DIY security systems either start with a focus on security itself, or start as home automation product with an add on security functionality. Each company tends to have a unique pitch, so scrolling through their product listing will help give you a sense of which one will be best for you.
SimpliSafe has a broad line up of sensors and security features, but no cameras. Being able to “look in” via a camera when a sensor is triggered is incredibly useful, as otherwise if you are traveling, it is hard to know how panicked to be about an alert. I also like that SimpliSafe uses Lithium Ion batteries for its sensors, giving them an estimated five-year lifespan.
Read more: http://www.extremetech.com/computing/232577-securing-your-home-getting-started