Plot.ly by default will tie in their social services and copy all of your data to other people's computers.

I raised this issue with the project maintainers and they stated that the wish of the parent company is for this to remain the default.

So, just a warning to enterprise developers, you have to fiddle with this to turn that off, but without a clear policy statement or a reasonable fork of the project that addresses the privacy and security issues, I've been advocating against use of Plot.ly.