T3 Code and Coagy: one person or a whole team

Short answer: T3 Code is an excellent free tool for one person running many coding agents across their own devices. If that's you, use it. If your team needs to see each other's agents, ask them questions and hand work over, that's what Coagy adds.

What T3 Code is

T3 Code is an open-source "control plane for coding agents" from Theo (t3dotgg) and the Ping team, released under the MIT license (t3.codes, GitHub).

• It has a desktop app for macOS, Windows and Linux, a t3 CLI, a web app, and iOS and Android apps.
• It runs Claude Code, Codex, Cursor, OpenCode, Grok Build, Antigravity, Kiro, Pi and any ACP agent, using the logins you already have.
• Each thread can have its own git worktree. You review diffs, commit, push and open pull requests in the app.
• Agents run on your own machines. Your other devices connect over your LAN, Tailscale or T3 Connect, and every client sees the same threads.
• It's free, very active (around 58.5k GitHub stars), and its releases are marked pre-release.

It's one of the best tools for a single developer who wants to run many agents and check on them from a phone.

Coagy Local, for one person

Coagy Local is Coagy's free, single-player app. It runs Claude Code, Codex, Cursor, OpenCode and more side by side on your own computer, each task optionally in its own worktree, with no account. It runs on macOS on Apple Silicon and Linux.

If you are choosing between T3 Code and Coagy Local as one person, both are fine. T3 Code has more platforms, mobile apps and a much larger community. Coagy Local comes from the team that makes Coagy, so it's an easy step up if your team later wants a shared workspace.

Where T3 Code stops

T3 Code is about one person's agents across that person's devices. It doesn't describe team features. Nobody else on your team sees your threads, and you don't see theirs.

That's fine until a second developer's agent starts touching the same repository. Then the questions start: what is your agent doing, which branch is it on, why did it change that file.

What Coagy adds for a team

Coagy is a shared workspace for a team's coding agents. Each developer keeps running Claude Code, Codex, Gemini CLI or Cursor on their own computer with their own AI account. A small connector mirrors their sessions into the team's workspace.

	T3 Code	Coagy
Run many agents, each task in its own worktree	Yes	Yes
Uses your own AI logins	Yes	Yes
See your own agents from other devices	Yes, including phone apps	Yes, in the web workspace
Teammates see each other's agents live	No	Yes
Ask a teammate's agent a question, owner approves the answer	No	Yes
Steer a teammate's agent, with the owner's approval	No	Yes
Hand a session to a teammate with context	No	Yes
Shared project memory every agent can search	No	Yes
Price	Free, open source	Free for up to 4 developers

Sessions are private by default, and the owner chooses what to share. The connector runs on macOS, Linux and Windows 10 or 11 without admin rights, and agents can keep running in Coagy cloud when your laptop is closed.

Which one to pick

• You work alone: T3 Code or Coagy Local.
• You're a team of two or more and everyone runs agents: Coagy. See can multiple people use Claude Code on the same project? and how to hand off an AI coding session.

Other single-player options worth a look: Emdash and Claude Squad.

Questions

What is T3 Code?

T3 Code (t3code) is an open-source, MIT-licensed control plane for coding agents from Theo and the Ping team. It runs Claude Code, Codex, Cursor, OpenCode and other agents on your own machines, with desktop, web, CLI and mobile apps that all see the same threads.

Is T3 Code free?

Yes. T3 Code is free and open source under the MIT license. Its releases are currently marked pre-release.

Does T3 Code have team features?

Not that it describes. T3 Code connects one person's agents across that person's devices. Coagy is built for teams: teammates can watch each other's agents live, ask them questions and steer them with the owner's approval.