What it does

NestMux is a terminal workspace for developers who use more than one AI coding agent. Rather than keeping each assistant in its own tab or app, it lays terminals out in a grid of panes. The site names Claude, Gemini, Codex, Copilot, OpenCode and Aider, and says custom CLIs work too. Each pane has its own process, HOME directory and account, so you can switch agents mid-task. Work is organised around git. The site describes native worktrees that give each branch its own dev environment, dependencies and port, so two agents can work on two branches without colliding. A built-in diff viewer and PR review work with GitHub and GitLab. A visual MCP panel connects services such as Slack, Linear and Notion, or any MCP server. The page also mentions a Chromium browser cell next to an agent, voice input through local Whisper, and a snippet library with a broadcast action that sends one prompt to several panes. For teams there is a shared workspace with live chat that includes GitHub events, terminals you can share with an 8-character code, shared snippets and MCP configs, and team analytics. The site calls the app local-first with no telemetry and offers downloads for macOS 13+, Windows 10+ and Linux.

Capabilities

Terminal panes in a grid, each with its own process, HOME directory and account
Native git worktrees giving each branch its own environment, dependencies and port
Built-in diff viewer and PR review for GitHub and GitLab
Visual MCP panel for connecting MCP servers and services
Snippet library and broadcast of one prompt to several panes
Team workspace with shared terminals, shared configs and activity analytics

When to use it

Running Claude, Gemini or Codex on the same task and comparing their output
Handling parallel refactors with one agent per branch
Sharing terminals, prompts and MCP setups across a team

Alternatives to explore

tmux
Orca