Comparison

Codex vs Factory Droid

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

CodexFactory Droid
MakerOpenAIFactory
LicenseApache-2.0Proprietary
ModelsOpenAI modelsSee vendor docs
Runs inTerminal, IDE, Desktop, WebTerminal, IDE, CI/CD
MCPMCP: supportedMCP: supported
Agent SkillsAgent Skills: supportedAgent Skills: supported
AGENTS.mdAGENTS.md: supportedAGENTS.md: supported
ACPACP: supportedACP: supported

Key differences

  • Codex is open source (Apache-2.0); Factory Droid is proprietary. If you need to self-host, audit or fork the harness, that settles it.
  • Codex also runs in Desktop, Web; Factory Droid also runs in CI/CD.
  • Both support MCP, Agent Skills, AGENTS.md, ACP, so MCP servers, skills and repo instructions you set up carry over if you switch.

In their own words

Codex

OpenAI's coding agent across CLI, IDE, ChatGPT and cloud. One of the originators of AGENTS.md, with Skills, MCP and a plugin marketplace.

WebsiteMCP docs

Factory Droid

Delegates whole tasks (refactors, migrations, incident response) to Droids from IDE, CLI or CI/CD.

Website

FAQ

Is Codex or Factory Droid open source?
Codex is open source under Apache-2.0. Factory Droid is proprietary.
Do Codex and Factory Droid support MCP servers?
Codex: yes. Factory Droid: yes.
Can I reuse Agent Skills between Codex and Factory Droid?
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 CodexAll official MCP servers

More comparisons

Claude Code vs CodexCodex vs Gemini CLICodex vs CursorCodex vs GitHub CopilotCodex vs OpenCodeCodex vs gooseCodex vs Hermes AgentCodex vs OpenClawCodex vs ClineCodex vs KiroCodex vs AmpCodex vs Roo Code

Reviewed Oct 5, 2026.