cmux

The open-source terminal built for coding agents

5.0•1 review•

70 followers

The open-source terminal built for coding agents

5.0•1 review•

70 followers

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cmux is the open-source terminal built for multitasking with coding agents. It has vertical tabs, notifications, a built-in browser, and it's built on Ghostty. When Claude Code needs you, the pane glows blue and the sidebar tells you why. No Electron/Tauri. Just Swift/Appkit.

The Best cmux Alternatives

The best cmux alternatives are iTerm2, Ghostty, Otty, PrettyMux, and Warp.

iTerm2

5.0 ·

Choose iTerm2 if...

✓you want a familiar macOS power terminal
✓you prefer low learning curve and polish
✓you rely on deep customization and autocomplete

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Ghostty

5.0 ·

Choose Ghostty if...

✓you want a fast GPU terminal daily driver
✓you prefer clean UI with minimal bloat
✓you run long sessions and hate lag

See details ↓

Otty

Choose Otty if...

✓you need reliable session recovery after restarts
✓you use Claude Code and resume often
✓you want tmux-like continuity without heavy UI

See details ↓

PrettyMux

Choose PrettyMux if...

✓you want cmux-like workflows on Linux
✓you want fast search across tabs and panes
✓you want an integrated lightweight browser built in

See details ↓

Warp

4.8 ·

Choose Warp if...

✓you want blocks, workflows, and structured history
✓you want built-in AI help for commands
✓you need the same terminal across OSes

See details ↓

What to Consider

cmux has quickly stood out as an agent-first terminal multiplexer on macOS, built around coordinating multiple coding agents with clear “needs attention” cues, metadata-rich tabs, notifications, and an integrated browser. The alternatives span everything from classic, general-purpose power terminals like iTerm2 (deep features with a familiar model) to Ghostty’s fast, clean GPU-accelerated approach that prioritizes staying out of your way. On the more “new terminal UX” end, Warp leans into blocks, workflows, and built-in AI assistance across platforms, while niche options like Otty emphasize resilient session recovery (notably for Claude Code) and PrettyMux aims to bring a cmux-like, Ghostty-based workflow to Linux.

In evaluating these options, we considered OS support and daily-driver reliability, performance under long-running sessions, and how steep the learning curve feels for typical dev workflows. We also weighed agent-centric capabilities (orchestration, attention/notification UX), integrated browsing and search, recovery/resumability, customization, compatibility with terminal/TTY-heavy tools, and practical adoption factors like account requirements and privacy expectations.

iTerm2

Mac OS Terminal Replacement

5.0 · 3 reviews

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iTerm2 is the classic “power terminal” choice on macOS: it sticks to a familiar terminal model while offering a deep, mature feature set for everyday development. Compared with cmux’s agent-orchestration focus, iTerm2 is better when the goal is a reliable daily driver for shells, SSH, git, and the usual developer toolbox—without adopting a new agent-first UI paradigm.

Where it shines is breadth and ergonomics: tabs and splits, strong search, automation hooks, and extensive customization that make the environment feel personal and consistent across projects. It’s also a comfortable fit for teams because it behaves like a traditional terminal emulator, which reduces workflow friction when pairing, documenting commands, or handing off instructions.

If cmux’s attention cues and embedded browser are more than is needed, iTerm2 delivers a simpler mental model with plenty of power underneath. It’s the better pick when stability and familiarity matter more than specialized agent coordination features.

Best for

Best for macOS developers who want a familiar, feature-rich terminal as a dependable daily driver.

Standout features

✓Mature tabs and split panes
✓Extensive customization and theming
✓Autocomplete and productivity shortcuts
✓Automation and scripting support

Ghostty

A fast, feature-rich, and cross-platform terminal emulator

5.0 · 10 reviews

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Ghostty is built around speed and simplicity, aiming to be a clean, GPU-accelerated terminal that stays out of the way. Against cmux—whose value is agent coordination, attention rings, and an integrated browser—Ghostty is the better fit when a fast, minimal daily terminal is the priority and extra orchestration UI feels like overhead.

The experience is intentionally straightforward: strong defaults, a native feel, and performance that holds up under long-running sessions. That makes it appealing for developers who live in the terminal all day, including those running AI-agent CLIs, but who prefer to manage workflow with existing tools and conventions.

Ghostty also serves as a solid foundation for power users who want customization without “config bloat”. If the goal is maximum responsiveness and a modern terminal core rather than an all-in-one agent workspace, Ghostty is a compelling alternative.

Best for

Ideal for developers who want a fast, clean terminal emulator for long daily sessions.

Standout features

✓GPU-accelerated rendering
✓Clean, straightforward UI
✓Great defaults with deep configurability
✓Handles long sessions smoothly

Otty

A native and beautiful terminal emulator

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Otty stands out by putting session recovery and continuity front and center, especially for agent-driven workflows like Claude Code. While cmux focuses on attention management, metadata, and an integrated browser for coordinating multiple agents, Otty is the stronger choice when the biggest pain is losing context after restarts, crashes, or reconnects.

Its approach is practical: resume supported agent sessions reliably and recover the important pieces of your workspace, such as scrollback and layout. That makes it feel closer to “tmux-like continuity” for modern agent CLIs—without requiring users to commit to a more opinionated orchestration interface.

For users who keep many long-lived tasks running and want confidence they can pick up where they left off, Otty’s recovery-first design can be a more direct upgrade than cmux. It’s less about supervising multiple agents at once, and more about never losing the thread of work.

Best for

Best for macOS agent-CLI users who prioritize resumable, recoverable sessions.

Standout features

✓Claude Code session resume support
✓Scrollback and layout recovery
✓Continuity across restarts
✓Agent-friendly workflow focus

PrettyMux

The linux terminal built for Agents and Multiplexing

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PrettyMux is the closest “cmux-like” option for people who want the same multiplexer concept outside macOS, with a Linux-first posture. If cmux is appealing for vertical tab organization and an integrated browser, PrettyMux targets that same style of workflow while aiming to run where cmux doesn’t.

It leans into navigability across many concurrent tasks: fast search across tabs, panes, and workspaces helps when juggling multiple projects or agents. Visual touches like project favicons in tabs make scanning and switching contexts quicker, which matters once the terminal becomes a hub for parallel work.

PrettyMux is the better pick when the goal is an all-in-one multiplexer feel—splits, quick switching, lightweight browsing—on Linux (and potentially beyond). The trade-off versus cmux is ecosystem maturity, but the core idea maps well for users who want that integrated, multi-session cockpit.

Best for

Ideal for Linux users who want a cmux-style multiplexer with built-in browsing.

Standout features

✓Linux-first cmux-like multiplexer
✓Fast search across tabs and panes
✓Integrated lightweight browser
✓Project favicons in tabs
✓Split-screen workflows

Warp

The open-source ADE

4.8 · 77 reviews

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Warp rethinks the terminal as a modern, structured interface, with blocks, richer history navigation, and built-in AI assistance. Compared with cmux’s focus on coordinating multiple coding agents via attention cues and metadata, Warp’s advantage is an IDE-like experience that makes commands, output, and reusable workflows easier to discover and repeat.

Its block model turns past output into something you can scan, share, and reuse rather than a long scrollback stream. Features like saved workflows and snippet sharing push it beyond “just a terminal,” which can reduce context switching for developers who often run the same sequences of commands.

Warp is also a strong alternative when cross-platform consistency matters, especially for people moving between macOS, Linux, Windows, and WSL/SSH setups. The main trade-off versus cmux is that Warp’s experience is more opinionated and app-like, but it can be the better fit when convenience, AI help, and structured UX outweigh a more native multiplexer approach.