#8 of 10 Top Startup CRM Applications of 2015 - Brief Description of the Best Startup CRM: Nutshell CRM Headquartered in Ann Arbor, MI, Nutshell CRM integrates with Google Apps, Zendesk, Olark, Wufoo, and MailChimp. The team of professionals at Nutshell CRM believe that creating unique software is what makes companies succeed. Nutshell CRM understands that CRM is not comprised of a single application, but it should be used as a repository for a businesses data. The talented team of professionals work diligently to build software that is easy to use and accessible to anyone.