The best home security systems don’t come cheap, but it’s hard to put a price tag on feeling safe in your own home. While Vivint doesn’t offer any discounts to potential customers, it is possible to get credit by participating in its referral program. Simply recommend Vivint to a friend or colleague, and – as long as they keep the system installed for a set period – you can receive credit. Vivint also offers users professional installation with free activation to reduce up-front costs. On top of that, clients can choose to pay in installments for a 60-month period, completely interest free.