As far as I can tell the open source version (which hasn't had any updates other than readme changes since earlier this year) is basically on life support. They have no plans to make the new hosted version open source, and only vague plans on hire a contractor in the future to keep the open source version alive. According to the cofounder I spoke with they went back and force about this half a dozen times, which is why their messaging has been so mixed- they had originally said in previous HN and twitter threads that they would open source the new version, but went back on that because they were worried it would take money from their hosted version.