Vivint’s equipment can be paid for in full at the time of purchase, and its professional monitoring services are paid on a month-to-month basis. Note: If you choose to finance your home security system with a 42–60-month financing agreement, you could be locked into a payment contract that’s very difficult to get out of.
If you don’t have enough money to pay for your equipment up-front and want to avoid long-term contracts and agreements, consider another provider (like SimpliSafe or Frontpoint) that offers more affordable options.