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By very basic stuff you mean "Doing everything a cas can do". The expenses come when you want to connect it to the internet, because people started using the full linux distro you get as a botnet, and increasing performance.

CoCalc is an open source system. It is convenient to pay for a setup, which is how they hope to get revenue to pay developers.

We also provide a nice easy to install Docker image of Cocalc here: https://github.com/sagemathinc/cocalc-docker

wow, many times downvoted for redirecting people to an up to date situation so they can chose the plan best suited for they convenience. Gosh, HN is getting brutal. Btw, very nice job to the guys at CoCalc in general, as a collaboration tool, and specially at courses based on Jupyter Notebooks. EDIT: and now some guys going through my old posts in different threads giving me negative votes. Really?Wow.Just wow.

You don't have any other comments from the last 24 hours, so how are people supposed to be downvoting your old comments?