If you’re starting a new open source project, or open sourcing some existing code, you’ll need a publicly accessible location for the version control system holding your code (if you’re not planning on setting up a publicly accessible VCS, reconsider; no public source control is a red flag to potential contributors). You could set up your own repository hosting, but with so many companies and groups offering existing setups and services, why not use one of those and save yourself some time? Here’s an overview of some of the more popular options.