T3 Code alternative: a native Mac terminal instead of a control plane

T3 Code is the open-source control plane for coding agents from T3 Tools: a desktop app, a web app and iOS and Android apps that drive Claude Code, Codex, Antigravity, OpenCode, Cursor and Grok through their SDKs. Every thread gets its own branch, and a button commits, pushes and opens a pull request with a generated title. It's free, MIT-licensed and moving fast.

omux is smaller and closer to the metal. It's one native Swift window, about 5 MB, that runs the real Claude Code and Codex terminals side by side under projects, reads their own signals for status, and puts Allow and Deny in the sidebar. No server, no Electron, no reimplemented chat view. This page is a fair look at which shape fits you.

Download omux for macOS About T3 Code

At a glanceomuxT3 Code

Native macOS app✓✕

Real terminal per session✓~

Agent status✓✓

Allow/Deny from the sidebar✓✓

Split panes✓✕

Branch per task with one-click PR~✓

iOS and Android apps✕✓

Windows and Linux✕✓

Free and open source✓✓

5 MBnative Swift app, no Electron
0accounts, credits or telemetry
6sessions side by side per project
MITfree and open source

omux with eight projects in the sidebar, a session running five subagents, a session waiting on Allow or Deny, two Codex sessions, and the Changes tab showing the diff — omux: projects and sessions on the left, the agent in the middle, its diff on the right. The session that needs you shows Allow and Deny.

Where the agent lives

T3 Code

Electron desktop, web, iOS and Android

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T3 Code server on your machine

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Agent SDKs: Claude Code, Codex, Cursor, Grok…

omux

One native macOS window, about 5 MB

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Claude CodeClaude CodeCodexCodexshell

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The real Claude Code and Codex, on your own plans

working needs you done

Side by side

	omux	T3 Code
What it is	A session manager with a real terminal per Claude Code or Codex session	A control plane that drives agent harnesses through their SDKs, one chat-style thread per task
Runs on	macOS, native Swift, about 5 MB	macOS, Windows and Linux desktop (Electron), web, iOS and Android
Agents	Claude Code and Codex, plus plain shells	Claude Code, Codex, Antigravity, OpenCode, Cursor and Grok, with more added often
How you see the agent	Its own terminal UI, exactly as in Terminal	A thread view rendered by T3 Code; a terminal is available too
Agent status	✓ working, needs you, done, read from the agents' own signals	✓ per thread, with push notifications on the phone apps
Answer a permission prompt	Allow and Deny buttons in the sidebar and header, without switching	✓ inside the thread
Subagents	Listed under the session with transcripts	Shown inside the thread
Git	Optional worktree per session, pull request status, merge and clean up	A branch per thread, one-button commit, push and PR with generated titles; draft and stacked PRs
Diff review	Changes panel with review notes sent to the agent	Inline diff review before pushing
Split panes	✓ a resizable canvas per project, up to six sessions	✕
From your phone	✕	✓ native iOS and Android apps that reach your machine
Scripting	✓ omux CLI over a local socket	Not a focus
Maturity	Young, small and focused	Early by its own description, with a large community
Price and license	Free, MIT	Free, MIT

See omux in 37 seconds

From scattered terminals to one window: projects, status, Allow and Deny, subagents, panes and pull requests.

Pick T3 Code if

You want to check on and steer agents from your phone, or from a browser on another machine.
You run agents beyond Claude Code and Codex and want them all in one place.
You like the branch-per-thread flow with generated pull requests and stacked PRs built in.

Pick omux if

You want the real terminal UI of Claude Code and Codex, not a rendering of it, with status and permissions read from the agents themselves.
You want a 5 MB native app with no server and no Electron, and split panes so several sessions share one project view.
You prefer a worktree per session with the pull request's state and the diff right next to the agent.

What omux does for every session

Projects with sessions under them, in a sidebar
Shows whether each agent is working, needs you or is done
Allow or Deny an agent's permission request without switching to it
Lists a session's subagents and opens their transcripts
Resumes each Claude Code and Codex conversation after a relaunch
Git worktree per session, with pull request status and merge
Files, Changes (diff with review notes) and Browser panels
Claude and Codex plan usage limits in the sidebar
Split panes: up to six sessions side by side per project, layouts saved
An omux command line: list, status, send, new, close and wait on sessions
macOS notifications with sound

Questions

Is T3 Code a terminal?

Not primarily. It talks to agents through their SDKs and shows each task as a thread, with a terminal available when you need one. omux is the other way round: every session is a terminal first, with the sidebar and panels built around it.

Can I use omux and T3 Code together?

Yes. They don't interfere, since each starts its own agent processes. Many people keep a desktop tool for focused work and a phone app for checking in.

Which one is more mature?

T3 Code has the larger community and ships often, and its own site says to expect bugs. omux is a younger, smaller project with a narrower scope. Read both changelogs and pick the one whose direction matches your work.

Also compared: Terminal alternative, tmux alternative, cmux alternative, Warp alternative, herdr alternative, VS Code alternative, Cursor alternative, Antigravity alternative, Devin alternative. Facts about T3 Code come from its public documentation as of 2026-11-02; if something is out of date, open an issue.