xterm is the standard terminal emulator for the X Window System. A user can have many different invocations of xterm running at once on the same display, each of which provides independent input/output for the process running in it (normally the process is a Unix shell). Developed by Thomas E. Dickey
License: Open Source
iTerm is a feature-rich terminal emulator for macOS, offering extensive customization options and advanced functionalities like split panes and search. In contrast, xterm is a lightweight, standard terminal emulator for Unix-like systems, prioritizing speed and compatibility over advanced features.