cmux

What it does

cmux is a free, open-source macOS terminal for people who run coding agents or other command-line work. It provides vertical tabs and workspaces, split panes, and a sidebar showing details such as the Git branch, working directory, ports, and notification text. Agent processes can run locally using the user's own keys, or in paid cloud VMs; the product is a terminal and workspace interface, not itself a coding model.

During work, notification rings and badges flag processes that need attention. A built-in browser can sit beside the terminal; its socket API supports navigation and browser actions, while the CLI and socket also expose workspace and pane controls, input, screen contents, and screenshots. The app can open SSH workspaces and attach to remote tmux sessions through a beta feature. Local agent use requires the relevant agent and its own keys; cloud execution requires a paid plan. The documented desktop requirements are macOS 14 or later and an Apple Silicon or Intel Mac. Session restore does not checkpoint arbitrary live process state: unsupported apps and ordinary shells reopen as normal terminals.

What it can do

• Organizes terminal work in vertical tabs, workspaces, and split panes
• Displays process-attention notifications as pane rings and sidebar badges
• Provides a built-in browser pane with scriptable browser controls
• Exposes workspace, pane, input, screen-reading, and screenshot controls through CLI and socket API
• Opens SSH workspaces and attaches to remote tmux sessions
• Restores window, workspace, pane, working-directory, and scrollback layout

Works with

• Claude Code
• Codex
• Gemini CLI
• OpenCode
• SSH
• tmux

Before you choose

• The documented app requires macOS 14 or later on Apple Silicon or Intel Mac; other desktop operating systems are not documented.
• Local CLI agents use the user's own keys; cloud VMs are included only with paid plans, and cloud execution has separate plan resource limits.
• Session restore does not checkpoint arbitrary live process state; unsupported terminal apps, tmux, vim, and ordinary shells reopen as normal terminals.
• The iOS companion is beta and pairs with a Mac. Paid plans list mobile access; homepage language also refers to Founder’s Edition early access, so confirm enrollment.

Listed under

• Coding
• Coding agents
• AI coding agents
• Cloud vms
• Developer tools
• MacOS
• Multitasking
• Open source

Get started

Install from the DMG or with Homebrew.

1. Download the Mac DMG or install with Homebrew using `brew tap manaflow-ai/cmux` and `brew install --cask cmux`.
2. Open cmux; on first launch, macOS may ask you to confirm opening the app.
3. To use the CLI from other terminals, install `cmux` in PATH through the command palette or create the documented symlink.

Free includes the terminal and local agents with the user's own keys; cloud VMs are paid. Pro is $50 monthly or $480 yearly; Max is $200 monthly or $1,920 yearly. Team is $60 per user monthly. Enterprise is custom-priced. No trial is stated. External agent/model subscriptions or API usage are separate.

Source: cmux.com/pricing, checked 1 Nov 2026. Prices can change; check before you buy.

Sources for this overview

Product pages, documentation, and pricing checked 1 Nov 2026. Each source supports part of the overview; availability and prices can change.

• cmux - The terminal built for multitasking ↗cmux.com
• Getting Started — macOS — cmux docs ↗cmux.com
• Pricing — The terminal built for multitasking ↗cmux.com

Company website

cmux.com: product, pricing and policy pages

YC directory mirror

Batch and company name

Social accounts

Accounts the company links, and its posts on X

Human review

Checked by a person

manual_review

Last checked 1 Nov 2026. Every field keeps its source and date; unknown means we couldn’t confirm it.