Sentry is an open-source error tracking system that helps developers diagnose and fix issues in their code by providing detailed reports and context about errors occurring in production. It integrates seamlessly with numerous programming languages and frameworks, allowing for easy implementation and customization.
GitLab is a web-based Git repository manager that allows teams to manage source code, automate CI/CD pipelines, and collaborate on code with merge requests. It provides a platform for continuous integration and deployment, along with issue tracking, code review, and repository management features.