Hello, We don't currently have any metrics about the uptime but uptime hasn't been an issue when we have used it in classes at Vanderbilt or any of our studies/summer camps. NetsBlox is a fork of Snap! with its own backend support (message routing and such requires more backend support). If you are interested, the client code is available at https://github.com/NetsBlox/Snap--Build-Your-Own-Blocks and the rest is at https://github.com/NetsBlox/NetsBlox. There currently isn't a plan for a text-based equivalent. The codification features should be supported in NetsBlox since it is an extension of Snap!. However, we have been considering other platforms for deployment of NetsBlox projects (such as robotics platforms). If you decide that NetsBlox might be a good fit for your class and have any more questions feel free to either post them here or just email us directly! Although this platform is convenient, I respond faster to email :) Our contact email is akos.ledeczi@vanderbilt.edu and my email is brian.broll@vanderbilt.edu Brian