Let's do em all!:

• GitHub: most mature/reliable
• GitLab: the most popular and mature GitHub alternative
• Bitbucket: the "third party" of the bunch that's no better than the first
• GitTea: the "fourth party" that's actually cool but kinda not quite there yet
• Gogs: great, but you need to self-host. GitTea is just a community hosted fork of Gogs
• SourceForge: wow, they're still around?
• Codeberg: centered around open-source projects only. Managed by a non-profit org
• Launchpad: run by Canonical (Ubuntu), has a lot of other features/goals than just hosting code
• GitBucket: a self-hostable GitHub clone written in Scala
• NotABug: another "liberated" version of Gogs
• Radicle: imo, the only other one worth looking at in this list besides GitHub and GitLab. It's unique in that it's build on p2p technologies and is censorship resistant

Would love to see other people's one-liner blurbs on these as well