Devon

What it does

Writes code alongside you rather than handing back a finished patch, so you can interrupt and redirect as it works, running on an Anthropic or OpenAI key. Development stopped in May 2025, and this is a category that moved a great deal afterwards — the assumptions about models and workflows have aged. Interesting to look at; pick something maintained if you intend to depend on it. AGPL-3.0.

Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.

Screenshots & visuals

Before you start

• Setup difficultyFor advanced users
• Command lineRequired
• API keyRequired
• Sends data onlineYes

Judged automatically from the project's own metadata. Always confirm on the official page.

Devon FAQ

Is Devon free?

Devon itself is free, but it needs an API key for an external AI service. That service charges separately, though some have a free tier.

Do I need to install anything or write code to use Devon?

It needs the command line. If you are not comfortable typing commands, expect to get stuck during setup.

Does Devon work on a phone?

No. It needs a computer.

Can I use Devon commercially?

The licence is AGPL-3.0. Using it commercially is fine, but if you distribute something built on it you may be required to release that under the same licence. Keep it internal, or check before distributing.

How it compares

The conditions that decide whether you can actually use it, side by side.

"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.

Other claude code ecosystem tools