What are some alternatives?
All The Leads - All The Leads offers probate lead lists for real estate agents and investors.
Spaceship - Do you like pushing buttons and shouting at your friends? Do you like discharging Clip-jawed Fluxtrunions? If you answered yes, or no, then you might have what it takes to be on a Spaceteam.
Exact Data - Exact Data offers mailing and lead lists services.
Lead411 - Lead411 provides company intel, contact email address, direct phone numbers and a sales cadence tool.
LeadWave - LeadWave offers lists of SaaS companies with validated emails.
LeadFuze - B2B Lead Generation & Sales Prospecting Software.