mmux vs Warp

What is Warp?

Warp describes itself as "an agentic development environment, born out of the terminal" [1]. It is a desktop terminal application for macOS, Windows and Linux [2] with the Warp Agent built in, which uses a curated list of models from providers such as OpenAI, Anthropic and Google [3]. The same agent is also available as a standalone warp CLI for other terminals, which requires logging in to a Warp account [4]. Inside the app, Warp detects third-party CLI agents such as Claude Code, Codex, OpenCode and Gemini CLI and adds a rich input editor, code review comments, vertical tab metadata and Remote Control [5].

Beyond the desktop, Warp runs cloud agents on Warp-hosted compute or your own infrastructure, started by Slack messages, Linear or GitHub events, CI failures or schedules [6]. The homepage now leads with "Warp Factories", fleets of agents built on that platform [7].

The terminal itself works without an account [2]. AI usage is metered: as of October 2026 the pricing page lists a Free plan with pay-as-you-go usage and bring-your-own-key, Build at 20 USD per month with 20 USD of agent usage at API rates, Max at 200 USD per month, and Business at 50 USD per seat [8]. Warp's October 2025 pricing announcement counted the Build allowance as 1,500 credits per month [9]; the current page states it in dollars. The client source is on GitHub, with the UI framework under MIT and the rest under AGPLv3 [1].

Where Warp is better

• An agent out of the box. Warp ships its own agent and lets you pick between hosted models [3]. mmux has no agent of its own; it launches CLIs you install and pay for separately.
• Cloud agents. Warp can run agents away from your laptop, on its compute or yours, and start them from Slack, Linear, GitHub, CI or a schedule [6]. mmux runs everything on the machine it is started on.
• Windows. Warp runs natively on Windows 10 (version 1903) or later, x86_64 and ARM64 [2]. mmux supports macOS and Linux only.
• Editing and reviewing agent work. Warp adds a rich input editor and inline code review comments to supported CLI agents [5]. mmux shows the agent's own terminal UI unchanged and offers a git panel with a diff preview instead of review comments.
• A full terminal app. Warp is the terminal: tabs, split panes, vertical tabs and session restoration are part of the app [10][11]. mmux needs a terminal to run in and tmux on the machine.

Where mmux is better

• Agents keep running when the window closes. mmux runs inside an invisible, per-directory tmux session, so closing the terminal or dropping SSH detaches without stopping anything. mmux attach rejoins from anywhere. Warp's session restoration brings back layout and recent output, and its docs do not describe processes surviving a quit [11].
• Conversations come back after a quit or restart. Reopening a directory resumes Claude, Codex, Pi and Grok agents in their previous conversation and reopens terminals where you left them.
• Any terminal, any SSH session. mmux runs in whatever terminal you use, including on a remote host over plain SSH, and switches to a single-column layout under 60 columns for a phone. Notifications travel as terminal escapes, so they reach your desktop across the SSH hop.
• Notifications for every agent. Any program that rings the bell or emits OSC 9 or OSC 777 lights up its sidebar row and raises a desktop notification. Warp's agent notifications cover Claude Code, Codex and OpenCode [5].
• Dev processes and worktrees in one place. Processes from mmux.yaml start, stop and restart from the sidebar. A git worktree opens as its own project box, and only one checkout of a repository runs a given process at a time, so ports do not clash.
• No account, no usage bill. mmux is free and GPLv3. The only AI cost is whatever the agent CLIs you run in it cost you.

When to use which

Using Warp and mmux together

mmux is a full-screen terminal program, so a Warp tab can host it. Warp then sees one program in that tab: its per-agent features (rich input, review comments, agent notifications) apply to agents started directly in a Warp tab, not to the ones running inside mmux. mmux's own sidebar states and notifications take over there.

1. Install mmux and open a project directory in a Warp tab.
2. Run mmux init and pick your agents, then mmux to open the session.
3. Optionally add Warp's own agent CLI as an mmux agent in ~/.mmux/config.yaml (it needs a Warp login [4]).
4. Close the Warp window whenever you like; run mmux attach later, from Warp or any other terminal, to rejoin.

# ~/.mmux/config.yaml
agents:
  - name: Claude
    cmd: claude
  - name: Warp
    cmd: warp