I've had success with MotionEyeOS [0] on a Raspberry Pi. It used to be that a Pi ($35) plus the camera module ($25) meant ~$60 per cam but now that the Zero W

I've had success with MotionEyeOS [0] on a Raspberry Pi. It used to be that a Pi ($35) plus the camera module ($25) meant ~$60 per cam but now that the Zero W [1] is out you can do Pi ($10) plus camera module ($25) plus the nifty official case that nicely accommodates a camera ($5) for ~$40. MotionEye let's you store images or video locally on the Pi or has multiple cloud destinations available (Drive, Dropbox, your own custom FTP node). An email notification + dropping the files into Google Drive is stupid simple to set up. Plus you can configure just about everything from motion sensitivity to frame rate, etc. Most difficult setup is live stream which means you would need to VPN into your home network; certainly not impossible but still not turnkey simple. If there is a better open source solution for the Pi, I'd love to hear about it. [0] https://github.com/ccrisan/motioneyeos https://github.com/ccrisan/motioneyeos [1] http://www.canakit.com/raspberry-pi-zero-wireless.html http://www.canakit.com/raspberry-pi-zero-wireless.html