As per Embedly's blog post announcing the acquisition:
Today, the Embedly team is excited to announce that we’ll be joining the Medium family!
Medium and Embedly both believe in the power of online publishing and making it simple for people to share their stories. We’re dedicated to the success of all publishers on the web and we want to contribute to their future. Our shared mission is making media consumption and publishing hassle-free, so publishers of any size can focus on their editorial pieces. So we’re excited to help supercharge that promise together, creating world-class in-house capabilities that will bring the very best in multimedia embedding technology to all writers and publishers on Medium... READ MORE