Movable Ink is a technology company that allows marketers to change emails after they have been sent out. The technology can change emails based on the moment of engagement, the user's current location, social cues, fast-moving inventory, and it works across all email clients. Movable Ink has been called "The Harry Potter of Email" because it includes parts of code into an email's HTML that makes the content come to life and update in real-time. 