Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
One caveat: you cannot use Area 51 to create a private site. Even if you can get enough users, your site will be open for all on the Internet to see. Also, you will have a something.stackexchange.com URL in the beta and a TLD TBD in the potential "real" version, never a help.yourcompany.com URL.
