One reason TeamCity is dubbed an "Intelligent CI server" is its approach to integration. When we say we support a tool, we mean it in every way possible. For example, support for Visual Studio projects provides automatic detection of tool versions, testing frameworks support, code coverage, static code analysis, and more.
CLion will take care of the routine while you focus on the important things. Knowing your code through and through, it can boost your productivity with smart and relevant code completion, full coding assistance including customizable coding styles, keymaps and various project views, and instant navigation to a symbol's declaration or usages.
ReSharper C++ is designed to make Visual Studio a better IDE for C++ developers, providing code analysis, quick-fixes, search and navigation, smart code completion, refactorings, and others.