[sen]

I thought the website was pretty good at explaining it? (I don't own one or know much about it other than having heard about it a few times on HN before):

> openpilot is open source software built to improve upon the existing driver assistance in most new cars on the road today. Tesla Autopilot like functionality for your Toyota, Honda, and other top brands.

> While engaged, openpilot includes camera based driver monitoring that works both day and night to alert the driver when their eyes are not on the road ahead.

It's basically an open-source (software) version of Tesla Autopilot and the Comma is their hardware they're selling that's already set up and running the OSS.