Cirrus Insight is a plugin that syncs emails, appointments, and contacts between Gmail, Outlook, and Salesforce to keep CRM information up to date. It was founded in 2011 and has grown rapidly, ranking #41 on the Inc. 5000 list and now having over 5,000 customers. Cirrus Insight integrates with multiple platforms and has processed over 2.5 billion transactions with Salesforce to sync information and track activities like email opens.