Any Dooqod.com alternatives for Jupiter Notebook

I found dooqod.com very convenient for keeping my Jupiter projects , the cool thing I like with Dooqod is that I can share the same env with anyone with a click of a button (like Google docs), also I can do a meeting right from the Dooqod workspace. But it costs 19$ month.

would love to hear about any free alternatives to Dooqod