ClassDojo

ClassDojo is a communication platform for schools. Founded in 2011 by Sam Chaudhary and Liam Don, who left their native England to start the company in a one-bedroom apartment in San Francisco, it connects teachers, students, and families through photos, videos, messages, and activities. The product began as a simple tool for behaviour tracking and evolved into a global community platform. Its stated premise is that the gap between home and school was harming children.

For engineers, the scale of the product is the notable feature. ClassDojo is used in 95% of U.S. schools and in 180 countries, with roughly 50 million teachers and families on the platform and more than 51 million children reached each day. Technical work spans mobile app development, real-time messaging, photo and video sharing, and automatic machine translation into over 190 languages. The translation layer is central to the company's emphasis on inclusivity and accessibility across that user base.

The company describes its development process as deeply customer-centric, with the product shaped by thousands of conversations with educators and a conviction in listening closely to those doing the work in classrooms. ClassDojo operates in the education and K-12 verticals and is headquartered in San Francisco, with roots in the United Kingdom and a user base spanning 180 countries.