yeah, teddy and cas icly did a deep dive a month or so back because they're geeks - most of the alternatives require you to share your browser & ip and in the small print basically say they can look into your browser at any time once you accept their add-on. there's one coming out now called popcorn that's supposed to be like rabb.it in that the 'video screen' is part of the website rather than mirroring your browser/allowing others to see your computer screen/etc.