Followup.cc - FollowUp for email is a lightweight productivity suite that keeps your conversations and tasks from slipping through the cracks. Set perfectly timed reminders that arrive at the top of your inbox, right when you need them.

Segment - We make customer data simple.

HubSpot CRM - Free CRM software for small businesses.

Stitch - Consolidate your customer and product data in minutes

Streak - Manage customers inside Gmail

Segment Sources - Load CRM, billing, and other cloud data to your Warehouse