Comparison

Gemini CLI vs Roo Code

How the two compare on the things that decide whether your setup carries over: open standards, license, models and where they run.

Gemini CLIRoo Code
MakerGoogleRoo Code
LicenseApache-2.0Apache-2.0
ModelsGoogle Gemini modelsSee vendor docs
Runs inTerminalIDE
MCPMCP: supportedMCP: supported
Agent SkillsAgent Skills: supportedAgent Skills: supported
AGENTS.mdAGENTS.md: supportedAGENTS.md: supported
ACPACP: supported?ACP: not yet verified

Key differences

  • Both are open source (Apache-2.0 and Apache-2.0), so you can inspect and self-host either.
  • Gemini CLI also runs in Terminal; Roo Code also runs in IDE.
  • Gemini CLI supports ACP; we have not verified it for Roo Code.
  • Both support MCP, Agent Skills, AGENTS.md, so MCP servers, skills and repo instructions you set up carry over if you switch.

In their own words

Gemini CLI

Google's open-source terminal agent for Gemini models, with MCP servers, extensions, Skills and AGENTS.md support.

WebsiteMCP docs

Roo Code

Open-source multi-mode coding agent for VS Code with custom modes, MCP, Skills and AGENTS.md.

Website

FAQ

Is Gemini CLI or Roo Code open source?
Gemini CLI is open source under Apache-2.0. Roo Code is open source under Apache-2.0.
Do Gemini CLI and Roo Code support MCP servers?
Gemini CLI: yes. Roo Code: yes.
Can I reuse Agent Skills between Gemini CLI and Roo Code?
Yes. Both read the open Agent Skills (SKILL.md) format, so the same skill folder works in both.

Set up MCP servers in either one

MCP install guide for Gemini CLIAll official MCP servers

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Reviewed Oct 5, 2026.