What are some alternatives?
When comparing TelephoneLists.Biz and Gilbert Data Base, you can also consider the following products
Salestools - Monitor your Linkedin newsfeed for keywords to obtain leads.
Lead411 - Lead411 provides company intel, contact email address, direct phone numbers and a sales cadence tool.
Statlistics - Statlistics is a list management and brokerage firm specializing in business and consumer list solutions.
All The Leads - All The Leads offers probate lead lists for real estate agents and investors.
MixRank - MixRank is a customer discovery platform that helps sales teams automate lead prospecting and find new customers.
MegaLeads - MegaLeads helps businesses reach out to their customer base and prospects by utilizing digital marketing and quality sales leads.