[DocSavage]

That looks very interesting, particularly the UI layer for collaboration. Your website says it supports “massive data sets” but I would spell out what you mean since data for different fields vary by several orders of magnitude. (Massive for me starts at TBs and goes to petabytes.)

One of the issues for me is file-based versioning, which then requires the means to parse the format. A number of ventures and organizations (e.g., NeuroData without Borders) address versioning of the entire ecosystem necessary to correctly use the underlying data files, so not sure if that’s an explicit part of your ecosystem. Most importantly, is your stack going to be open source?