From the Editorially blog:
Today brings some sad news: Editorially is closing its doors. The application will remain available until May 30, at which point the site will go offline. We encourage all users to export their data.
We’re proud of the team and tool that we built together and incredibly thankful that so many of you were willing to give it a try. And we continue to believe that evolving the way we collaborate as writers and editors is important work. But Editorially has failed to attract enough users to be sustainable, and we cannot honestly say we have reason to expect that to change.
The Editorially team did everything right with the wrong product. I hope we haven’t seen the last of them.