CLASSUM Co., Ltd. is an up-and-coming interactive communication tool with which students and educators alike can enhance their learning and teaching experiences via posts, live sessions and chats. CLASSUM was created to address and overcome challenges faced by those in the academic community such as communication barriers between teachers and students, and a lack of interactivity both in and out of the classroom. Nicknamed as "Slack for Education," CLASSUM is currently available in English, Japanese, and Korean. The platform focuses on providing tools and integrations that help increase engagement for all types of learners.

Founded in 2018 by Chaerin Lee and Youjin Choi, two students from Korea Advanced Institute of Science and Technology (KAIST), CLASSUM has increased its revenue by 1835% in the past fiscal year (2019-2020). Founder and CEO Chaerin Lee was listed under the Forbes 30 Under 30 Asia Class of 2021. In April 2021, CLASSUM received Series A funding of $6 million by Pearl Abyss Capital and Storm Ventures along with pre-existing investors Big Basin Capital and Smilegate Investment.

CLASSUM is being used in 4,000 institutions across 23 countries. Partnering with Zoom, Gather, and soon with AWS, the service is on a fast track to become a truly global platform.

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