CoSketch vs Zulip

CoSketch

Education & Reference

CoSketch is a free online whiteboard tool for collaborating on drawings, diagrams and sketches in real-time. It allows multiple people to visually brainstorm together with virtual sticky notes, shapes, diagrams, handwriting/drawing, and uploading images.

Zulip

Social & Communications

Zulip is an open-source team chat software that focuses on threaded conversations to improve productivity and organization. It has features like public/private streams, emoji reactions, integrations, and customizable notifications.