Case Study: ClassDojo achieves real-time, scalable classroom behavior management with PubNub

ClassDojo Builds Virtual Classroom Management Tool Using PubNub

ClassDojo is a virtual classroom management tool that helps teachers spend less time policing behavior and more time teaching by giving students real‑time points for good or bad behavior. The company needed reliable, instant communication across web and mobile in classrooms with old networks, outdated browsers, proxies and firewalls — conditions that caused their initial WebSocket approach to fail for roughly half of users — and faced a build‑vs‑buy decision about scaling real‑time infrastructure for tens of thousands of users.

ClassDojo integrated PubNub’s Real‑Time Network, using long polling plus PubNub Data Streams, Presence and Multiplexing to ensure cross‑network compatibility, global redundancy and easy cross‑platform implementation. The result: seamless, low‑maintenance real‑time delivery (over a billion feedback popups sent), support for hundreds of thousands of concurrent connections, and the ability for the small ClassDojo team to focus on product features instead of building and operating real‑time infrastructure.

ClassDojo

Liam Don

Co-founder and CTO