Kapta - Key account management software

Demandbase - Bizo

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

Metadata - Metadata automates account based demand generation for B2B companies using AI, data enrichment, & targeted advertising.

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

6sense - 6sense is a B2B predictive intelligence engine for marketing and sales.