According to their mission statement, Couch Surfing
"seeks to internationally network people and places, create educational exchanges, raise collective consciousness, spread tolerance and facilitate cultural understanding."

As such, this unique online community not only offers members a way to find a place to crash, it also gives them a chance to make new friends in the host cities or countries. The website has a verification system, as well as a community forum where you can get to know members before offering them a place to stay or staying on their couch. They also offer a page dedicated to safety guidelines.