I can help to extract information using Linkedin, Crunchbase, Manta, Rocketsearch, dandb, thatsthem, Yellowpages(membership acquired) and google to extract the relevant information with verification.
Depending upon the data, I will be able to provide 250 leads per day and generally it costs $0.13/day (negotiable) which is way cheaper than zen prospect.
I have a good set of automated tools to extract websites, name,phone,email, bulk company profiles, social links and social likes. I have been working with companies like Leagueappa, Voray and Biz Advance for the same profile.
I would appreciate if you specify the type of sample you need to understand my competency. Looking forward to work with you