People Search
Phones, Emails, Addresses, Background check, Web references
All public info
Like other search engines (Google or Bing) Radaris collects information from public sources.
Linkedin
Peopleware (Privately Held; Information Technology and Services industry): Developer, (September 2010-Present) .NET 4.0, Visual Studio 2010, WPF, LLBLGen Pro, Firebird, Subversion
...