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Wyze Home Monitoring is a standout due to its affordable cost. You’ll need a $30 Wyze Sense Hub to start, or you can pay $100 for a year of professional monitoring and get it for free. Or you can pay $10 each month, but you don’t get the Hub for free. From there, you can add keypads, entry sensors, motion detectors and more to build the system that works best for your home. The only real drawback: Wyze doesn’t have cellular backup in case of power or internet outages.

There is also a five-piece Core Kit available for around $80 on Amazon. A monitoring subscription is required, but the kit includes three free months.