We’ve all seen the prices for professional home security DVR systems. They can get expensive fast. But if you have an old PC lying around and a few USB webcams or IP cameras, you can build your own professional-grade system for free using iSpy.

What is iSpy?

iSpy is an open-source video surveillance software that turns your computer into a powerful NVR (Network Video Recorder). We’ve used it for everything from basic porch monitoring to full-home security, and the flexibility is incredible for a free tool.

Setting It Up

First, download the Agent DVR (the modern version of iSpy) from their official site. Once installed, it runs as a local server on your PC. You can then add cameras by simply typing in their local network addresses or plugging in USB webcams directly.

Our Take: The best part about iSpy is the "Motion Detection" feature. You can drag boxes over the areas you want to watch (like your front door) and ignore areas where the wind might blow a tree branch, saving you from constant false alerts.

Why We Love It

Unlike many paid systems, iSpy doesn’t lock your footage behind a subscription. We store all our recordings locally on our own hard drives, which means we own the data and it’s always accessible, even if our internet goes down.