GitHub is the world's largest code hosting platform and the default choice for UK engineering teams. It provides Git version control, CI/CD through GitHub Actions, code review via pull requests, project management with Issues and Projects, and GitHub Copilot for AI-assisted coding. The free tier includes unlimited public and private repositories with up to 2,000 CI/CD minutes per month. All data can be stored in EU regions, making it GDPR-compliant for UK businesses.