Lead411 provides comprehensive and accurate information about contacts and companies available in the marketplace. They have over 450M contacts, within 20M companies worldwide. Through targeted filters, and sales intelligence data points, customers are able to view complete contact data profiles and find growing companies that are more likely to be in a buying cycle for adding services/solutions.
Their CRM integration is seamless, and this makes a huge difference if you are regularly importing leads.
UpLead is a B2B prospecting platform that provides B2B contact & company data. Features include real-time email verification, contacts in over 200 countries, 50+ search criteria, technology tracking, account based marketing, competitor intelligence, email pattern intelligence, social profile links, Salesforce & 12 other CRM integrations, and a robust API.
We like the intuitive user interface, and it's also nice how they flag contacts that are potentially not up-to-date, so you don't waste your credits!