Google Antigravity vs Moontors, two ways to run coding agents
Running several coding agents at once has gone from a trick to a product category, and Google Antigravity is now the biggest name in it. It's a good moment to compare it with something built differently. Disclosure: I b
Running several coding agents at once has gone from a trick to a product category, and Google Antigravity is now the biggest name in it. It's a good moment to compare it with something built differently.
Disclosure: I build the other one, Moontors. What this says about Antigravity comes from Google's own docs, and each claim links its page.
The short version
| Google Antigravity | Moontors | |
|---|---|---|
| What it is | An app, a command-line client, an IDE, editor extensions and an SDK | A desktop app with one board, and phone apps |
| Agents | Google's own agent, on a choice of models | Claude Code, Codex, Gemini CLI and Grok Build themselves |
| Systems | macOS, Windows, Linux | macOS, Windows, Linux |
| Worktrees | A worktree mode | A git worktree per session, when you want one |
| On your phone | A browser dashboard | Android and iPhone apps |
| App closed | Remote Agents carry on in Google's environment, on Google AI Pro or Ultra | Sessions keep working in a background service |
| Account | A Google account, or a Gemini API key with its command-line client | No Moontors account needed |
| Price | Free with a weekly quota, more on Google's paid plans | Free |
The agents
Antigravity is built around Google's own agent, and you pick the model it runs on: Gemini or Claude, depending on your plan. Moontors takes the other road. It runs each vendor's own agent as that vendor ships it, with your own settings, skills and MCP servers: Claude Code, Codex, Gemini CLI and Grok Build, side by side.
It also changes who you pay. Antigravity's models come with Google's plans, and it takes no other vendor's key, so past its free quota, that's an extra bill if you already pay for Claude or ChatGPT. In Moontors, Claude Code runs on your Claude subscription and Codex on your ChatGPT sign-in.
Working together
Both have an answer to "more than one agent on a job", and they're different answers.
Antigravity's subagents are started and coordinated by its agent, and message each other among Antigravity's own agents. Its Teamwork command, on paid plans, coordinates a team of them on a large project.
In Moontors, sessions can message each other across vendors. You tell your Claude Code session "ask the Codex session to run its tests" in plain words, the message arrives in that session as its next prompt, and the answer comes back the same way.
On your phone
Antigravity's Remote Control drives your desktop and command-line sessions from any browser, including a phone's, and a phone can keep it on its home screen. Moontors has native apps for Android and iPhone: you pair once by QR code, then follow your sessions and answer them.
Your sessions
Antigravity's terms say it records your interactions and uses them to improve Google's products, services and machine learning technologies, and that you can change that in its settings.
With Moontors, sessions run on your own computer and no Moontors server can read them. It counts how it's used and reports its errors, never your code, prompts or sessions, and you can turn that off. It's closed source.
Why Moontors
- Your agents are the vendors' own: Claude Code, Codex, Gemini CLI and Grok Build, each as it ships, with your settings, skills and MCP servers.
- It's free, and your Claude and ChatGPT plans work.
- They work together across vendors, every session a live card on one board.
- You answer them from a native app on your phone, and your sessions stay on your own computer.
The full comparison has every source. These tools change fast, so if something here is out of date, tell me and I'll fix it.
AI did the writing, I did the reading, and we both took credit.
Originally published by Dev.to AI. Aggregated on AIWithGhost for educational purposes — full credit and traffic to the original publisher.