Castle - The easiest way to protect your users from getting hacked
Callblock - The first app to block telemarketers automatically in iOS
Mail Dump - Powerful Extensions for email addresses extracting, verifying and finding
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
SpoofCard - Disguise your Caller ID
Antideo - Email, IP address and phone number validation API service