9
Brands Reviewed
1,200+
Hours Tested
5
Scoring Dimensions
2026
Data Updated

Best Home Security System After Canceling ADT (2026)

The right system after ADT depends on why you left and what you want next. ADT's professionally installed equipment doesn't transfer — you're starting fresh. That's actually an advantage: you can choose any system without compatibility constraints.

Here's a scenario-based breakdown to route you to the strongest match.

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Match your next system to your situation

I want no contract ever again

→ SimpliSafe or Cove

Both offer CSAA Five Diamond professional monitoring month-to-month. No ETF, no equipment financing, no auto-renewal. SimpliSafe leads on monitoring quality; Cove leads on monitoring cost.

I want professional installation again

→ Vivint

Vivint is the strongest professionally installed alternative — better cameras, deeper smart home integration, no monitoring contract (though equipment financing applies). Request quotes from both before deciding.

I'm in the Amazon ecosystem

→ Ring Alarm

Ring integrates natively with Alexa, Echo Show, and Amazon Key. Professional monitoring from $19.99/month, no contract, best-in-class doorbell cameras.

I have Z-Wave or HomeKit devices

→ Abode

The only major alarm system with native Z-Wave, Zigbee, and Apple HomeKit support simultaneously. On-demand monitoring available — pay only when needed.

I want the lowest possible monthly cost

→ Cove

Cove's professional monitoring starts at $17.99/month — the lowest among CSAA Five Diamond certified providers. Equipment from $199 purchased outright. No contract.

What to know about switching

ADT equipment doesn't transfer

ADT sensors, keypads, and panels are proprietary. Budget for full equipment replacement. SimpliSafe kits start at $229; Cove starter kits from $199.

Minimize coverage gap

Order your new system before canceling ADT. DIY systems (SimpliSafe, Ring, Cove) can be activated within 24 hours. Professionally installed systems (Vivint) need 1–2 week lead time for scheduling.

Time your ETF vs. waiting

If you have 3–4 months left on your ADT contract, waiting costs less than the ETF in almost all scenarios. Use our Cost Calculator to confirm your specific numbers.

Frequently asked questions

Will my ADT equipment work with another monitoring company? +
Most ADT professionally installed equipment uses ADT-proprietary hardware that cannot be reprogrammed to work with another monitoring provider. You'll typically need to purchase new equipment when switching systems. ADT+ self-setup equipment is also proprietary to the ADT app. Budget for equipment replacement as part of your switching decision.
Should I wait until my ADT contract expires before switching? +
If you're within 3–4 months of your contract end date, waiting is almost always the better financial decision. Your ETF may be $150–$300 in the final months — but waiting eliminates it entirely. Use that window to research, compare quotes, and select your next system, so you're ready to cancel ADT and activate your new system in the same week.
How soon after canceling ADT can I activate a new system? +
Immediately. There's no waiting period. SimpliSafe, Ring, and Cove can all be ordered and activated within 24–48 hours. If you're switching to a professionally installed system (Vivint, new ADT plan), schedule installation in advance so there's minimal coverage gap.
Can I use SimpliSafe in a home that had ADT installed? +
Yes. ADT sensors and keypads installed by ADT are not reused, but SimpliSafe components are standalone — you'll add new door/window sensors, motion detectors, and a new base station. Most ADT-installed sensor locations are the same ones you'd want for a new system, so repositioning is minimal.
What if I want professional installation at my next system? +
Vivint is the strongest professionally-installed alternative to ADT. Vivint's camera quality and smart home integration significantly exceed ADT's equivalent tiers. Note that Vivint equipment financing creates a different type of financial commitment than ADT's monitoring contract — see our Vivint financing guide before comparing quotes.

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