C++Builder is a rapid application development (RAD) environment, originally developed by Borland and as of 2009 owned by Embarcadero Technologies (a subsidiary of Idera), for writing programs in the C++ programming language currently targeting Windows (both IA-32 and x64), iOS and for several releases, macOS and Android (still supported, but only Android 32-bit apps.) C++Builder combines the Visual Component Library and IDE written in Object Pascal with multiple C++ compilers. Most components developed in Delphi can be used in C++Builder with no or little modification, although the reverse is not true, but this constraint is valid only for source code. Binary code generated by Delphi can easily be linked to binary code generated by C++Builder and vice versa to generate an executable written in both Object Pascal and C++. With this approach, C++ can be called from Object Pascal and vice versa. Since both Delphi and C++ use the same back end linker, the debugger can single step from Delphi code into C++ transparently.

C++Builder includes tools that allow drag-and-drop visual development, making programming easier by incorporating a WYSIWYG graphical user interface builder.