Cocalc

SageMath Inc. is a software company that creates and maintains https://cocalc.com.

CoCalc (formerly SageMathCloud) is a web-based cloud computing (SaaS) service for research and teaching computational science. Part of the Sage project, it supports editing Sage worksheets, LaTeX documents, and Jupyter notebooks. CoCalc runs an Ubuntu Linux environment that can be interacted with through a terminal, additionally giving access to most of Linux’s capabilities.

It also provides infrastructure and services for running courses based on Jupyter Notebooks. Over 3 million accounts have been created since CoCalc’s inception in 2014 and is used worldwide.