TIO looks great. However, it's probably serving different purposes than Repl.it, here are some differences as I see them: - repl.it is interactive, which means

TIO looks great. However, it's probably serving different purposes than Repl.it, here are some differences as I see them: - repl.it is interactive, which means that not only a process and a container is booted up that stays with you the whole session time but also means that the program state is saved when you're executing code from the repl console. This enabled interactive games like text games and cli programs. - support for multiple file with realtime file update. You can plot something for example: https://repl.it/site/blog/file-updates https://repl.it/site/blog/file-updates - support for third party modules starting with pipy and npm (you can import any module from those registries). There are many other small features that's worth checking out. But to sum up, Repl.it is not just trying to be a code execution service but an actual programming environment.