Comparisons

Pick Factory when the agent should run where your code already lives, from a laptop to CI to a Factory-managed computer, with models from several vendors under rolling rate limits. Pick Devin when every session can run on Cognition-hosted machines that bill quota and credits. Both return a reviewable change.

Choose Codex if OpenAI's models cover your team, since it comes inside ChatGPT plans. Choose Factory for models from Anthropic, OpenAI, Google, xAI, and open-weight providers under its own plans. Both offer a terminal agent, IDE support, headless runs in CI, and AGENTS.md project instructions.