SigmaHub

Have you ever watched educational content on YouTube or Bilibili, only to realize the next day that you’ve forgotten almost everything? Passive video consumption is an extremely inefficient way to learn. SigmaHub is built to change that.

SigmaHub is an AI-powered learning companion that turns video watching into active learning. By automatically generating questions, summaries, and keyword clouds, SigmaHub helps learners engage with content more deeply and significantly improves knowledge retention — making video learning up to ten times more effective.