The top car alarm systems, as of 2015, are Viper, Python and Avital systems, according to Top Ten Reviews. The Viper system scored a 10 out of 10 rating, while the Python system rated 9.5. The Avital system came in third with a rating of 8.8.
The Viper alarm system includes a wide array of features, including starter kill, shock sensors and phone integration for alerts. The Python alarm system provides a remote start feature on top of the alarm features, but does not include phone integration. The Avital system has similar features to the Python alarm system, but it lacks a silent feature.