tmux vs Zellij: Which Terminal Multiplexer Should You Use?

A terminal multiplexer lets you run several shells in one window, split the screen into panes and keep sessions alive after you disconnect. For years that meant tmux. Now Zellij, a newer multiplexer written in Rust, offers the same core features with a friendlier face. Here is how tmux vs Zellij compares in daily use and which one to pick.

What a multiplexer gives you

Persistent sessions: close the terminal or lose your SSH connection and everything keeps running.
Panes and tabs (windows in tmux) inside one terminal.
Detach and reattach from another machine.
Scriptable layouts so a project opens exactly the way you like.

Install both

# macOS
brew install tmux zellij

# Debian / Ubuntu
sudo apt install tmux

# Zellij from source or crates.io
cargo install --locked zellij

tmux basics

tmux is controlled by a prefix key, Ctrl-b by default, followed by a command key. It has been around since 2007 and is packaged for almost every system.

tmux new -s work        # start a named session
tmux ls                 # list sessions
tmux attach -t work     # reattach

# inside tmux (after Ctrl-b):
%   split left/right
"   split top/bottom
c   new window
d   detach

Configuration lives in ~/.tmux.conf. A common first edit is moving the prefix to Ctrl-a, turning on the mouse and starting window numbers at 1. The plugin manager TPM adds extras such as session saving.

Zellij basics

Zellij shows a status bar listing the available keys and the current mode, so you can use it without memorising anything. Pressing Ctrl-p enters pane mode, Ctrl-t tab mode, and Ctrl-o session mode, where you can detach.

zellij                  # new session
zellij attach work      # attach to a session by name
zellij ls               # list sessions

Settings live in ~/.config/zellij/config.kdl. Layouts are written in KDL and can be launched by name. Zellij also supports floating panes, and sessions can be resurrected after a reboot because it saves their layout.

Side by side

Learning curve: Zellij wins. The on-screen key hints remove most of the guessing. tmux needs a cheat sheet.
Availability: tmux wins. It is installed or one package away on nearly every server. Zellij is a single binary but is rarely pre-installed.
Defaults: Zellij works nicely out of the box. A stock tmux feels dated until you add a config.
Layouts: both are scriptable. Zellij layouts are easier to read, while tmux has years of scripts and tools such as tmuxinator.
Ecosystem: tmux has more plugins and tutorials. Zellij has a growing plugin system based on WebAssembly.
Keybinding clashes: Zellij’s default shortcuts can collide with editors and TUI apps. Its locked mode, toggled with Ctrl-g, passes every key through to the program you are running.

Which one should you use?

Working on remote servers: learn tmux. It will be there when you SSH into a fresh box.
Mostly local, on a laptop: try Zellij first. You will be productive in minutes.
New to multiplexers: start with Zellij, then pick up tmux basics later.
Already happy with tmux: there is no urgent reason to switch.