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99/mth?Visit Siteat SimpliSafeAffordable professional monitoringLimited smart home compatibilitySimpliSafe is one of the best DIY home security systems for professional monitoring, which costs around $15 a month. This is a lower price
than Scout and abode, though it lacks smartphone app controls. Unlike the competition, SimpliSafe uses a cellular connection for its primary connection, something that other systems only use as a backup. The company also offers a great selection of security and safety sensors. The system is easy to set up and comes
with a detailed instruction booklet. SimpliSafe's three year warranty is the best among DIY security systems, with most competitors only offering one year of coverage.