Nextjournal takes the notion of computational notebooks a step further, by bringing together:
collaboration - sharing and building on each other's work is as easy as one click. What's more, you can work on a notebook in real-time with your collaborators.
polyglot notebooks - you can use multiple languages seamlessly within the same notebook.
reproducibility - the code pertaining to each language runs inside environments that can be exported and re-used at any moment, not just within Nextjournal, but on any machine, saving you the hassle of constantly managing dependencies or installing the same packages over and over. Further, the technology underlying Nextjournal allows for built-in versioning of all components of your work, thus ensuring that it can always be reproduced.