GitHub

GitHub hosts code repositories that use the Git version control system. Tom Preston-Werner, Chris Wanstrath, PJ Hyett and Scott Chacon founded it in 2008. Microsoft bought it in 2018.

Developers store projects on GitHub, propose changes through pull requests and review each other's work. Issues track bugs and tasks, and Actions runs automated builds and tests. Open source projects use the platform to take contributions from people around the world.

GitHub Copilot, launched in 2021, suggests code inside editors and runs on models from OpenAI and other providers. Other features include Pages for static websites, Codespaces for cloud development environments and security scanning for dependencies. The company is based in San Francisco and works largely with remote staff. GitHub hosts the code for much of the open source world, including many of the most widely used programming tools. Its Octocat mascot is well known among developers. The company runs a yearly conference called GitHub Universe and offers a free tier for individuals and open source projects.