RocketReach

The RocketReach API allows you retrieve rich contact info and social data for people and companies. The RocketReach API can retrieve peoples' personal and professional contact information - including email address, phone numbers, and profile information - from social websites such as LinkedIn, Twitter, Facebook, Angel.co, and Crunchbase. Users can search for people by name, title, company, location, profile keyword, or Linkedin URL. RocketReach has information on over 250 million people and is constantly crawling the web in order to add more individuals and to keep information up-to-date.