Clearbit - Clearbit provides Business Intelligence APIs
6sense - 6sense is a B2B predictive intelligence engine for marketing and sales.
Memotoo - Memotoo allows you to sync your data (contacts, calendar, tasks, .) with phones (iPhone, Android, Samsung, ..
Metadata - Metadata automates account based demand generation for B2B companies using AI, data enrichment, & targeted advertising.
Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
Triblio - Triblio is an account-based marketing software that enables marketers to personalize multichannel campaigns to reach their target audience.