[vgrichina]

My current plan is to make runtime platform open-source, but sell hosted development tools as SaaS.

While software developers don't usually buy platform stuff like compilers, libraries etc – they are usually more than willing to buy products that make things simple. Otherwise companies like GitHub or (my own product – Hosted CI) won't get any revenue.

[chriscool]

Tell us when you make it open source. I would be happy to have a look and maybe help.