TeamCity vs Upsource: What are the differences?

# Introduction
This Markdown code outlines the key differences between TeamCity and Upsource.

1. **Integration with CI/CD pipelines**: TeamCity is primarily a Continuous Integration/Continuous Deployment (CI/CD) tool, while Upsource is a code review and collaboration tool integrated with version control systems. 
2. **Feature focus**: TeamCity focuses on automating the build process, running tests, and deploying applications, while Upsource focuses on code review, searching codebases, and providing insights into code quality.
3. **User roles**: TeamCity is typically used by developers, QA engineers, and DevOps teams for build automation, while Upsource is mainly used by developers for code reviews, collaboration, and knowledge sharing.
4. **Support for multiple version control systems**: TeamCity supports various version control systems such as Git, Mercurial, Subversion, and Perforce, while Upsource provides advanced integration with Git and Mercurial repositories.
5. **Code analysis and insights**: Upsource offers advanced code analysis features like code intelligence, code search, and code-related discussions, while TeamCity focuses more on the build and deployment process without extensive code analysis tools.
6. **Deployment monitoring and management**: TeamCity provides detailed insights into the deployment process through build logs, artifacts, and notifications, whereas Upsource does not include deployment monitoring capabilities.

In Summary, TeamCity and Upsource differ in their core functionalities, user focus, code analysis capabilities, and integration with CI/CD pipelines.