The best open source alternative to Zellij is WezTerm. If that doesn't suit you, we've compiled a ranked list of other open source Zellij alternatives to help you find a suitable replacement.
Zellij alternatives are mainly Terminal Emulators but may also be Terminal Multiplexers. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Zellij.
Cross-platform terminal emulator and multiplexer with GPU acceleration, true color support, and Lua configuration. Runs on Linux, macOS, Windows, FreeBSD, and NetBSD.

WezTerm is a powerful cross-platform terminal emulator and multiplexer that brings modern features to your command line experience. Built with performance in mind, it leverages GPU acceleration to deliver smooth rendering and responsive interactions.
Key capabilities include:
The tool provides extensive configuration options through its Lua-based config system, allowing you to customize colors, key bindings, and behavior. Its modular architecture includes specialized modules for color management, GUI operations, multiplexing, plugins, and more. Whether you're a developer, system administrator, or power user, WezTerm offers the flexibility and performance needed for productive terminal work.