Visual Studio Build Tools now include the VS2017 and VS2015 MSVC Toolsets (C++ Team Blog)
The Visual C++ Build tools have been a huge success since we introduced them two years ago. The C++ Build Tools were originally released as a standalone installer that only laid down the tools required to build C++ projects without installing the Visual Studio IDE. Many developers have found them useful in environments that don’t require a full VS install such as build servers or CI systems. The tools are always kept up-to-date, shipping only the latest supported version of the MSVC compiler toolset.