SciFlow is an online editor for academics. They have recently updated and expanded the documentation, so should you ever get stuck, here’s how to. That said, the interface is pretty intuitive, so I’m not sure you’ll ever need to navigate to the support pages for basic editing.
There are some useful hints, though, like using zbib (Zotero) with Sciflow (instructions here). This gets pretty close to Authorea’s citation feature, and is also useful for collaborative texts (and doesn’t suffer from the slowness of direct Zotero/Mendeley connections if you have a large database of references).
The SciFlow team have also recently updated the Templates feature:
There are many journal styles to choose from. It’s not quite (yet) like typeset.io, but the social sciences are not well covered by typeset anyway. SciFlow offers some useful templates, but in most cases, it’s necessary to do some finishing before submitting to a journal. On the other hand, there’s a template for minutes — that’s useful for anyone working in a team, and who isn’t?
In most cases the generic templates will do, including the SciFlow templates which support many common citation styles.