CLASSUM, a South Korean startup, is offering a group communication tool that seeks to address the communication and onboarding issues that many companies face.

Its service is a hybrid of productivity tools Slack, Notion, and Google Drive, offering users an easy-to-use platform to upload files, share links, and communicate with one another.

Originally developed as a classroom chatroom service, CLASSUM now offers HR training programs and communication tools for businesses. Its B2B business has become the major revenue source, accounting for more than half of its annual sales.

CLASSUM's approach is to make communicating at work as fun as using social media like Instagram, where participants can ask questions at any time, and the organizer can run quizzes to assess understanding.

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1. Summary

2. Spilling the Tea

3. CLASSUM brings Instagram-like productivity tool to biz world

4. Before you go