connection. If your internet goes down, the base station can still communicate with SimpliSafe's servers using a cellular signal, so your system keeps working. This is valuable because many burglars cut internet or power lines before breaking in.
Comparing the two modes side by side
| Feature | Self-Monitored (No Subscription) | Professional Monitoring (Subscription) |
|---|---|---|
| Sensors detect motion and door/window openings | Yes | Yes |
| Phone alerts when alarm triggers | Yes | Yes |
| Loud siren sounds | Yes | Yes |
| Dispatcher calls you when alarm sounds | No | Yes |
| Dispatcher calls 911 on your behalf | No | Yes |
| Cellular backup if internet fails | No | Yes |
| Monthly cost | $0 | $15–$28 |
When you might skip the subscription
Self-monitored SimpliSafe makes sense if you are home most of the time and can respond to an alarm yourself. The loud siren is a genuine deterrent — most burglars want to avoid noise and attention, so they move on when an alarm sounds. If you live in a neighborhood with active neighbors or nearby police, the siren alone may be enough to stop a break-in before it happens.
The self-monitored option also works well as a second layer of security. If you already have a security system with professional monitoring elsewhere, or if you are using SimpliSafe only to monitor a vacation home you check on regularly, the subscription may be redundant. Some people use it as a motion-alert system for a garage or shed, where they just want to know if someone is moving around inside.
The cost difference is significant over time. A year of professional monitoring costs $180 to $336. If you are on a tight budget and can live with the responsibility of calling 911 yourself, the self-monitored system is a real option, not a crippled version.
When professional monitoring makes practical sense
Professional monitoring is worth the cost if you travel frequently or work long hours away from home. When you are asleep or in a meeting, a dispatcher is still watching. If an alarm sounds, they take action when ready — you do not have to wake up, check your phone, and make a decision at 3 a.m. This is especially valuable if you live alone or if your home is in an area where police response is slow.
Monitoring also matters if you have elderly relatives living with you or if you have children home alone. A dispatcher can call a trusted contact if you do not answer, and that contact can check on the house or call you. This creates a safety net beyond what you can manage yourself.
The cellular backup is another practical reason. If a burglar cuts your internet line, your self-monitored system stops communicating with you. With professional monitoring, the system keeps talking to SimpliSafe's servers over cellular, so the alarm still triggers and the dispatcher still gets notified. This is not a theoretical risk — it happens.
How to decide between the two
Start by asking whether you can reliably respond to an alarm. If you sleep deeply, travel unpredictably, or work in a job where you cannot answer your phone, professional monitoring is the safer choice. If you are home most evenings and weekends, or if you are only protecting a secondary space, self-monitored is reasonable.
Consider your neighborhood and local police response times. If police typically arrive within five minutes, the siren alone may deter most break-ins. If response times are longer or your area has higher crime, a dispatcher calling 911 when ready gives you a real advantage.
Think about the cost in context. $25 per month is roughly the price of two coffee subscriptions. If that fits your budget and you want the peace of mind of 24/7 monitoring, it is worth it. If you are building a system on a tight budget, start with self-monitored and add monitoring later if you find you need it.
Frequently Asked Questions
Can I switch between self-monitored and professional monitoring?
Yes. You can start with self-monitored, use it for a few months, and then add professional monitoring whenever you want. You can also cancel monitoring and go back to self-monitored. SimpliSafe does not lock you into a long-term contract — you can cancel monitoring month to month. The hardware works either way.
What happens if I have professional monitoring but do not answer when the dispatcher calls?
The dispatcher will attempt to call a secondary contact you have listed (a family member, neighbor, or friend). If that person answers and confirms it is a false alarm, the dispatcher cancels the police dispatch. If nobody answers or confirms a break-in, the dispatcher can call 911 based on your plan settings. You control how aggressive this is when you set up your account.
Does SimpliSafe charge extra if the police respond to a false alarm?
SimpliSafe itself does not charge you extra for false alarms. However, some cities and counties charge homeowners a fee if police respond to multiple false alarms at the same address in a year. This is a local government fee, not a SimpliSafe fee. Check your city or county's false alarm policy before you set up the system.
Will SimpliSafe work if my internet is down but I do not have professional monitoring?
No. Without professional monitoring, the system relies on your Wi-Fi to send alerts to your phone and to log activity. If your internet is down, the sensors still work and the siren still sounds, but you will not get phone alerts and SimpliSafe will not have a record of the alarm. With professional monitoring, the cellular backup keeps the system connected to SimpliSafe's servers even if your internet fails.
Can I use SimpliSafe with a landline instead of a cell phone?
SimpliSafe's app-based alerts work only with a smartphone. If you want to use a landline, you need professional monitoring — the dispatcher can call your landline when an alarm triggers. Without monitoring, you need a smartphone to receive alerts and control the system remotely.