What are some alternatives?
Elucify - A completely free software tool that uses crowdsourced data to find business email addresses
Bitly - Get the most out of your social and online marketing efforts. Own, understand and activate your best audience through the power of the link with Bitly Enterprise.
KiteDesk - Use KiteDesk sales prospecting software to generate leads from our premium data marketplace. Then reach prospects and build a sales pipeline with organized Lead Lists. Syncs direct with CRM too!
HubSpot Marketing Free - Free lead capture and marketing tools.
BuiltWith - Find out the technology behind websites
Lead Forensics - B2B website analytics and lead generation.