123People is part of the French Yellow Pages Group. It is, therefore, particularly strong at finding people in Europe. The following countries are very well represented by this search engine: Austria, France, Germany, Italy, Netherlands, Poland, Spain, Sweden, Switzerland and the United Kingdom. Canada and the United States are also well covered.
Similar to Pipl, 123People lays out the search results by category. Unlike Pipl, however, 123People is not as good as eliminating duplicate content, so you may have to do a bit more digging on this site. Nevertheless, some of the result categories are useful and unique to 123People. For example, there is a category called Amazon (for anyone who ever left a comment on Amazon’s website). There are categories for phone numbers, email addresses, domain names, professional associations, blogs, biographies, etc.
One thing to note about 123People is that it does mix free information with paid content. Sometimes this is done in a confusing manner. For example, there is a category for premium public records and criminal record checks. Both of these categories cost money.