What are some of the competitors in this space?

- Gitpod, a SaaS competitor to Codespaces. http://gitpod.io

- Coder, which I guess is the more enterprisey self-hosted Codespaces alternative? https://coder.com

- This project, Devpod, seems to be a polished experience but not centralized like Coder.

- I recently stumbled upon Recode, which looks like a more indie take on the problem. https://github.com/recode-sh/cli

It's a lot older but I would say Vagrant intersects with this space

https://github.com/hashicorp/vagrant

Possibly devenv, as well.. Though I haven't personally tried it

https://devenv.sh/