FollowUp.cc is a Gmail plugin that helps salespeople close more deals, build deeper relationships, and save more time with open tracking, send later, reminders and more. The Starter package costs $25 per user per month, and includes basic features like reminders, auto follow-ups, response detection, a calendar feed and Google Calendar integration, attachment support, as well as some Chrome extension features like send later and email snoozing. The Enterprise Sales package includes Dropbox integration, Evernote integration, Google Drive integration, open tracking, adding emails to CRM, Gmail sidebar for Salesforce, quick add & edit SF records within Gmail, Sales Team Reports, summary emails, team demos, and email and phone support. Although optimized for Gmail, FollowUp can also work with Apple Mail, Microsoft Outlook, Hotmail, Yahoo, and AOL, in addition to mobile devices.