Approximately $100 - $150 USD per device (one-time purchase, not annual). This is a perpetual license.
If you just need a powerful dashboard to monitor cameras live, NX Witness is free . If you need a reliable, professional-grade NVR for security footage, you should budget for a one-time per-camera fee . nx witness license price free
For 16 cameras → ~$1,500 one-time + ~$300/year optional maintenance. Approximately $100 - $150 USD per device (one-time
: The software itself is free to download and use for live streaming, allowing you to connect and view an unlimited number of cameras at no charge. professional-grade NVR for security footage